/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:28:26,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:28:26,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:28:26,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:28:26,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:28:26,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:28:26,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:28:26,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:28:26,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:28:26,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:28:26,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:28:26,529 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:28:26,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:28:26,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:28:26,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:28:26,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:28:26,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:28:26,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:28:26,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:28:26,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:28:26,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:28:26,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:28:26,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:28:26,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:28:26,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:28:26,803 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:28:26,804 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:28:26,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl [2021-03-10 21:28:26,805 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl' [2021-03-10 21:28:26,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:28:26,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:28:26,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:28:26,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:28:26,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:28:26,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:28:26,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:28:26,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:28:26,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:28:26,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... [2021-03-10 21:28:26,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:28:26,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:28:26,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:28:26,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:28:26,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:28:26,918 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:28:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:28:26,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:28:26,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:28:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:28:26,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:28:26,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:28:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:28:26,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:28:26,920 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:28:27,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:28:27,160 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:28:27,161 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:28:27,162 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:28:27 BoogieIcfgContainer [2021-03-10 21:28:27,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:28:27,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:28:27,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:28:27,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:28:27,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:26" (1/2) ... [2021-03-10 21:28:27,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3008760d and model type unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:28:27, skipping insertion in model container [2021-03-10 21:28:27,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:28:27" (2/2) ... [2021-03-10 21:28:27,166 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.bpl [2021-03-10 21:28:27,169 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:28:27,170 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:28:27,172 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:28:27,172 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:28:27,210 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:28:27,221 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:28:27,243 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:28:27,243 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:28:27,243 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:28:27,244 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:28:27,244 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:28:27,244 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:28:27,244 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:28:27,244 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:28:27,251 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-03-10 21:28:27,258 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:28:27,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:27,263 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:27,263 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1485035801, now seen corresponding path program 1 times [2021-03-10 21:28:27,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:27,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899638528] [2021-03-10 21:28:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:27,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899638528] [2021-03-10 21:28:27,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:27,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:28:27,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754399449] [2021-03-10 21:28:27,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:28:27,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:28:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:27,453 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:27,490 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-03-10 21:28:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:28:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:28:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:27,500 INFO L225 Difference]: With dead ends: 26 [2021-03-10 21:28:27,500 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 21:28:27,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 21:28:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 21:28:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-03-10 21:28:27,523 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-03-10 21:28:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:27,523 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-03-10 21:28:27,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-03-10 21:28:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:28:27,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:27,524 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:27,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:28:27,524 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash -258877683, now seen corresponding path program 2 times [2021-03-10 21:28:27,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:27,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984849549] [2021-03-10 21:28:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984849549] [2021-03-10 21:28:27,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:27,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:28:27,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339614513] [2021-03-10 21:28:27,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:28:27,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:28:27,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:27,573 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:27,593 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-03-10 21:28:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:28:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:28:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:27,594 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:28:27,594 INFO L226 Difference]: Without dead ends: 23 [2021-03-10 21:28:27,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-03-10 21:28:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-03-10 21:28:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-03-10 21:28:27,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-03-10 21:28:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:27,598 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-03-10 21:28:27,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-03-10 21:28:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:28:27,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:27,598 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:27,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:28:27,598 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2042651181, now seen corresponding path program 1 times [2021-03-10 21:28:27,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:27,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546994881] [2021-03-10 21:28:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:27,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546994881] [2021-03-10 21:28:27,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95030843] [2021-03-10 21:28:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:27,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:27,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:28:27,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:27,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:27,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:27,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 21:28:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:27,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:27,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 21:28:27,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011542208] [2021-03-10 21:28:27,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:27,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:27,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:27,816 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:27,860 INFO L93 Difference]: Finished difference Result 32 states and 58 transitions. [2021-03-10 21:28:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:28:27,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:28:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:27,861 INFO L225 Difference]: With dead ends: 32 [2021-03-10 21:28:27,861 INFO L226 Difference]: Without dead ends: 27 [2021-03-10 21:28:27,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-03-10 21:28:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-03-10 21:28:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2021-03-10 21:28:27,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 11 [2021-03-10 21:28:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:27,864 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2021-03-10 21:28:27,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2021-03-10 21:28:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:28:27,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:27,864 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:28,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 21:28:28,080 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash -413298669, now seen corresponding path program 2 times [2021-03-10 21:28:28,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:28,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219793613] [2021-03-10 21:28:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219793613] [2021-03-10 21:28:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997135207] [2021-03-10 21:28:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:28,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:28:28,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:28,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:28,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:28,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 21:28:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:28,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:28,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 21:28:28,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760684299] [2021-03-10 21:28:28,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:28,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:28,199 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:28,244 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-03-10 21:28:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:28:28,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:28:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:28,245 INFO L225 Difference]: With dead ends: 43 [2021-03-10 21:28:28,245 INFO L226 Difference]: Without dead ends: 38 [2021-03-10 21:28:28,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-03-10 21:28:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-03-10 21:28:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-03-10 21:28:28,249 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-03-10 21:28:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:28,249 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-03-10 21:28:28,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-03-10 21:28:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:28:28,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:28,250 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:28,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:28,463 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2049322798, now seen corresponding path program 1 times [2021-03-10 21:28:28,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:28,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350791548] [2021-03-10 21:28:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:28,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350791548] [2021-03-10 21:28:28,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:28,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:28:28,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765240583] [2021-03-10 21:28:28,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:28:28,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:28,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:28:28,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:28:28,487 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:28,502 INFO L93 Difference]: Finished difference Result 30 states and 55 transitions. [2021-03-10 21:28:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:28:28,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:28:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:28,503 INFO L225 Difference]: With dead ends: 30 [2021-03-10 21:28:28,503 INFO L226 Difference]: Without dead ends: 30 [2021-03-10 21:28:28,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:28:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-03-10 21:28:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-03-10 21:28:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-03-10 21:28:28,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-03-10 21:28:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:28,506 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-03-10 21:28:28,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-03-10 21:28:28,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:28,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:28,507 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:28,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:28:28,507 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash 268202073, now seen corresponding path program 3 times [2021-03-10 21:28:28,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:28,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561242810] [2021-03-10 21:28:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:28,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561242810] [2021-03-10 21:28:28,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234084993] [2021-03-10 21:28:28,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:28,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:28:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:28:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:28,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:28,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:28:28,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608368548] [2021-03-10 21:28:28,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:28,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:28,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:28,610 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:28,642 INFO L93 Difference]: Finished difference Result 51 states and 85 transitions. [2021-03-10 21:28:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:28:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:28,646 INFO L225 Difference]: With dead ends: 51 [2021-03-10 21:28:28,646 INFO L226 Difference]: Without dead ends: 51 [2021-03-10 21:28:28,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-03-10 21:28:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2021-03-10 21:28:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 54 transitions. [2021-03-10 21:28:28,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 54 transitions. Word has length 12 [2021-03-10 21:28:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:28,649 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 54 transitions. [2021-03-10 21:28:28,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 54 transitions. [2021-03-10 21:28:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:28,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:28,649 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:28,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:28,863 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1927934254, now seen corresponding path program 1 times [2021-03-10 21:28:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:28,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557696531] [2021-03-10 21:28:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:28,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557696531] [2021-03-10 21:28:28,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741599879] [2021-03-10 21:28:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:28:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:28,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:28,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:28:28,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885781223] [2021-03-10 21:28:28,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:28,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:28,928 INFO L87 Difference]: Start difference. First operand 28 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:28,978 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-03-10 21:28:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:28:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:28,981 INFO L225 Difference]: With dead ends: 57 [2021-03-10 21:28:28,982 INFO L226 Difference]: Without dead ends: 54 [2021-03-10 21:28:28,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-03-10 21:28:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2021-03-10 21:28:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-03-10 21:28:28,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 12 [2021-03-10 21:28:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:28,991 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-03-10 21:28:28,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-03-10 21:28:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:28,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:28,991 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:29,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:29,208 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:29,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1897554585, now seen corresponding path program 4 times [2021-03-10 21:28:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:29,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119638264] [2021-03-10 21:28:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119638264] [2021-03-10 21:28:29,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645671364] [2021-03-10 21:28:29,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:29,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:28:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:29,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:28:29,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112292743] [2021-03-10 21:28:29,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:29,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:29,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:29,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:29,276 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:29,310 INFO L93 Difference]: Finished difference Result 43 states and 76 transitions. [2021-03-10 21:28:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:28:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:28:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:29,311 INFO L225 Difference]: With dead ends: 43 [2021-03-10 21:28:29,311 INFO L226 Difference]: Without dead ends: 41 [2021-03-10 21:28:29,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-03-10 21:28:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-03-10 21:28:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 62 transitions. [2021-03-10 21:28:29,313 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 62 transitions. Word has length 12 [2021-03-10 21:28:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:29,313 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 62 transitions. [2021-03-10 21:28:29,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 62 transitions. [2021-03-10 21:28:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:29,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:29,314 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:29,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 21:28:29,514 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:29,515 INFO L82 PathProgramCache]: Analyzing trace with hash 261530456, now seen corresponding path program 2 times [2021-03-10 21:28:29,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:29,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713575436] [2021-03-10 21:28:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713575436] [2021-03-10 21:28:29,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557134282] [2021-03-10 21:28:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:29,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:28:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:29,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:28:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252561385] [2021-03-10 21:28:29,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:29,602 INFO L87 Difference]: Start difference. First operand 32 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:29,637 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2021-03-10 21:28:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:28:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:29,638 INFO L225 Difference]: With dead ends: 45 [2021-03-10 21:28:29,638 INFO L226 Difference]: Without dead ends: 45 [2021-03-10 21:28:29,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-10 21:28:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-03-10 21:28:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-03-10 21:28:29,640 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-03-10 21:28:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:29,640 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-03-10 21:28:29,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-03-10 21:28:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:29,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:29,641 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:29,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:29,847 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:29,847 INFO L82 PathProgramCache]: Analyzing trace with hash -905381939, now seen corresponding path program 5 times [2021-03-10 21:28:29,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:29,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151651924] [2021-03-10 21:28:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151651924] [2021-03-10 21:28:29,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:29,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:28:29,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398113766] [2021-03-10 21:28:29,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:28:29,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:28:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:29,875 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:29,894 INFO L93 Difference]: Finished difference Result 33 states and 59 transitions. [2021-03-10 21:28:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:28:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:28:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:29,894 INFO L225 Difference]: With dead ends: 33 [2021-03-10 21:28:29,895 INFO L226 Difference]: Without dead ends: 29 [2021-03-10 21:28:29,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-03-10 21:28:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-03-10 21:28:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-03-10 21:28:29,898 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-03-10 21:28:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:29,898 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-03-10 21:28:29,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-03-10 21:28:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:29,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:29,898 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:29,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 21:28:29,898 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1796703570, now seen corresponding path program 3 times [2021-03-10 21:28:29,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:29,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732589927] [2021-03-10 21:28:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732589927] [2021-03-10 21:28:29,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565547261] [2021-03-10 21:28:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:29,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:28:29,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:29,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:28:29,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782673418] [2021-03-10 21:28:29,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:29,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:29,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:29,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:29,981 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:30,017 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-03-10 21:28:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:28:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:30,018 INFO L225 Difference]: With dead ends: 40 [2021-03-10 21:28:30,018 INFO L226 Difference]: Without dead ends: 40 [2021-03-10 21:28:30,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-03-10 21:28:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-03-10 21:28:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-03-10 21:28:30,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 12 [2021-03-10 21:28:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:30,020 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-03-10 21:28:30,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-03-10 21:28:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:30,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:30,020 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:30,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 21:28:30,235 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:30,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:30,236 INFO L82 PathProgramCache]: Analyzing trace with hash 549941096, now seen corresponding path program 4 times [2021-03-10 21:28:30,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:30,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017732062] [2021-03-10 21:28:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:30,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017732062] [2021-03-10 21:28:30,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047569629] [2021-03-10 21:28:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:30,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:30,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:30,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:30,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:30,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:30,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:30,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:28:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:30,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:30,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:30,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067457689] [2021-03-10 21:28:30,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:30,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:30,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:30,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:30,445 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:30,516 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2021-03-10 21:28:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:30,516 INFO L225 Difference]: With dead ends: 48 [2021-03-10 21:28:30,516 INFO L226 Difference]: Without dead ends: 38 [2021-03-10 21:28:30,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-03-10 21:28:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-03-10 21:28:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 67 transitions. [2021-03-10 21:28:30,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 67 transitions. Word has length 13 [2021-03-10 21:28:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 67 transitions. [2021-03-10 21:28:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 67 transitions. [2021-03-10 21:28:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:30,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:30,522 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:30,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:28:30,731 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1116462702, now seen corresponding path program 5 times [2021-03-10 21:28:30,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:30,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431518405] [2021-03-10 21:28:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:30,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431518405] [2021-03-10 21:28:30,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606116014] [2021-03-10 21:28:30,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:30,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:30,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:30,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:30,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:30,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:30,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:30,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:28:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:30,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:30,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:30,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867204474] [2021-03-10 21:28:30,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:30,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:30,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:30,955 INFO L87 Difference]: Start difference. First operand 35 states and 67 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:31,085 INFO L93 Difference]: Finished difference Result 59 states and 114 transitions. [2021-03-10 21:28:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:31,086 INFO L225 Difference]: With dead ends: 59 [2021-03-10 21:28:31,086 INFO L226 Difference]: Without dead ends: 45 [2021-03-10 21:28:31,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-10 21:28:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-03-10 21:28:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-03-10 21:28:31,089 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-03-10 21:28:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:31,089 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-03-10 21:28:31,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-03-10 21:28:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:31,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:31,089 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:31,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:28:31,303 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -257588172, now seen corresponding path program 6 times [2021-03-10 21:28:31,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:31,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236221104] [2021-03-10 21:28:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:31,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236221104] [2021-03-10 21:28:31,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119089596] [2021-03-10 21:28:31,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:31,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:28:31,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:31,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:31,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:28:31,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:31,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:31,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:31,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:31,557 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:31,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:31,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-03-10 21:28:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:31,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:31,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:31,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356736599] [2021-03-10 21:28:31,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:31,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:31,583 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:31,708 INFO L93 Difference]: Finished difference Result 76 states and 152 transitions. [2021-03-10 21:28:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:28:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:31,710 INFO L225 Difference]: With dead ends: 76 [2021-03-10 21:28:31,710 INFO L226 Difference]: Without dead ends: 66 [2021-03-10 21:28:31,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-03-10 21:28:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2021-03-10 21:28:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-03-10 21:28:31,719 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-03-10 21:28:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:31,719 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-03-10 21:28:31,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-03-10 21:28:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:31,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:31,721 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:31,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:31,935 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1120270568, now seen corresponding path program 7 times [2021-03-10 21:28:31,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:31,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290482927] [2021-03-10 21:28:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:31,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290482927] [2021-03-10 21:28:31,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26184510] [2021-03-10 21:28:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:32,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:32,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:32,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:32,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:32,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:32,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:28:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:32,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:32,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:32,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168115833] [2021-03-10 21:28:32,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:32,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:32,103 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:32,228 INFO L93 Difference]: Finished difference Result 61 states and 123 transitions. [2021-03-10 21:28:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:32,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:32,229 INFO L225 Difference]: With dead ends: 61 [2021-03-10 21:28:32,229 INFO L226 Difference]: Without dead ends: 47 [2021-03-10 21:28:32,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-03-10 21:28:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-03-10 21:28:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 95 transitions. [2021-03-10 21:28:32,231 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 95 transitions. Word has length 13 [2021-03-10 21:28:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:32,231 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 95 transitions. [2021-03-10 21:28:32,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 95 transitions. [2021-03-10 21:28:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:32,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:32,231 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:32,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:28:32,438 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1979145098, now seen corresponding path program 8 times [2021-03-10 21:28:32,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:32,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335319686] [2021-03-10 21:28:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:32,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335319686] [2021-03-10 21:28:32,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710540487] [2021-03-10 21:28:32,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:32,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:32,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:32,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:32,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:28:32,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:32,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:32,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:32,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:32,599 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:32,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:32,600 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-03-10 21:28:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:32,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:32,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:32,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338639914] [2021-03-10 21:28:32,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:32,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:32,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:32,621 INFO L87 Difference]: Start difference. First operand 43 states and 95 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:32,757 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-03-10 21:28:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:32,762 INFO L225 Difference]: With dead ends: 84 [2021-03-10 21:28:32,762 INFO L226 Difference]: Without dead ends: 67 [2021-03-10 21:28:32,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-03-10 21:28:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-03-10 21:28:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-03-10 21:28:32,764 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-03-10 21:28:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:32,764 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-03-10 21:28:32,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-03-10 21:28:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:32,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:32,765 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:32,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:28:32,975 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:32,975 INFO L82 PathProgramCache]: Analyzing trace with hash -605208890, now seen corresponding path program 9 times [2021-03-10 21:28:32,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:32,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446523341] [2021-03-10 21:28:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:33,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446523341] [2021-03-10 21:28:33,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900326007] [2021-03-10 21:28:33,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:33,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:33,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:33,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:33,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:33,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:33,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:28:33,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:33,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:33,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:33,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:33,150 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:33,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:33,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-03-10 21:28:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:33,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:33,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:33,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940073957] [2021-03-10 21:28:33,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:33,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:33,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:33,175 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:33,319 INFO L93 Difference]: Finished difference Result 64 states and 135 transitions. [2021-03-10 21:28:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:33,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:33,320 INFO L225 Difference]: With dead ends: 64 [2021-03-10 21:28:33,320 INFO L226 Difference]: Without dead ends: 59 [2021-03-10 21:28:33,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:33,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-03-10 21:28:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2021-03-10 21:28:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-03-10 21:28:33,328 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-03-10 21:28:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:33,329 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-03-10 21:28:33,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-03-10 21:28:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:33,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:33,329 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:33,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:28:33,531 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1739525202, now seen corresponding path program 10 times [2021-03-10 21:28:33,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:33,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779976349] [2021-03-10 21:28:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:33,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779976349] [2021-03-10 21:28:33,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370775084] [2021-03-10 21:28:33,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:33,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:33,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:33,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:33,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:33,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:33,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:33,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:33,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:28:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:33,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:33,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109372934] [2021-03-10 21:28:33,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:33,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:33,715 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:33,835 INFO L93 Difference]: Finished difference Result 67 states and 142 transitions. [2021-03-10 21:28:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:33,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:33,836 INFO L225 Difference]: With dead ends: 67 [2021-03-10 21:28:33,836 INFO L226 Difference]: Without dead ends: 53 [2021-03-10 21:28:33,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-03-10 21:28:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-03-10 21:28:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-03-10 21:28:33,839 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-03-10 21:28:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:33,839 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-03-10 21:28:33,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-03-10 21:28:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:33,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:33,840 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:34,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:34,051 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:34,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1696567564, now seen corresponding path program 11 times [2021-03-10 21:28:34,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:34,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097637943] [2021-03-10 21:28:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:34,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097637943] [2021-03-10 21:28:34,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194744751] [2021-03-10 21:28:34,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:34,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:28:34,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:34,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:34,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:28:34,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:34,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:34,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:34,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:34,241 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:34,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:34,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-03-10 21:28:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:34,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:34,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:34,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397698182] [2021-03-10 21:28:34,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:34,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:34,264 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:34,430 INFO L93 Difference]: Finished difference Result 89 states and 192 transitions. [2021-03-10 21:28:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:28:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:34,431 INFO L225 Difference]: With dead ends: 89 [2021-03-10 21:28:34,431 INFO L226 Difference]: Without dead ends: 79 [2021-03-10 21:28:34,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-10 21:28:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2021-03-10 21:28:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-03-10 21:28:34,436 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-03-10 21:28:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:34,436 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-03-10 21:28:34,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-03-10 21:28:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:34,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:34,438 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:34,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 21:28:34,651 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash 14045744, now seen corresponding path program 12 times [2021-03-10 21:28:34,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:34,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743288943] [2021-03-10 21:28:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:34,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743288943] [2021-03-10 21:28:34,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300117795] [2021-03-10 21:28:34,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:34,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:28:34,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:34,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:34,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:34,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:34,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:28:34,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:34,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:34,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:34,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:34,819 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:28:34,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:34,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-03-10 21:28:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:34,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:34,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:34,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976870845] [2021-03-10 21:28:34,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:34,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:34,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:34,849 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:35,027 INFO L93 Difference]: Finished difference Result 72 states and 158 transitions. [2021-03-10 21:28:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:35,029 INFO L225 Difference]: With dead ends: 72 [2021-03-10 21:28:35,029 INFO L226 Difference]: Without dead ends: 67 [2021-03-10 21:28:35,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-03-10 21:28:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-03-10 21:28:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-03-10 21:28:35,031 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-03-10 21:28:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:35,031 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-03-10 21:28:35,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-03-10 21:28:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:35,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:35,031 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:35,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:35,239 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:35,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1503450740, now seen corresponding path program 13 times [2021-03-10 21:28:35,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:35,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343569931] [2021-03-10 21:28:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343569931] [2021-03-10 21:28:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795095426] [2021-03-10 21:28:35,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:28:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:35,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:28:35,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:35,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:35,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:28:35,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:35,431 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:35,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:35,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-03-10 21:28:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:35,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:35,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436697094] [2021-03-10 21:28:35,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:35,466 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:35,641 INFO L93 Difference]: Finished difference Result 77 states and 171 transitions. [2021-03-10 21:28:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:28:35,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:28:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:35,642 INFO L225 Difference]: With dead ends: 77 [2021-03-10 21:28:35,642 INFO L226 Difference]: Without dead ends: 72 [2021-03-10 21:28:35,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-03-10 21:28:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-03-10 21:28:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 114 transitions. [2021-03-10 21:28:35,644 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 114 transitions. Word has length 13 [2021-03-10 21:28:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:35,644 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 114 transitions. [2021-03-10 21:28:35,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 114 transitions. [2021-03-10 21:28:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:35,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:35,644 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:35,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:35,863 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 781826158, now seen corresponding path program 14 times [2021-03-10 21:28:35,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:35,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482498090] [2021-03-10 21:28:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:35,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482498090] [2021-03-10 21:28:35,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820065513] [2021-03-10 21:28:35,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:35,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:35,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:35,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:36,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:36,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:36,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:36,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:36,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:36,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:36,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:36,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:36,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946373559] [2021-03-10 21:28:36,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:36,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:36,041 INFO L87 Difference]: Start difference. First operand 50 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:36,144 INFO L93 Difference]: Finished difference Result 68 states and 151 transitions. [2021-03-10 21:28:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:28:36,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:36,145 INFO L225 Difference]: With dead ends: 68 [2021-03-10 21:28:36,145 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 21:28:36,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 21:28:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-03-10 21:28:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-03-10 21:28:36,146 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-03-10 21:28:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:36,146 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-03-10 21:28:36,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-03-10 21:28:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:36,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:36,147 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:36,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 21:28:36,357 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1352155630, now seen corresponding path program 15 times [2021-03-10 21:28:36,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:36,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460004172] [2021-03-10 21:28:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:36,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460004172] [2021-03-10 21:28:36,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569664387] [2021-03-10 21:28:36,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:36,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:36,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:36,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:36,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:36,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:36,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:36,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:36,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:36,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:36,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:36,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:36,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369175730] [2021-03-10 21:28:36,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:36,515 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:36,635 INFO L93 Difference]: Finished difference Result 91 states and 189 transitions. [2021-03-10 21:28:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:28:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:36,636 INFO L225 Difference]: With dead ends: 91 [2021-03-10 21:28:36,636 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 21:28:36,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:28:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 21:28:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-03-10 21:28:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-03-10 21:28:36,638 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-03-10 21:28:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:36,639 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-03-10 21:28:36,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-03-10 21:28:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:36,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:36,639 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:36,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:36,847 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash -373323828, now seen corresponding path program 16 times [2021-03-10 21:28:36,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:36,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613886614] [2021-03-10 21:28:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:36,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613886614] [2021-03-10 21:28:36,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338943113] [2021-03-10 21:28:36,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:36,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:36,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:37,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:37,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:37,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:37,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:37,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:37,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:37,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:37,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:37,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643142520] [2021-03-10 21:28:37,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:37,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:37,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:37,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:37,016 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:37,171 INFO L93 Difference]: Finished difference Result 91 states and 193 transitions. [2021-03-10 21:28:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:28:37,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:37,171 INFO L225 Difference]: With dead ends: 91 [2021-03-10 21:28:37,171 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 21:28:37,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:28:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 21:28:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-03-10 21:28:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-03-10 21:28:37,173 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 14 [2021-03-10 21:28:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:37,173 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-03-10 21:28:37,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-03-10 21:28:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:37,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:37,174 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:37,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 21:28:37,379 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:37,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2009347957, now seen corresponding path program 17 times [2021-03-10 21:28:37,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:37,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499846921] [2021-03-10 21:28:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:37,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499846921] [2021-03-10 21:28:37,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224155964] [2021-03-10 21:28:37,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:37,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:28:37,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:28:37,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:37,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:37,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:28:37,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995645474] [2021-03-10 21:28:37,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:37,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:37,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:37,452 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:37,481 INFO L93 Difference]: Finished difference Result 121 states and 238 transitions. [2021-03-10 21:28:37,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:28:37,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:37,482 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:28:37,482 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 21:28:37,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 21:28:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 62. [2021-03-10 21:28:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-03-10 21:28:37,485 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-03-10 21:28:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:37,486 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-03-10 21:28:37,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-03-10 21:28:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:37,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:37,486 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:37,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:37,699 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1971410264, now seen corresponding path program 18 times [2021-03-10 21:28:37,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:37,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933094636] [2021-03-10 21:28:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933094636] [2021-03-10 21:28:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440071593] [2021-03-10 21:28:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:37,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:28:37,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:37,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:37,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:37,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:37,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:37,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:37,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:37,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:37,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209883569] [2021-03-10 21:28:37,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:37,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:37,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:37,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:37,852 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:37,995 INFO L93 Difference]: Finished difference Result 85 states and 189 transitions. [2021-03-10 21:28:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:28:37,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:37,996 INFO L225 Difference]: With dead ends: 85 [2021-03-10 21:28:37,996 INFO L226 Difference]: Without dead ends: 80 [2021-03-10 21:28:37,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:28:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-03-10 21:28:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-03-10 21:28:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-03-10 21:28:37,998 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-03-10 21:28:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:37,998 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-03-10 21:28:37,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-03-10 21:28:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:37,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:37,998 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:38,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:38,198 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash 245930806, now seen corresponding path program 19 times [2021-03-10 21:28:38,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:38,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125138303] [2021-03-10 21:28:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125138303] [2021-03-10 21:28:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181421959] [2021-03-10 21:28:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:38,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:38,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:38,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:38,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:38,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:38,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:38,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:38,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:38,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430396209] [2021-03-10 21:28:38,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:38,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:38,354 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:38,464 INFO L93 Difference]: Finished difference Result 88 states and 187 transitions. [2021-03-10 21:28:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:38,464 INFO L225 Difference]: With dead ends: 88 [2021-03-10 21:28:38,464 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 21:28:38,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 21:28:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2021-03-10 21:28:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-03-10 21:28:38,466 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-03-10 21:28:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:38,466 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-03-10 21:28:38,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-03-10 21:28:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:38,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:38,468 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:38,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 21:28:38,679 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:38,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1735335802, now seen corresponding path program 20 times [2021-03-10 21:28:38,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:38,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230924267] [2021-03-10 21:28:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:38,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230924267] [2021-03-10 21:28:38,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406244011] [2021-03-10 21:28:38,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:38,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:38,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:38,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:38,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:38,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:38,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:38,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:38,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:38,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:38,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:38,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:38,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583792640] [2021-03-10 21:28:38,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:38,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:38,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:38,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:38,855 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:38,968 INFO L93 Difference]: Finished difference Result 100 states and 215 transitions. [2021-03-10 21:28:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:38,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:38,970 INFO L225 Difference]: With dead ends: 100 [2021-03-10 21:28:38,970 INFO L226 Difference]: Without dead ends: 95 [2021-03-10 21:28:38,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-03-10 21:28:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-03-10 21:28:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-03-10 21:28:38,971 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-03-10 21:28:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:38,971 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-03-10 21:28:38,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-03-10 21:28:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:38,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:38,972 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:39,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:39,186 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash 844014171, now seen corresponding path program 21 times [2021-03-10 21:28:39,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:39,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742968841] [2021-03-10 21:28:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:39,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742968841] [2021-03-10 21:28:39,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598383663] [2021-03-10 21:28:39,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:39,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:39,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:28:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:39,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:39,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:28:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953490819] [2021-03-10 21:28:39,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:39,253 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:39,299 INFO L93 Difference]: Finished difference Result 145 states and 286 transitions. [2021-03-10 21:28:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:28:39,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:39,300 INFO L225 Difference]: With dead ends: 145 [2021-03-10 21:28:39,300 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 21:28:39,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:28:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 21:28:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 68. [2021-03-10 21:28:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-03-10 21:28:39,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-03-10 21:28:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:39,302 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-03-10 21:28:39,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-03-10 21:28:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:39,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:39,302 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:39,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 21:28:39,517 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash -306532562, now seen corresponding path program 22 times [2021-03-10 21:28:39,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:39,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611737183] [2021-03-10 21:28:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:39,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611737183] [2021-03-10 21:28:39,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281224481] [2021-03-10 21:28:39,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:39,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:39,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:39,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:39,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:39,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:39,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:39,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:39,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:39,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:39,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:39,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499339091] [2021-03-10 21:28:39,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:39,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:39,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:39,672 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:39,792 INFO L93 Difference]: Finished difference Result 86 states and 210 transitions. [2021-03-10 21:28:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:39,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:39,792 INFO L225 Difference]: With dead ends: 86 [2021-03-10 21:28:39,792 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 21:28:39,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:28:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 21:28:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-03-10 21:28:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-03-10 21:28:39,794 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-03-10 21:28:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:39,794 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-03-10 21:28:39,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-03-10 21:28:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:39,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:39,795 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:40,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 21:28:40,003 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2032012020, now seen corresponding path program 23 times [2021-03-10 21:28:40,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:40,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533768184] [2021-03-10 21:28:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533768184] [2021-03-10 21:28:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181844666] [2021-03-10 21:28:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:40,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:28:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:40,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:40,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:40,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:40,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:40,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:40,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:40,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:40,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:40,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:40,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564267144] [2021-03-10 21:28:40,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:40,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:40,162 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:40,245 INFO L93 Difference]: Finished difference Result 95 states and 213 transitions. [2021-03-10 21:28:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:40,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:40,245 INFO L225 Difference]: With dead ends: 95 [2021-03-10 21:28:40,245 INFO L226 Difference]: Without dead ends: 90 [2021-03-10 21:28:40,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-03-10 21:28:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-03-10 21:28:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-03-10 21:28:40,247 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-03-10 21:28:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:40,247 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-03-10 21:28:40,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:40,247 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-03-10 21:28:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:40,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:40,248 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:40,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 21:28:40,462 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash 626931147, now seen corresponding path program 24 times [2021-03-10 21:28:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:40,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656437114] [2021-03-10 21:28:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:40,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656437114] [2021-03-10 21:28:40,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575113695] [2021-03-10 21:28:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:40,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:28:40,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:28:40,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:40,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:40,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:28:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991668703] [2021-03-10 21:28:40,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:40,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:40,521 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:40,544 INFO L93 Difference]: Finished difference Result 127 states and 274 transitions. [2021-03-10 21:28:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:40,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:40,545 INFO L225 Difference]: With dead ends: 127 [2021-03-10 21:28:40,545 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:28:40,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:28:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2021-03-10 21:28:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-03-10 21:28:40,549 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-03-10 21:28:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:40,550 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-03-10 21:28:40,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-03-10 21:28:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:40,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:40,550 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:40,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:40,763 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash -542607024, now seen corresponding path program 25 times [2021-03-10 21:28:40,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:40,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81675774] [2021-03-10 21:28:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:40,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81675774] [2021-03-10 21:28:40,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3703383] [2021-03-10 21:28:40,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:40,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:40,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:40,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:40,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:40,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:40,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:40,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:40,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:40,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606713900] [2021-03-10 21:28:40,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:40,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:40,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:40,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:40,926 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:41,035 INFO L93 Difference]: Finished difference Result 108 states and 241 transitions. [2021-03-10 21:28:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:41,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:41,035 INFO L225 Difference]: With dead ends: 108 [2021-03-10 21:28:41,036 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:28:41,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:28:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-03-10 21:28:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-03-10 21:28:41,038 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-03-10 21:28:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:41,038 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-03-10 21:28:41,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-03-10 21:28:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:41,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:41,038 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:41,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:28:41,251 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1433928655, now seen corresponding path program 26 times [2021-03-10 21:28:41,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:41,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493459538] [2021-03-10 21:28:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:41,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493459538] [2021-03-10 21:28:41,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215167777] [2021-03-10 21:28:41,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:41,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:41,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:41,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:28:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:41,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:41,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:28:41,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169220597] [2021-03-10 21:28:41,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:41,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:41,318 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:41,368 INFO L93 Difference]: Finished difference Result 141 states and 294 transitions. [2021-03-10 21:28:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:41,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:41,370 INFO L225 Difference]: With dead ends: 141 [2021-03-10 21:28:41,370 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 21:28:41,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:28:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 21:28:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 73. [2021-03-10 21:28:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2021-03-10 21:28:41,373 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 14 [2021-03-10 21:28:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:41,373 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2021-03-10 21:28:41,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2021-03-10 21:28:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:41,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:41,373 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:41,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:41,579 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:41,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1615692404, now seen corresponding path program 27 times [2021-03-10 21:28:41,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:41,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500314768] [2021-03-10 21:28:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:41,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500314768] [2021-03-10 21:28:41,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560582072] [2021-03-10 21:28:41,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:41,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:41,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:41,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:41,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:28:41,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:41,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:41,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:41,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:41,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:41,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:28:41,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112307524] [2021-03-10 21:28:41,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:28:41,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:28:41,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:41,757 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:41,907 INFO L93 Difference]: Finished difference Result 126 states and 281 transitions. [2021-03-10 21:28:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:41,908 INFO L225 Difference]: With dead ends: 126 [2021-03-10 21:28:41,908 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 21:28:41,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:28:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 21:28:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2021-03-10 21:28:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5405405405405403) internal successors, (188), 74 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2021-03-10 21:28:41,910 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 14 [2021-03-10 21:28:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:41,910 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2021-03-10 21:28:41,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2021-03-10 21:28:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:41,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:41,911 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:42,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-10 21:28:42,111 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash -896073077, now seen corresponding path program 28 times [2021-03-10 21:28:42,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:42,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328020073] [2021-03-10 21:28:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:42,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328020073] [2021-03-10 21:28:42,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087944355] [2021-03-10 21:28:42,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:42,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:42,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:42,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:28:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:42,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:42,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:28:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623925455] [2021-03-10 21:28:42,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:42,178 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:42,232 INFO L93 Difference]: Finished difference Result 117 states and 263 transitions. [2021-03-10 21:28:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:28:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:28:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:42,232 INFO L225 Difference]: With dead ends: 117 [2021-03-10 21:28:42,233 INFO L226 Difference]: Without dead ends: 117 [2021-03-10 21:28:42,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-10 21:28:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2021-03-10 21:28:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 79 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-03-10 21:28:42,234 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 14 [2021-03-10 21:28:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:42,235 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-03-10 21:28:42,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-03-10 21:28:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:42,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:42,236 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:42,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 21:28:42,451 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:42,451 INFO L82 PathProgramCache]: Analyzing trace with hash -619671512, now seen corresponding path program 29 times [2021-03-10 21:28:42,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:42,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746459840] [2021-03-10 21:28:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:42,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746459840] [2021-03-10 21:28:42,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655131012] [2021-03-10 21:28:42,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:42,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:28:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:42,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:42,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:42,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842913093] [2021-03-10 21:28:42,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:42,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:42,527 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:42,599 INFO L93 Difference]: Finished difference Result 152 states and 318 transitions. [2021-03-10 21:28:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:28:42,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:42,602 INFO L225 Difference]: With dead ends: 152 [2021-03-10 21:28:42,602 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 21:28:42,602 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 21:28:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-03-10 21:28:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.6463414634146343) internal successors, (217), 82 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 217 transitions. [2021-03-10 21:28:42,604 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 217 transitions. Word has length 15 [2021-03-10 21:28:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:42,604 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 217 transitions. [2021-03-10 21:28:42,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 217 transitions. [2021-03-10 21:28:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:42,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:42,605 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:42,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 21:28:42,819 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash -707581453, now seen corresponding path program 30 times [2021-03-10 21:28:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:42,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388645000] [2021-03-10 21:28:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:42,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388645000] [2021-03-10 21:28:42,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220787201] [2021-03-10 21:28:42,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:42,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:28:42,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:42,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:42,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:42,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924529303] [2021-03-10 21:28:42,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:42,884 INFO L87 Difference]: Start difference. First operand 83 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:42,977 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-03-10 21:28:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:42,980 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:28:42,980 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 21:28:42,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 21:28:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-03-10 21:28:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.640449438202247) internal successors, (235), 89 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 235 transitions. [2021-03-10 21:28:42,982 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 235 transitions. Word has length 15 [2021-03-10 21:28:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:42,982 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 235 transitions. [2021-03-10 21:28:42,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 235 transitions. [2021-03-10 21:28:42,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:42,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:42,982 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:43,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 21:28:43,191 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:43,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1774821498, now seen corresponding path program 31 times [2021-03-10 21:28:43,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:43,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540743577] [2021-03-10 21:28:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:43,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540743577] [2021-03-10 21:28:43,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534211146] [2021-03-10 21:28:43,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:43,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:43,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:43,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:28:43,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382307183] [2021-03-10 21:28:43,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:43,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:43,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:43,272 INFO L87 Difference]: Start difference. First operand 90 states and 235 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:43,324 INFO L93 Difference]: Finished difference Result 119 states and 275 transitions. [2021-03-10 21:28:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:43,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:43,325 INFO L225 Difference]: With dead ends: 119 [2021-03-10 21:28:43,325 INFO L226 Difference]: Without dead ends: 115 [2021-03-10 21:28:43,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:28:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-03-10 21:28:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-03-10 21:28:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 236 transitions. [2021-03-10 21:28:43,328 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 236 transitions. Word has length 15 [2021-03-10 21:28:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:43,328 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 236 transitions. [2021-03-10 21:28:43,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 236 transitions. [2021-03-10 21:28:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:43,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:43,328 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:43,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 21:28:43,536 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 884121669, now seen corresponding path program 32 times [2021-03-10 21:28:43,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:43,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604173909] [2021-03-10 21:28:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:43,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604173909] [2021-03-10 21:28:43,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065340397] [2021-03-10 21:28:43,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:43,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:43,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:43,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:43,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:43,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:28:43,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019954190] [2021-03-10 21:28:43,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:43,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:43,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:43,600 INFO L87 Difference]: Start difference. First operand 92 states and 236 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:43,631 INFO L93 Difference]: Finished difference Result 156 states and 331 transitions. [2021-03-10 21:28:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:43,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:43,632 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:28:43,632 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:28:43,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:28:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 89. [2021-03-10 21:28:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2021-03-10 21:28:43,634 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 15 [2021-03-10 21:28:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:43,634 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2021-03-10 21:28:43,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2021-03-10 21:28:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:43,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:43,634 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:43,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 21:28:43,847 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash 333838132, now seen corresponding path program 33 times [2021-03-10 21:28:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:43,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075727279] [2021-03-10 21:28:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:43,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075727279] [2021-03-10 21:28:43,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684768278] [2021-03-10 21:28:43,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:43,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:28:43,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:43,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:43,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:43,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313707066] [2021-03-10 21:28:43,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:43,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:43,913 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:43,951 INFO L93 Difference]: Finished difference Result 126 states and 290 transitions. [2021-03-10 21:28:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:43,952 INFO L225 Difference]: With dead ends: 126 [2021-03-10 21:28:43,952 INFO L226 Difference]: Without dead ends: 122 [2021-03-10 21:28:43,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:28:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-03-10 21:28:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2021-03-10 21:28:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-03-10 21:28:43,954 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-03-10 21:28:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:43,954 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-03-10 21:28:43,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-03-10 21:28:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:43,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:43,955 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:44,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-10 21:28:44,171 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash -557483499, now seen corresponding path program 34 times [2021-03-10 21:28:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:44,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633886530] [2021-03-10 21:28:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:44,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633886530] [2021-03-10 21:28:44,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843277178] [2021-03-10 21:28:44,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:44,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:44,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:44,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:44,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433727875] [2021-03-10 21:28:44,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:44,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:44,235 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:44,276 INFO L93 Difference]: Finished difference Result 160 states and 342 transitions. [2021-03-10 21:28:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:28:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:44,277 INFO L225 Difference]: With dead ends: 160 [2021-03-10 21:28:44,277 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 21:28:44,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:28:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 21:28:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 89. [2021-03-10 21:28:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-03-10 21:28:44,279 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-03-10 21:28:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:44,279 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-03-10 21:28:44,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-03-10 21:28:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:44,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:44,280 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:44,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-03-10 21:28:44,494 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1708030232, now seen corresponding path program 35 times [2021-03-10 21:28:44,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:44,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672939585] [2021-03-10 21:28:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:44,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672939585] [2021-03-10 21:28:44,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207537892] [2021-03-10 21:28:44,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:44,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:28:44,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:44,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:44,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:28:44,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710055790] [2021-03-10 21:28:44,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:44,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:44,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:44,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:44,555 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:44,581 INFO L93 Difference]: Finished difference Result 180 states and 397 transitions. [2021-03-10 21:28:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:28:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:44,582 INFO L225 Difference]: With dead ends: 180 [2021-03-10 21:28:44,582 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 21:28:44,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 21:28:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 97. [2021-03-10 21:28:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.6354166666666665) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 253 transitions. [2021-03-10 21:28:44,585 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 253 transitions. Word has length 15 [2021-03-10 21:28:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:44,586 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 253 transitions. [2021-03-10 21:28:44,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 253 transitions. [2021-03-10 21:28:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:44,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:44,586 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:44,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-10 21:28:44,801 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1809787465, now seen corresponding path program 36 times [2021-03-10 21:28:44,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:44,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482254463] [2021-03-10 21:28:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:44,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482254463] [2021-03-10 21:28:44,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424167596] [2021-03-10 21:28:44,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:44,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:28:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:44,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:44,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:44,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:28:44,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781176259] [2021-03-10 21:28:44,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:44,868 INFO L87 Difference]: Start difference. First operand 97 states and 253 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:44,918 INFO L93 Difference]: Finished difference Result 152 states and 341 transitions. [2021-03-10 21:28:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:28:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:44,919 INFO L225 Difference]: With dead ends: 152 [2021-03-10 21:28:44,919 INFO L226 Difference]: Without dead ends: 150 [2021-03-10 21:28:44,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-03-10 21:28:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2021-03-10 21:28:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.676470588235294) internal successors, (273), 102 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 273 transitions. [2021-03-10 21:28:44,921 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 273 transitions. Word has length 15 [2021-03-10 21:28:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:44,921 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 273 transitions. [2021-03-10 21:28:44,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 273 transitions. [2021-03-10 21:28:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:44,921 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:44,921 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:45,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:45,122 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104694, now seen corresponding path program 37 times [2021-03-10 21:28:45,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:45,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046002204] [2021-03-10 21:28:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:45,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046002204] [2021-03-10 21:28:45,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037490125] [2021-03-10 21:28:45,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:45,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:45,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:45,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:45,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825717922] [2021-03-10 21:28:45,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:45,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:45,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:45,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:45,182 INFO L87 Difference]: Start difference. First operand 103 states and 273 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:45,249 INFO L93 Difference]: Finished difference Result 161 states and 375 transitions. [2021-03-10 21:28:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:45,249 INFO L225 Difference]: With dead ends: 161 [2021-03-10 21:28:45,249 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 21:28:45,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:28:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 21:28:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 105. [2021-03-10 21:28:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6538461538461537) internal successors, (276), 104 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 276 transitions. [2021-03-10 21:28:45,252 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 276 transitions. Word has length 15 [2021-03-10 21:28:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:45,252 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 276 transitions. [2021-03-10 21:28:45,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 276 transitions. [2021-03-10 21:28:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:45,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:45,252 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:45,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:45,466 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1459540971, now seen corresponding path program 38 times [2021-03-10 21:28:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:45,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498426842] [2021-03-10 21:28:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:45,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498426842] [2021-03-10 21:28:45,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135388369] [2021-03-10 21:28:45,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:45,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:45,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:45,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:45,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:45,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250314024] [2021-03-10 21:28:45,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:45,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:45,526 INFO L87 Difference]: Start difference. First operand 105 states and 276 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:45,566 INFO L93 Difference]: Finished difference Result 156 states and 350 transitions. [2021-03-10 21:28:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:45,567 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:28:45,567 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:28:45,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:28:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:28:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2021-03-10 21:28:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.6020408163265305) internal successors, (255), 98 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2021-03-10 21:28:45,569 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 15 [2021-03-10 21:28:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:45,569 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2021-03-10 21:28:45,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2021-03-10 21:28:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:45,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:45,570 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:45,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:45,783 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1277777222, now seen corresponding path program 39 times [2021-03-10 21:28:45,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:45,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916598416] [2021-03-10 21:28:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:45,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916598416] [2021-03-10 21:28:45,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702303933] [2021-03-10 21:28:45,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:45,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:45,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:45,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:45,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:45,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:45,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923544900] [2021-03-10 21:28:45,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:45,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:45,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:45,864 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:45,924 INFO L93 Difference]: Finished difference Result 165 states and 373 transitions. [2021-03-10 21:28:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:28:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:45,925 INFO L225 Difference]: With dead ends: 165 [2021-03-10 21:28:45,925 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:28:45,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:28:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2021-03-10 21:28:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.5686274509803924) internal successors, (262), 102 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2021-03-10 21:28:45,927 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 15 [2021-03-10 21:28:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:45,927 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2021-03-10 21:28:45,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2021-03-10 21:28:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:45,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:45,927 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:46,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 21:28:46,142 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1997396549, now seen corresponding path program 40 times [2021-03-10 21:28:46,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:46,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927338140] [2021-03-10 21:28:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927338140] [2021-03-10 21:28:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668215459] [2021-03-10 21:28:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:46,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:46,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:46,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:46,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:46,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594943666] [2021-03-10 21:28:46,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:46,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:46,228 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:46,308 INFO L93 Difference]: Finished difference Result 164 states and 357 transitions. [2021-03-10 21:28:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:46,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:46,309 INFO L225 Difference]: With dead ends: 164 [2021-03-10 21:28:46,309 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 21:28:46,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 21:28:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-03-10 21:28:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.56) internal successors, (256), 100 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2021-03-10 21:28:46,311 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 15 [2021-03-10 21:28:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:46,311 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2021-03-10 21:28:46,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2021-03-10 21:28:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:46,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:46,312 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:46,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:28:46,523 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash 690186194, now seen corresponding path program 41 times [2021-03-10 21:28:46,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:46,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45792153] [2021-03-10 21:28:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:46,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45792153] [2021-03-10 21:28:46,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87132587] [2021-03-10 21:28:46,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:46,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:28:46,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:46,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:46,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:46,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74273468] [2021-03-10 21:28:46,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:46,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:46,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:46,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:46,595 INFO L87 Difference]: Start difference. First operand 101 states and 256 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:46,626 INFO L93 Difference]: Finished difference Result 205 states and 458 transitions. [2021-03-10 21:28:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:46,628 INFO L225 Difference]: With dead ends: 205 [2021-03-10 21:28:46,628 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 21:28:46,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 21:28:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 119. [2021-03-10 21:28:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.73728813559322) internal successors, (323), 118 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 323 transitions. [2021-03-10 21:28:46,630 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 323 transitions. Word has length 15 [2021-03-10 21:28:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:46,630 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 323 transitions. [2021-03-10 21:28:46,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 323 transitions. [2021-03-10 21:28:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:46,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:46,631 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:46,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:28:46,845 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:46,846 INFO L82 PathProgramCache]: Analyzing trace with hash -86963405, now seen corresponding path program 42 times [2021-03-10 21:28:46,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:46,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168815480] [2021-03-10 21:28:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:46,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168815480] [2021-03-10 21:28:46,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688574769] [2021-03-10 21:28:46,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:46,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:28:46,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:46,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:46,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:46,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:46,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005549083] [2021-03-10 21:28:46,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:46,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:46,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:46,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:46,913 INFO L87 Difference]: Start difference. First operand 119 states and 323 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:46,975 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2021-03-10 21:28:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:46,977 INFO L225 Difference]: With dead ends: 198 [2021-03-10 21:28:46,977 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 21:28:46,978 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:28:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 21:28:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2021-03-10 21:28:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.811023622047244) internal successors, (357), 127 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 357 transitions. [2021-03-10 21:28:46,980 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 357 transitions. Word has length 15 [2021-03-10 21:28:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:46,980 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 357 transitions. [2021-03-10 21:28:46,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 357 transitions. [2021-03-10 21:28:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:46,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:46,981 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:47,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 21:28:47,195 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1035293264, now seen corresponding path program 43 times [2021-03-10 21:28:47,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:47,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844177624] [2021-03-10 21:28:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:47,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844177624] [2021-03-10 21:28:47,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419915443] [2021-03-10 21:28:47,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:47,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:47,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:47,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:47,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:47,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033148279] [2021-03-10 21:28:47,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:47,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:47,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:47,254 INFO L87 Difference]: Start difference. First operand 128 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:47,321 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-03-10 21:28:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:47,323 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:28:47,323 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:28:47,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:28:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:28:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2021-03-10 21:28:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8031496062992125) internal successors, (356), 127 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 356 transitions. [2021-03-10 21:28:47,326 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 356 transitions. Word has length 15 [2021-03-10 21:28:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:47,326 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 356 transitions. [2021-03-10 21:28:47,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 356 transitions. [2021-03-10 21:28:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:47,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:47,326 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:47,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:47,539 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1623649903, now seen corresponding path program 44 times [2021-03-10 21:28:47,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:47,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219115298] [2021-03-10 21:28:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:47,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219115298] [2021-03-10 21:28:47,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256569163] [2021-03-10 21:28:47,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:47,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:47,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:47,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:47,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:47,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957080002] [2021-03-10 21:28:47,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:47,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:47,616 INFO L87 Difference]: Start difference. First operand 128 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:47,646 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2021-03-10 21:28:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:47,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:47,647 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:28:47,647 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:28:47,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:28:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-03-10 21:28:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.7890625) internal successors, (357), 128 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 357 transitions. [2021-03-10 21:28:47,649 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 357 transitions. Word has length 15 [2021-03-10 21:28:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:47,649 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 357 transitions. [2021-03-10 21:28:47,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 357 transitions. [2021-03-10 21:28:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:47,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:47,650 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:47,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 21:28:47,850 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash 454111732, now seen corresponding path program 45 times [2021-03-10 21:28:47,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:47,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770679982] [2021-03-10 21:28:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770679982] [2021-03-10 21:28:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338315693] [2021-03-10 21:28:47,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:47,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:47,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:47,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:47,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:47,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:47,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267144674] [2021-03-10 21:28:47,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:47,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:47,911 INFO L87 Difference]: Start difference. First operand 129 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:47,964 INFO L93 Difference]: Finished difference Result 215 states and 521 transitions. [2021-03-10 21:28:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:47,965 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:28:47,965 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:28:47,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:28:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:28:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 129. [2021-03-10 21:28:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.78125) internal successors, (356), 128 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 356 transitions. [2021-03-10 21:28:47,968 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 356 transitions. Word has length 15 [2021-03-10 21:28:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:47,968 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 356 transitions. [2021-03-10 21:28:47,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 356 transitions. [2021-03-10 21:28:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:47,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:47,969 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:48,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-10 21:28:48,183 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash -437209899, now seen corresponding path program 46 times [2021-03-10 21:28:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:48,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816956848] [2021-03-10 21:28:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:48,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816956848] [2021-03-10 21:28:48,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936811857] [2021-03-10 21:28:48,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:48,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:48,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:48,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:48,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:28:48,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180656642] [2021-03-10 21:28:48,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:28:48,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:48,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:28:48,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:48,257 INFO L87 Difference]: Start difference. First operand 129 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:48,290 INFO L93 Difference]: Finished difference Result 166 states and 422 transitions. [2021-03-10 21:28:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:48,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:48,291 INFO L225 Difference]: With dead ends: 166 [2021-03-10 21:28:48,291 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:28:48,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:28:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2021-03-10 21:28:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-03-10 21:28:48,293 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 15 [2021-03-10 21:28:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:48,294 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-03-10 21:28:48,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-03-10 21:28:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:48,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:48,294 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:48,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:48,509 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:48,509 INFO L82 PathProgramCache]: Analyzing trace with hash -618973648, now seen corresponding path program 47 times [2021-03-10 21:28:48,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:48,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661046888] [2021-03-10 21:28:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:48,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661046888] [2021-03-10 21:28:48,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78506067] [2021-03-10 21:28:48,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:48,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:28:48,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:48,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:48,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:48,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:48,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882012075] [2021-03-10 21:28:48,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:48,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:48,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:48,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:48,572 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:48,630 INFO L93 Difference]: Finished difference Result 217 states and 530 transitions. [2021-03-10 21:28:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:28:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:48,631 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:28:48,631 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:28:48,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:28:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:28:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-03-10 21:28:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-03-10 21:28:48,634 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-03-10 21:28:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:48,634 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-03-10 21:28:48,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-03-10 21:28:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:48,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:48,635 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:48,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:48,850 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:48,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:48,850 INFO L82 PathProgramCache]: Analyzing trace with hash 100645679, now seen corresponding path program 48 times [2021-03-10 21:28:48,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:48,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210795387] [2021-03-10 21:28:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:48,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210795387] [2021-03-10 21:28:48,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715012558] [2021-03-10 21:28:48,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:48,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:28:48,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:48,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:48,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:48,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644544330] [2021-03-10 21:28:48,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:48,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:48,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:48,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:48,929 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:48,990 INFO L93 Difference]: Finished difference Result 184 states and 467 transitions. [2021-03-10 21:28:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:28:48,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:48,991 INFO L225 Difference]: With dead ends: 184 [2021-03-10 21:28:48,991 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 21:28:48,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:28:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 21:28:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2021-03-10 21:28:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-03-10 21:28:48,993 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-03-10 21:28:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:48,993 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-03-10 21:28:48,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-03-10 21:28:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:48,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:48,994 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:49,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:49,207 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash 475117940, now seen corresponding path program 49 times [2021-03-10 21:28:49,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:49,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108186859] [2021-03-10 21:28:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:49,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108186859] [2021-03-10 21:28:49,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202223568] [2021-03-10 21:28:49,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:49,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:49,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:49,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:49,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449912030] [2021-03-10 21:28:49,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:49,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:49,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:49,272 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:49,311 INFO L93 Difference]: Finished difference Result 186 states and 481 transitions. [2021-03-10 21:28:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:49,312 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:28:49,312 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 21:28:49,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:28:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 21:28:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-03-10 21:28:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.841726618705036) internal successors, (395), 139 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 395 transitions. [2021-03-10 21:28:49,314 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 395 transitions. Word has length 15 [2021-03-10 21:28:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:49,314 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 395 transitions. [2021-03-10 21:28:49,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 395 transitions. [2021-03-10 21:28:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:28:49,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:49,315 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:49,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-03-10 21:28:49,529 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash -405700587, now seen corresponding path program 50 times [2021-03-10 21:28:49,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:49,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357949222] [2021-03-10 21:28:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:49,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357949222] [2021-03-10 21:28:49,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986188377] [2021-03-10 21:28:49,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:49,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:49,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:49,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:28:49,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:49,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:49,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:28:49,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945180393] [2021-03-10 21:28:49,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:49,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:49,596 INFO L87 Difference]: Start difference. First operand 140 states and 395 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:49,663 INFO L93 Difference]: Finished difference Result 189 states and 494 transitions. [2021-03-10 21:28:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:28:49,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:28:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:49,664 INFO L225 Difference]: With dead ends: 189 [2021-03-10 21:28:49,664 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:28:49,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:28:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2021-03-10 21:28:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.8299319727891157) internal successors, (416), 147 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 416 transitions. [2021-03-10 21:28:49,666 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 416 transitions. Word has length 15 [2021-03-10 21:28:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:49,666 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 416 transitions. [2021-03-10 21:28:49,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 416 transitions. [2021-03-10 21:28:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:49,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:49,667 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:49,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 21:28:49,881 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:49,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1204336263, now seen corresponding path program 51 times [2021-03-10 21:28:49,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:49,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855493732] [2021-03-10 21:28:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:49,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855493732] [2021-03-10 21:28:49,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937669555] [2021-03-10 21:28:49,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:49,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:49,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:50,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:50,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:50,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:50,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:50,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:50,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:28:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:50,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:50,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:28:50,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492379541] [2021-03-10 21:28:50,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:50,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:50,162 INFO L87 Difference]: Start difference. First operand 148 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:50,343 INFO L93 Difference]: Finished difference Result 205 states and 527 transitions. [2021-03-10 21:28:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:28:50,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:50,344 INFO L225 Difference]: With dead ends: 205 [2021-03-10 21:28:50,344 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 21:28:50,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:28:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 21:28:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 158. [2021-03-10 21:28:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8343949044585988) internal successors, (445), 157 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 445 transitions. [2021-03-10 21:28:50,347 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 445 transitions. Word has length 16 [2021-03-10 21:28:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:50,347 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 445 transitions. [2021-03-10 21:28:50,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 445 transitions. [2021-03-10 21:28:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:50,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:50,347 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:50,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-10 21:28:50,562 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:50,562 INFO L82 PathProgramCache]: Analyzing trace with hash 387366859, now seen corresponding path program 52 times [2021-03-10 21:28:50,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:50,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446735575] [2021-03-10 21:28:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:50,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446735575] [2021-03-10 21:28:50,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614865833] [2021-03-10 21:28:50,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:50,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:50,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:50,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:50,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:50,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:50,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:50,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:50,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:28:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:50,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:50,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:50,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382616840] [2021-03-10 21:28:50,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:50,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:50,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:50,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:50,814 INFO L87 Difference]: Start difference. First operand 158 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:50,988 INFO L93 Difference]: Finished difference Result 218 states and 567 transitions. [2021-03-10 21:28:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:28:50,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:50,989 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:28:50,989 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 21:28:50,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:28:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 21:28:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 169. [2021-03-10 21:28:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-03-10 21:28:50,992 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-03-10 21:28:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:50,992 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-03-10 21:28:50,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-03-10 21:28:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:50,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:50,992 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:51,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 21:28:51,195 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:51,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:51,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1246241389, now seen corresponding path program 53 times [2021-03-10 21:28:51,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:51,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894991102] [2021-03-10 21:28:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:51,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894991102] [2021-03-10 21:28:51,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947315548] [2021-03-10 21:28:51,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:51,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:28:51,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:51,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:51,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:51,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:51,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:51,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:51,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:51,565 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:51,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:51,579 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:51,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:51,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:51,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726953793] [2021-03-10 21:28:51,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:51,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:51,601 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:51,765 INFO L93 Difference]: Finished difference Result 234 states and 603 transitions. [2021-03-10 21:28:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:28:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:51,766 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:28:51,766 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:28:51,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:28:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:28:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 169. [2021-03-10 21:28:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-03-10 21:28:51,774 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-03-10 21:28:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:51,774 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-03-10 21:28:51,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-03-10 21:28:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:51,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:51,775 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:51,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:51,990 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1054238309, now seen corresponding path program 54 times [2021-03-10 21:28:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:51,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079075963] [2021-03-10 21:28:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:52,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079075963] [2021-03-10 21:28:52,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910858289] [2021-03-10 21:28:52,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:52,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:28:52,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:52,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:52,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:52,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:52,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:52,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:52,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:52,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:52,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:28:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:52,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:52,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:52,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082802539] [2021-03-10 21:28:52,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:52,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:52,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:52,244 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:52,386 INFO L93 Difference]: Finished difference Result 232 states and 635 transitions. [2021-03-10 21:28:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:28:52,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:52,387 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:28:52,387 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:28:52,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:28:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:28:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 188. [2021-03-10 21:28:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9411764705882355) internal successors, (550), 187 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 550 transitions. [2021-03-10 21:28:52,390 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 550 transitions. Word has length 16 [2021-03-10 21:28:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:52,390 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 550 transitions. [2021-03-10 21:28:52,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 550 transitions. [2021-03-10 21:28:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:52,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:52,390 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:52,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-03-10 21:28:52,603 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash -195363779, now seen corresponding path program 55 times [2021-03-10 21:28:52,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:52,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082242298] [2021-03-10 21:28:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082242298] [2021-03-10 21:28:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33639937] [2021-03-10 21:28:52,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:52,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:52,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:52,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:52,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:52,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:52,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:52,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:52,899 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:52,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:52,900 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:52,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:52,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:52,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533354739] [2021-03-10 21:28:52,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:52,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:52,923 INFO L87 Difference]: Start difference. First operand 188 states and 550 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:53,157 INFO L93 Difference]: Finished difference Result 263 states and 691 transitions. [2021-03-10 21:28:53,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:28:53,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:53,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:53,158 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:28:53,158 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:28:53,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:28:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:28:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-03-10 21:28:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.918918918918919) internal successors, (540), 185 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 540 transitions. [2021-03-10 21:28:53,161 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 540 transitions. Word has length 16 [2021-03-10 21:28:53,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:53,161 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 540 transitions. [2021-03-10 21:28:53,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 540 transitions. [2021-03-10 21:28:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:53,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:53,162 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:53,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:53,362 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:53,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1515249529, now seen corresponding path program 56 times [2021-03-10 21:28:53,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:53,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303563673] [2021-03-10 21:28:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:53,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303563673] [2021-03-10 21:28:53,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909540356] [2021-03-10 21:28:53,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:53,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:53,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:53,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:53,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:53,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:53,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:53,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:53,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:53,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:53,738 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:53,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:53,739 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:53,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:53,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:53,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885978361] [2021-03-10 21:28:53,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:53,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:53,767 INFO L87 Difference]: Start difference. First operand 186 states and 540 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:54,015 INFO L93 Difference]: Finished difference Result 229 states and 625 transitions. [2021-03-10 21:28:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:28:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:54,016 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:28:54,016 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:28:54,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:28:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-03-10 21:28:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9193548387096775) internal successors, (543), 186 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 543 transitions. [2021-03-10 21:28:54,020 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 543 transitions. Word has length 16 [2021-03-10 21:28:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:54,020 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 543 transitions. [2021-03-10 21:28:54,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 543 transitions. [2021-03-10 21:28:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:54,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:54,021 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:54,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:54,235 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1313032655, now seen corresponding path program 57 times [2021-03-10 21:28:54,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:54,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319205607] [2021-03-10 21:28:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:54,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319205607] [2021-03-10 21:28:54,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786019923] [2021-03-10 21:28:54,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:54,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:54,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:54,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:54,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:54,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:54,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:54,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:28:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:54,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:54,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:28:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652893985] [2021-03-10 21:28:54,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:28:54,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:28:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:28:54,469 INFO L87 Difference]: Start difference. First operand 187 states and 543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:54,619 INFO L93 Difference]: Finished difference Result 208 states and 572 transitions. [2021-03-10 21:28:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:28:54,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:54,620 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:28:54,620 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 21:28:54,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:28:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 21:28:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2021-03-10 21:28:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-03-10 21:28:54,623 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 16 [2021-03-10 21:28:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:54,623 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-03-10 21:28:54,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-03-10 21:28:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:54,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:54,623 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:54,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:54,838 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:54,838 INFO L82 PathProgramCache]: Analyzing trace with hash -762693297, now seen corresponding path program 58 times [2021-03-10 21:28:54,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:54,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360088848] [2021-03-10 21:28:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:54,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360088848] [2021-03-10 21:28:54,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720981435] [2021-03-10 21:28:54,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:54,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:54,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:54,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:54,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:55,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:55,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:55,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:55,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:55,109 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:55,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:55,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:55,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:55,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:55,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051272787] [2021-03-10 21:28:55,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:55,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:55,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:55,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:55,131 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:55,361 INFO L93 Difference]: Finished difference Result 260 states and 675 transitions. [2021-03-10 21:28:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:28:55,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:55,362 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:28:55,362 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 21:28:55,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:28:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 21:28:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 191. [2021-03-10 21:28:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.8842105263157896) internal successors, (548), 190 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 548 transitions. [2021-03-10 21:28:55,365 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 548 transitions. Word has length 16 [2021-03-10 21:28:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:55,365 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 548 transitions. [2021-03-10 21:28:55,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 548 transitions. [2021-03-10 21:28:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:55,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:55,365 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:55,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:55,575 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:55,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:55,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1500641739, now seen corresponding path program 59 times [2021-03-10 21:28:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:55,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268868932] [2021-03-10 21:28:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:55,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268868932] [2021-03-10 21:28:55,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117623819] [2021-03-10 21:28:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:55,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:28:55,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:55,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:55,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:55,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:55,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:55,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:28:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:55,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:55,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:55,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880730225] [2021-03-10 21:28:55,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:55,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:55,846 INFO L87 Difference]: Start difference. First operand 191 states and 548 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:56,078 INFO L93 Difference]: Finished difference Result 264 states and 729 transitions. [2021-03-10 21:28:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:28:56,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:56,079 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:28:56,079 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:28:56,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:28:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:28:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 216. [2021-03-10 21:28:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9488372093023254) internal successors, (634), 215 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 634 transitions. [2021-03-10 21:28:56,082 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 634 transitions. Word has length 16 [2021-03-10 21:28:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:56,082 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 634 transitions. [2021-03-10 21:28:56,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 634 transitions. [2021-03-10 21:28:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:56,083 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:56,083 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:56,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:56,283 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1935451027, now seen corresponding path program 60 times [2021-03-10 21:28:56,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:56,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757217649] [2021-03-10 21:28:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:56,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757217649] [2021-03-10 21:28:56,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346392270] [2021-03-10 21:28:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:56,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:28:56,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:56,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:56,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:56,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:56,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:56,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:56,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:56,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:56,571 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:56,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:56,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:56,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:56,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:56,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834509179] [2021-03-10 21:28:56,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:56,595 INFO L87 Difference]: Start difference. First operand 216 states and 634 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:56,960 INFO L93 Difference]: Finished difference Result 318 states and 837 transitions. [2021-03-10 21:28:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:28:56,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:56,962 INFO L225 Difference]: With dead ends: 318 [2021-03-10 21:28:56,962 INFO L226 Difference]: Without dead ends: 292 [2021-03-10 21:28:56,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-03-10 21:28:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 218. [2021-03-10 21:28:56,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.944700460829493) internal successors, (639), 217 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 639 transitions. [2021-03-10 21:28:56,965 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 639 transitions. Word has length 16 [2021-03-10 21:28:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:56,965 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 639 transitions. [2021-03-10 21:28:56,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 639 transitions. [2021-03-10 21:28:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:56,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:56,966 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:57,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-03-10 21:28:57,175 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:57,175 INFO L82 PathProgramCache]: Analyzing trace with hash -224837719, now seen corresponding path program 61 times [2021-03-10 21:28:57,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:57,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326969298] [2021-03-10 21:28:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:57,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326969298] [2021-03-10 21:28:57,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150243998] [2021-03-10 21:28:57,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:57,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:57,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:57,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:57,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:57,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:57,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:57,495 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:57,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:57,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:57,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:57,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:28:57,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283462416] [2021-03-10 21:28:57,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:57,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:57,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:57,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:57,521 INFO L87 Difference]: Start difference. First operand 218 states and 639 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:57,923 INFO L93 Difference]: Finished difference Result 355 states and 911 transitions. [2021-03-10 21:28:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:28:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:57,924 INFO L225 Difference]: With dead ends: 355 [2021-03-10 21:28:57,924 INFO L226 Difference]: Without dead ends: 322 [2021-03-10 21:28:57,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:28:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-03-10 21:28:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 210. [2021-03-10 21:28:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.909090909090909) internal successors, (608), 209 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 608 transitions. [2021-03-10 21:28:57,928 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 608 transitions. Word has length 16 [2021-03-10 21:28:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:57,928 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 608 transitions. [2021-03-10 21:28:57,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 608 transitions. [2021-03-10 21:28:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:57,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:57,928 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:58,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-03-10 21:28:58,142 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1264567277, now seen corresponding path program 62 times [2021-03-10 21:28:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:58,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067897369] [2021-03-10 21:28:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067897369] [2021-03-10 21:28:58,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57223224] [2021-03-10 21:28:58,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:58,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:58,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:58,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:58,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:58,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:58,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:58,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:58,440 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:58,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:58,440 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:58,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:28:58,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90842057] [2021-03-10 21:28:58,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:58,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:58,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:58,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:58,464 INFO L87 Difference]: Start difference. First operand 210 states and 608 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:58,729 INFO L93 Difference]: Finished difference Result 275 states and 745 transitions. [2021-03-10 21:28:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:28:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:58,731 INFO L225 Difference]: With dead ends: 275 [2021-03-10 21:28:58,731 INFO L226 Difference]: Without dead ends: 265 [2021-03-10 21:28:58,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-03-10 21:28:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2021-03-10 21:28:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9095238095238094) internal successors, (611), 210 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 611 transitions. [2021-03-10 21:28:58,734 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 611 transitions. Word has length 16 [2021-03-10 21:28:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:58,734 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 611 transitions. [2021-03-10 21:28:58,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 611 transitions. [2021-03-10 21:28:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:58,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:58,734 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:58,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-03-10 21:28:58,948 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash -583718215, now seen corresponding path program 63 times [2021-03-10 21:28:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:58,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728254232] [2021-03-10 21:28:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728254232] [2021-03-10 21:28:59,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808955557] [2021-03-10 21:28:59,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:59,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:28:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:59,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:59,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:59,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:59,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:59,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:59,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:28:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:59,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:28:59,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153503311] [2021-03-10 21:28:59,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:59,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:59,184 INFO L87 Difference]: Start difference. First operand 211 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:59,334 INFO L93 Difference]: Finished difference Result 238 states and 653 transitions. [2021-03-10 21:28:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:28:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:28:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:59,335 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:28:59,335 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:28:59,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:28:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:28:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2021-03-10 21:28:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-03-10 21:28:59,338 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 16 [2021-03-10 21:28:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:59,338 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-03-10 21:28:59,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-03-10 21:28:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:28:59,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:59,339 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:59,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-03-10 21:28:59,553 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash -632183593, now seen corresponding path program 64 times [2021-03-10 21:28:59,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:59,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545834645] [2021-03-10 21:28:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545834645] [2021-03-10 21:28:59,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366156277] [2021-03-10 21:28:59,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:59,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:59,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:28:59,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:59,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:59,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:28:59,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:28:59,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:28:59,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:59,883 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:28:59,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:59,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:28:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:59,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:28:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844975814] [2021-03-10 21:28:59,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:59,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:59,918 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:00,283 INFO L93 Difference]: Finished difference Result 298 states and 793 transitions. [2021-03-10 21:29:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:00,284 INFO L225 Difference]: With dead ends: 298 [2021-03-10 21:29:00,284 INFO L226 Difference]: Without dead ends: 288 [2021-03-10 21:29:00,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:29:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-03-10 21:29:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 213. [2021-03-10 21:29:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.910377358490566) internal successors, (617), 212 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 617 transitions. [2021-03-10 21:29:00,287 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 617 transitions. Word has length 16 [2021-03-10 21:29:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:00,287 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 617 transitions. [2021-03-10 21:29:00,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 617 transitions. [2021-03-10 21:29:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:00,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:00,288 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:00,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-03-10 21:29:00,488 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -902455397, now seen corresponding path program 65 times [2021-03-10 21:29:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:00,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675676731] [2021-03-10 21:29:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:00,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675676731] [2021-03-10 21:29:00,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844948768] [2021-03-10 21:29:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:00,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:00,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:00,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:00,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:00,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:00,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:00,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:00,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:00,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572642669] [2021-03-10 21:29:00,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:00,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:00,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:00,731 INFO L87 Difference]: Start difference. First operand 213 states and 617 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:00,923 INFO L93 Difference]: Finished difference Result 275 states and 774 transitions. [2021-03-10 21:29:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:00,924 INFO L225 Difference]: With dead ends: 275 [2021-03-10 21:29:00,924 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:29:00,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:29:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2021-03-10 21:29:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.9625) internal successors, (711), 240 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 711 transitions. [2021-03-10 21:29:00,927 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 711 transitions. Word has length 16 [2021-03-10 21:29:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:00,927 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 711 transitions. [2021-03-10 21:29:00,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 711 transitions. [2021-03-10 21:29:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:00,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:00,928 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:01,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-03-10 21:29:01,142 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:01,142 INFO L82 PathProgramCache]: Analyzing trace with hash -43580867, now seen corresponding path program 66 times [2021-03-10 21:29:01,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:01,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498053148] [2021-03-10 21:29:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:01,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498053148] [2021-03-10 21:29:01,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664357604] [2021-03-10 21:29:01,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:01,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:01,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:01,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:01,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:01,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:01,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:01,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:01,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:01,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:01,478 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:01,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:01,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:01,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:01,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:01,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422450355] [2021-03-10 21:29:01,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:01,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:01,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:01,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:01,501 INFO L87 Difference]: Start difference. First operand 241 states and 711 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:01,929 INFO L93 Difference]: Finished difference Result 332 states and 894 transitions. [2021-03-10 21:29:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:29:01,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:01,930 INFO L225 Difference]: With dead ends: 332 [2021-03-10 21:29:01,930 INFO L226 Difference]: Without dead ends: 308 [2021-03-10 21:29:01,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:29:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-03-10 21:29:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 243. [2021-03-10 21:29:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9669421487603307) internal successors, (718), 242 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 718 transitions. [2021-03-10 21:29:01,934 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 718 transitions. Word has length 16 [2021-03-10 21:29:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:01,934 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 718 transitions. [2021-03-10 21:29:01,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 718 transitions. [2021-03-10 21:29:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:01,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:01,934 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:02,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-03-10 21:29:02,139 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:02,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1667032441, now seen corresponding path program 67 times [2021-03-10 21:29:02,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:02,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420258818] [2021-03-10 21:29:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:02,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420258818] [2021-03-10 21:29:02,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559176315] [2021-03-10 21:29:02,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:02,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:02,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:02,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:02,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:02,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:02,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:02,439 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:02,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:02,439 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:02,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:02,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:02,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651706889] [2021-03-10 21:29:02,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:02,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:02,460 INFO L87 Difference]: Start difference. First operand 243 states and 718 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:02,798 INFO L93 Difference]: Finished difference Result 325 states and 881 transitions. [2021-03-10 21:29:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:02,799 INFO L225 Difference]: With dead ends: 325 [2021-03-10 21:29:02,799 INFO L226 Difference]: Without dead ends: 315 [2021-03-10 21:29:02,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:29:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-10 21:29:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 255. [2021-03-10 21:29:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9763779527559056) internal successors, (756), 254 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 756 transitions. [2021-03-10 21:29:02,817 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 756 transitions. Word has length 16 [2021-03-10 21:29:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:02,818 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 756 transitions. [2021-03-10 21:29:02,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 756 transitions. [2021-03-10 21:29:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:02,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:02,818 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:03,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:03,031 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:03,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1138529859, now seen corresponding path program 68 times [2021-03-10 21:29:03,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:03,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730708320] [2021-03-10 21:29:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:03,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730708320] [2021-03-10 21:29:03,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833661057] [2021-03-10 21:29:03,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:03,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:03,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:03,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:03,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:03,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:03,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:03,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:03,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:03,343 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:03,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:03,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:03,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:03,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:03,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659166270] [2021-03-10 21:29:03,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:03,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:03,368 INFO L87 Difference]: Start difference. First operand 255 states and 756 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:03,796 INFO L93 Difference]: Finished difference Result 360 states and 966 transitions. [2021-03-10 21:29:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:29:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:03,797 INFO L225 Difference]: With dead ends: 360 [2021-03-10 21:29:03,797 INFO L226 Difference]: Without dead ends: 331 [2021-03-10 21:29:03,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:29:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-03-10 21:29:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 249. [2021-03-10 21:29:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.967741935483871) internal successors, (736), 248 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 736 transitions. [2021-03-10 21:29:03,800 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 736 transitions. Word has length 16 [2021-03-10 21:29:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:03,800 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 736 transitions. [2021-03-10 21:29:03,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 736 transitions. [2021-03-10 21:29:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:03,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:03,801 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:04,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2021-03-10 21:29:04,001 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2083352057, now seen corresponding path program 69 times [2021-03-10 21:29:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:04,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169013093] [2021-03-10 21:29:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:04,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169013093] [2021-03-10 21:29:04,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135575669] [2021-03-10 21:29:04,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:04,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:04,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:04,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:04,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:04,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:04,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:04,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:04,311 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:04,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:04,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:04,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:04,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:04,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889464070] [2021-03-10 21:29:04,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:04,334 INFO L87 Difference]: Start difference. First operand 249 states and 736 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:04,642 INFO L93 Difference]: Finished difference Result 305 states and 859 transitions. [2021-03-10 21:29:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:04,643 INFO L225 Difference]: With dead ends: 305 [2021-03-10 21:29:04,644 INFO L226 Difference]: Without dead ends: 300 [2021-03-10 21:29:04,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:29:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-03-10 21:29:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 250. [2021-03-10 21:29:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.967871485943775) internal successors, (739), 249 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 739 transitions. [2021-03-10 21:29:04,647 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 739 transitions. Word has length 16 [2021-03-10 21:29:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:04,647 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 739 transitions. [2021-03-10 21:29:04,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 739 transitions. [2021-03-10 21:29:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:04,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:04,647 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:04,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:04,851 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash 746546959, now seen corresponding path program 70 times [2021-03-10 21:29:04,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:04,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546408296] [2021-03-10 21:29:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:04,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546408296] [2021-03-10 21:29:04,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738956238] [2021-03-10 21:29:04,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:04,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:05,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:05,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:05,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:05,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:05,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:05,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:05,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:05,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:05,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994688752] [2021-03-10 21:29:05,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:05,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:05,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:05,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:05,103 INFO L87 Difference]: Start difference. First operand 250 states and 739 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:05,344 INFO L93 Difference]: Finished difference Result 285 states and 797 transitions. [2021-03-10 21:29:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:05,345 INFO L225 Difference]: With dead ends: 285 [2021-03-10 21:29:05,346 INFO L226 Difference]: Without dead ends: 267 [2021-03-10 21:29:05,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-03-10 21:29:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 250. [2021-03-10 21:29:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-03-10 21:29:05,350 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-03-10 21:29:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:05,350 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-03-10 21:29:05,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-03-10 21:29:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:05,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:05,350 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:05,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-03-10 21:29:05,563 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash -881350065, now seen corresponding path program 71 times [2021-03-10 21:29:05,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:05,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606941243] [2021-03-10 21:29:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:05,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606941243] [2021-03-10 21:29:05,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422304039] [2021-03-10 21:29:05,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:05,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:05,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:05,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:05,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:05,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:05,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:05,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:05,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:05,872 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:05,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:05,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:05,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:05,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:05,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573327987] [2021-03-10 21:29:05,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:05,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:05,895 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:06,319 INFO L93 Difference]: Finished difference Result 335 states and 919 transitions. [2021-03-10 21:29:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:06,321 INFO L225 Difference]: With dead ends: 335 [2021-03-10 21:29:06,321 INFO L226 Difference]: Without dead ends: 325 [2021-03-10 21:29:06,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 422.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:29:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-03-10 21:29:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2021-03-10 21:29:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-03-10 21:29:06,324 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-03-10 21:29:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:06,324 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-03-10 21:29:06,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-03-10 21:29:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:06,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:06,325 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:06,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:06,543 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1910944715, now seen corresponding path program 72 times [2021-03-10 21:29:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:06,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070083637] [2021-03-10 21:29:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:06,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070083637] [2021-03-10 21:29:06,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033455580] [2021-03-10 21:29:06,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:06,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:06,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:06,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:06,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:06,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:06,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:06,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:06,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:06,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:06,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:06,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018465907] [2021-03-10 21:29:06,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:06,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:06,775 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:06,956 INFO L93 Difference]: Finished difference Result 306 states and 878 transitions. [2021-03-10 21:29:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:06,957 INFO L225 Difference]: With dead ends: 306 [2021-03-10 21:29:06,957 INFO L226 Difference]: Without dead ends: 292 [2021-03-10 21:29:06,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-03-10 21:29:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 277. [2021-03-10 21:29:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0) internal successors, (828), 276 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 828 transitions. [2021-03-10 21:29:06,960 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 828 transitions. Word has length 16 [2021-03-10 21:29:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:06,960 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 828 transitions. [2021-03-10 21:29:06,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 828 transitions. [2021-03-10 21:29:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:06,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:06,961 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:07,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:07,161 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1525148051, now seen corresponding path program 73 times [2021-03-10 21:29:07,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:07,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937405802] [2021-03-10 21:29:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:07,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937405802] [2021-03-10 21:29:07,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353743198] [2021-03-10 21:29:07,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:07,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:07,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:07,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:07,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:07,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:07,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:07,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:07,476 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:07,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:07,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:07,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:07,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289733773] [2021-03-10 21:29:07,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:07,499 INFO L87 Difference]: Start difference. First operand 277 states and 828 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:07,992 INFO L93 Difference]: Finished difference Result 356 states and 998 transitions. [2021-03-10 21:29:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:29:07,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:07,993 INFO L225 Difference]: With dead ends: 356 [2021-03-10 21:29:07,993 INFO L226 Difference]: Without dead ends: 346 [2021-03-10 21:29:07,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:29:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-03-10 21:29:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 279. [2021-03-10 21:29:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0071942446043165) internal successors, (836), 278 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 836 transitions. [2021-03-10 21:29:07,997 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 836 transitions. Word has length 16 [2021-03-10 21:29:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:07,997 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 836 transitions. [2021-03-10 21:29:07,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 836 transitions. [2021-03-10 21:29:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:07,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:07,998 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:08,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-03-10 21:29:08,198 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 185465257, now seen corresponding path program 74 times [2021-03-10 21:29:08,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:08,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146622467] [2021-03-10 21:29:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146622467] [2021-03-10 21:29:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740718717] [2021-03-10 21:29:08,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:08,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:08,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:08,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:08,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:08,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:08,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:08,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:08,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:08,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:08,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:08,488 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:08,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:08,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:08,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:08,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692904167] [2021-03-10 21:29:08,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:08,511 INFO L87 Difference]: Start difference. First operand 279 states and 836 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:08,893 INFO L93 Difference]: Finished difference Result 370 states and 1018 transitions. [2021-03-10 21:29:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:29:08,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:08,894 INFO L225 Difference]: With dead ends: 370 [2021-03-10 21:29:08,894 INFO L226 Difference]: Without dead ends: 360 [2021-03-10 21:29:08,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:29:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-03-10 21:29:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 293. [2021-03-10 21:29:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0205479452054793) internal successors, (882), 292 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 882 transitions. [2021-03-10 21:29:08,898 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 882 transitions. Word has length 16 [2021-03-10 21:29:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:08,898 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 882 transitions. [2021-03-10 21:29:08,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 882 transitions. [2021-03-10 21:29:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:08,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:08,899 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:09,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:09,113 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1674870253, now seen corresponding path program 75 times [2021-03-10 21:29:09,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:09,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921702668] [2021-03-10 21:29:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:09,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921702668] [2021-03-10 21:29:09,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695821393] [2021-03-10 21:29:09,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:09,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:09,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:09,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:09,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:09,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:09,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:09,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:09,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:09,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:09,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:09,411 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:09,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:09,412 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:09,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:09,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138781932] [2021-03-10 21:29:09,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:09,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:09,434 INFO L87 Difference]: Start difference. First operand 293 states and 882 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:09,836 INFO L93 Difference]: Finished difference Result 377 states and 1037 transitions. [2021-03-10 21:29:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:09,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:09,838 INFO L225 Difference]: With dead ends: 377 [2021-03-10 21:29:09,838 INFO L226 Difference]: Without dead ends: 362 [2021-03-10 21:29:09,838 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:29:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-03-10 21:29:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 298. [2021-03-10 21:29:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0134680134680134) internal successors, (895), 297 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 895 transitions. [2021-03-10 21:29:09,841 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 895 transitions. Word has length 16 [2021-03-10 21:29:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:09,842 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 895 transitions. [2021-03-10 21:29:09,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 895 transitions. [2021-03-10 21:29:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:09,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:09,842 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:10,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:10,051 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash 601784873, now seen corresponding path program 76 times [2021-03-10 21:29:10,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:10,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2802540] [2021-03-10 21:29:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:10,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2802540] [2021-03-10 21:29:10,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406583653] [2021-03-10 21:29:10,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:10,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:10,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:10,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:10,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:10,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:10,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:10,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:10,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:10,372 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:10,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:10,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:10,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:10,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:10,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645586054] [2021-03-10 21:29:10,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:10,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:10,396 INFO L87 Difference]: Start difference. First operand 298 states and 895 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:10,879 INFO L93 Difference]: Finished difference Result 410 states and 1106 transitions. [2021-03-10 21:29:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:10,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:10,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:10,881 INFO L225 Difference]: With dead ends: 410 [2021-03-10 21:29:10,881 INFO L226 Difference]: Without dead ends: 395 [2021-03-10 21:29:10,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:29:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-03-10 21:29:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 297. [2021-03-10 21:29:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.027027027027027) internal successors, (896), 296 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 896 transitions. [2021-03-10 21:29:10,885 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 896 transitions. Word has length 16 [2021-03-10 21:29:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:10,885 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 896 transitions. [2021-03-10 21:29:10,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 896 transitions. [2021-03-10 21:29:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:10,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:10,886 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:11,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-03-10 21:29:11,087 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1695876461, now seen corresponding path program 77 times [2021-03-10 21:29:11,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:11,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072765526] [2021-03-10 21:29:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:11,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072765526] [2021-03-10 21:29:11,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444802399] [2021-03-10 21:29:11,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:11,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:11,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:11,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:29:11,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:11,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:29:11,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:11,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:11,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:29:11,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:11,433 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:11,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:11,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-03-10 21:29:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:11,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:11,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:11,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772716690] [2021-03-10 21:29:11,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:11,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:11,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:11,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:11,457 INFO L87 Difference]: Start difference. First operand 297 states and 896 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:11,858 INFO L93 Difference]: Finished difference Result 367 states and 1051 transitions. [2021-03-10 21:29:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:29:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:11,859 INFO L225 Difference]: With dead ends: 367 [2021-03-10 21:29:11,859 INFO L226 Difference]: Without dead ends: 362 [2021-03-10 21:29:11,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:29:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-03-10 21:29:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 299. [2021-03-10 21:29:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0167785234899327) internal successors, (899), 298 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 899 transitions. [2021-03-10 21:29:11,863 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 899 transitions. Word has length 16 [2021-03-10 21:29:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:11,863 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 899 transitions. [2021-03-10 21:29:11,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 899 transitions. [2021-03-10 21:29:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:11,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:11,863 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:12,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:12,064 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:12,064 INFO L82 PathProgramCache]: Analyzing trace with hash 576133811, now seen corresponding path program 78 times [2021-03-10 21:29:12,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:12,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678747987] [2021-03-10 21:29:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:12,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678747987] [2021-03-10 21:29:12,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901414015] [2021-03-10 21:29:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:12,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:12,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:12,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:12,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:12,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:12,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:12,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:12,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:12,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:12,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:12,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844868749] [2021-03-10 21:29:12,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:12,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:12,399 INFO L87 Difference]: Start difference. First operand 299 states and 899 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:12,709 INFO L93 Difference]: Finished difference Result 348 states and 996 transitions. [2021-03-10 21:29:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:12,711 INFO L225 Difference]: With dead ends: 348 [2021-03-10 21:29:12,711 INFO L226 Difference]: Without dead ends: 337 [2021-03-10 21:29:12,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-03-10 21:29:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 304. [2021-03-10 21:29:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-03-10 21:29:12,714 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 17 [2021-03-10 21:29:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:12,715 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-03-10 21:29:12,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-03-10 21:29:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:12,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:12,715 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:12,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-03-10 21:29:12,916 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash 726231765, now seen corresponding path program 79 times [2021-03-10 21:29:12,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:12,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052518948] [2021-03-10 21:29:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:12,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052518948] [2021-03-10 21:29:12,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693398814] [2021-03-10 21:29:12,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:13,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:13,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:13,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:13,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:13,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:13,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:13,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:13,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:13,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102631194] [2021-03-10 21:29:13,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:13,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:13,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:13,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:13,182 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:13,361 INFO L93 Difference]: Finished difference Result 394 states and 1062 transitions. [2021-03-10 21:29:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:13,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:13,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:13,362 INFO L225 Difference]: With dead ends: 394 [2021-03-10 21:29:13,362 INFO L226 Difference]: Without dead ends: 385 [2021-03-10 21:29:13,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-03-10 21:29:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 306. [2021-03-10 21:29:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-03-10 21:29:13,366 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-03-10 21:29:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:13,366 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-03-10 21:29:13,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-03-10 21:29:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:13,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:13,366 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:13,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-03-10 21:29:13,568 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:13,568 INFO L82 PathProgramCache]: Analyzing trace with hash -999247693, now seen corresponding path program 80 times [2021-03-10 21:29:13,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:13,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155055496] [2021-03-10 21:29:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:13,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155055496] [2021-03-10 21:29:13,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231294911] [2021-03-10 21:29:13,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:13,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:13,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:13,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:13,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:13,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:13,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:13,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:13,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:13,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:13,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:13,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:13,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038393428] [2021-03-10 21:29:13,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:13,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:13,870 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:14,132 INFO L93 Difference]: Finished difference Result 393 states and 1076 transitions. [2021-03-10 21:29:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:14,134 INFO L225 Difference]: With dead ends: 393 [2021-03-10 21:29:14,134 INFO L226 Difference]: Without dead ends: 388 [2021-03-10 21:29:14,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-03-10 21:29:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 306. [2021-03-10 21:29:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-03-10 21:29:14,138 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-03-10 21:29:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:14,138 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-03-10 21:29:14,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-03-10 21:29:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:14,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:14,138 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:14,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-03-10 21:29:14,347 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1659695474, now seen corresponding path program 81 times [2021-03-10 21:29:14,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:14,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17247018] [2021-03-10 21:29:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17247018] [2021-03-10 21:29:14,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136147191] [2021-03-10 21:29:14,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:14,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:14,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:14,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:14,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80811493] [2021-03-10 21:29:14,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:14,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:14,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:14,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:14,431 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:14,468 INFO L93 Difference]: Finished difference Result 469 states and 1200 transitions. [2021-03-10 21:29:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:14,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:14,469 INFO L225 Difference]: With dead ends: 469 [2021-03-10 21:29:14,469 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 21:29:14,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 21:29:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 312. [2021-03-10 21:29:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0160771704180065) internal successors, (938), 311 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 938 transitions. [2021-03-10 21:29:14,473 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 938 transitions. Word has length 17 [2021-03-10 21:29:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:14,473 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 938 transitions. [2021-03-10 21:29:14,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 938 transitions. [2021-03-10 21:29:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:14,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:14,474 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:14,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-03-10 21:29:14,674 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1013855483, now seen corresponding path program 82 times [2021-03-10 21:29:14,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:14,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011783117] [2021-03-10 21:29:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011783117] [2021-03-10 21:29:14,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373369880] [2021-03-10 21:29:14,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:14,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:14,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:14,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:14,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:14,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:14,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:14,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:14,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:14,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:14,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867359191] [2021-03-10 21:29:14,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:14,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:14,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:14,945 INFO L87 Difference]: Start difference. First operand 312 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:15,167 INFO L93 Difference]: Finished difference Result 389 states and 1080 transitions. [2021-03-10 21:29:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:15,169 INFO L225 Difference]: With dead ends: 389 [2021-03-10 21:29:15,169 INFO L226 Difference]: Without dead ends: 384 [2021-03-10 21:29:15,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:15,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-03-10 21:29:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-03-10 21:29:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.022364217252396) internal successors, (946), 313 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 946 transitions. [2021-03-10 21:29:15,173 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 946 transitions. Word has length 17 [2021-03-10 21:29:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:15,173 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 946 transitions. [2021-03-10 21:29:15,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 946 transitions. [2021-03-10 21:29:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:15,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:15,174 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:15,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-03-10 21:29:15,379 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:15,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1555632355, now seen corresponding path program 83 times [2021-03-10 21:29:15,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:15,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120301302] [2021-03-10 21:29:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120301302] [2021-03-10 21:29:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937558745] [2021-03-10 21:29:15,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:15,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:29:15,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:15,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:15,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:15,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:15,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:15,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:15,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:15,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:15,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:15,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610369896] [2021-03-10 21:29:15,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:15,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:15,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:15,666 INFO L87 Difference]: Start difference. First operand 314 states and 946 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:15,924 INFO L93 Difference]: Finished difference Result 398 states and 1096 transitions. [2021-03-10 21:29:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:15,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:15,926 INFO L225 Difference]: With dead ends: 398 [2021-03-10 21:29:15,926 INFO L226 Difference]: Without dead ends: 389 [2021-03-10 21:29:15,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-03-10 21:29:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 316. [2021-03-10 21:29:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-03-10 21:29:15,930 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-03-10 21:29:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:15,930 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-03-10 21:29:15,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-03-10 21:29:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:15,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:15,931 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:16,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:16,131 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1249929945, now seen corresponding path program 84 times [2021-03-10 21:29:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:16,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426381195] [2021-03-10 21:29:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:16,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426381195] [2021-03-10 21:29:16,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640991523] [2021-03-10 21:29:16,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:16,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:29:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:16,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:16,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:16,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:16,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:16,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:16,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:16,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:16,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:16,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623434270] [2021-03-10 21:29:16,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:16,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:16,439 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:16,607 INFO L93 Difference]: Finished difference Result 377 states and 1066 transitions. [2021-03-10 21:29:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:16,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:16,611 INFO L225 Difference]: With dead ends: 377 [2021-03-10 21:29:16,611 INFO L226 Difference]: Without dead ends: 372 [2021-03-10 21:29:16,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-10 21:29:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 316. [2021-03-10 21:29:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-03-10 21:29:16,615 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-03-10 21:29:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:16,615 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-03-10 21:29:16,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-03-10 21:29:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:16,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:16,616 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:16,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:16,830 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2141251576, now seen corresponding path program 85 times [2021-03-10 21:29:16,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:16,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124359848] [2021-03-10 21:29:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124359848] [2021-03-10 21:29:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214363492] [2021-03-10 21:29:16,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:16,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:16,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:16,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:16,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993873908] [2021-03-10 21:29:16,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:16,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:16,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:16,905 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:16,965 INFO L93 Difference]: Finished difference Result 509 states and 1289 transitions. [2021-03-10 21:29:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:16,967 INFO L225 Difference]: With dead ends: 509 [2021-03-10 21:29:16,967 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 21:29:16,967 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 21:29:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 312. [2021-03-10 21:29:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-03-10 21:29:16,971 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 17 [2021-03-10 21:29:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:16,971 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-03-10 21:29:16,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-03-10 21:29:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:16,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:16,972 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:17,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:17,172 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1196751859, now seen corresponding path program 86 times [2021-03-10 21:29:17,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:17,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069751934] [2021-03-10 21:29:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:17,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069751934] [2021-03-10 21:29:17,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161186288] [2021-03-10 21:29:17,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:17,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:17,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:17,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:17,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:17,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:17,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:17,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:17,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:17,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:17,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:17,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:29:17,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444187018] [2021-03-10 21:29:17,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:17,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:17,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:17,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:17,424 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:17,613 INFO L93 Difference]: Finished difference Result 345 states and 992 transitions. [2021-03-10 21:29:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:17,614 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:29:17,614 INFO L226 Difference]: Without dead ends: 321 [2021-03-10 21:29:17,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-03-10 21:29:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 313. [2021-03-10 21:29:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0096153846153846) internal successors, (939), 312 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 939 transitions. [2021-03-10 21:29:17,617 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 939 transitions. Word has length 17 [2021-03-10 21:29:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:17,618 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 939 transitions. [2021-03-10 21:29:17,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:17,618 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 939 transitions. [2021-03-10 21:29:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:17,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:17,618 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:17,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-03-10 21:29:17,823 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1148286481, now seen corresponding path program 87 times [2021-03-10 21:29:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:17,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213888509] [2021-03-10 21:29:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:17,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213888509] [2021-03-10 21:29:17,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896272136] [2021-03-10 21:29:17,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:17,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:17,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:17,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:18,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:18,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:18,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:18,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:18,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:18,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:18,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:18,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:18,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621426330] [2021-03-10 21:29:18,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:18,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:18,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:18,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:18,097 INFO L87 Difference]: Start difference. First operand 313 states and 939 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:18,326 INFO L93 Difference]: Finished difference Result 386 states and 1054 transitions. [2021-03-10 21:29:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:18,328 INFO L225 Difference]: With dead ends: 386 [2021-03-10 21:29:18,328 INFO L226 Difference]: Without dead ends: 363 [2021-03-10 21:29:18,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-03-10 21:29:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 313. [2021-03-10 21:29:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-03-10 21:29:18,331 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 17 [2021-03-10 21:29:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:18,331 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-03-10 21:29:18,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-03-10 21:29:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:18,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:18,332 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:18,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-03-10 21:29:18,535 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash 878014677, now seen corresponding path program 88 times [2021-03-10 21:29:18,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:18,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417233142] [2021-03-10 21:29:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:18,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417233142] [2021-03-10 21:29:18,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318662109] [2021-03-10 21:29:18,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:18,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:18,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:18,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:18,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:18,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:18,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:18,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:18,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:18,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:18,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867433390] [2021-03-10 21:29:18,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:18,799 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:19,003 INFO L93 Difference]: Finished difference Result 367 states and 1032 transitions. [2021-03-10 21:29:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:19,004 INFO L225 Difference]: With dead ends: 367 [2021-03-10 21:29:19,004 INFO L226 Difference]: Without dead ends: 358 [2021-03-10 21:29:19,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-03-10 21:29:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 312. [2021-03-10 21:29:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.987138263665595) internal successors, (929), 311 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 929 transitions. [2021-03-10 21:29:19,008 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 929 transitions. Word has length 17 [2021-03-10 21:29:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:19,008 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 929 transitions. [2021-03-10 21:29:19,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 929 transitions. [2021-03-10 21:29:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:19,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:19,009 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:19,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:19,215 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash -847464781, now seen corresponding path program 89 times [2021-03-10 21:29:19,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:19,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441295330] [2021-03-10 21:29:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:19,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441295330] [2021-03-10 21:29:19,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845431685] [2021-03-10 21:29:19,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:19,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:29:19,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:19,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:19,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:19,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:19,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:19,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:19,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:19,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:19,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:19,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006547277] [2021-03-10 21:29:19,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:19,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:19,480 INFO L87 Difference]: Start difference. First operand 312 states and 929 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:19,741 INFO L93 Difference]: Finished difference Result 358 states and 1007 transitions. [2021-03-10 21:29:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:19,742 INFO L225 Difference]: With dead ends: 358 [2021-03-10 21:29:19,742 INFO L226 Difference]: Without dead ends: 353 [2021-03-10 21:29:19,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-03-10 21:29:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 310. [2021-03-10 21:29:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9967637540453076) internal successors, (926), 309 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 926 transitions. [2021-03-10 21:29:19,746 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 926 transitions. Word has length 17 [2021-03-10 21:29:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:19,746 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 926 transitions. [2021-03-10 21:29:19,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 926 transitions. [2021-03-10 21:29:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:19,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:19,746 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:19,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-03-10 21:29:19,947 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash 641940215, now seen corresponding path program 90 times [2021-03-10 21:29:19,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:19,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329038944] [2021-03-10 21:29:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329038944] [2021-03-10 21:29:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143274034] [2021-03-10 21:29:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:20,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:20,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:20,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:20,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:20,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:20,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:20,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:20,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903806999] [2021-03-10 21:29:20,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:20,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:20,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:20,226 INFO L87 Difference]: Start difference. First operand 310 states and 926 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:20,506 INFO L93 Difference]: Finished difference Result 390 states and 1052 transitions. [2021-03-10 21:29:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:20,507 INFO L225 Difference]: With dead ends: 390 [2021-03-10 21:29:20,507 INFO L226 Difference]: Without dead ends: 367 [2021-03-10 21:29:20,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:29:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-03-10 21:29:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 308. [2021-03-10 21:29:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.96742671009772) internal successors, (911), 307 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 911 transitions. [2021-03-10 21:29:20,511 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 911 transitions. Word has length 17 [2021-03-10 21:29:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:20,511 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 911 transitions. [2021-03-10 21:29:20,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 911 transitions. [2021-03-10 21:29:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:20,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:20,512 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:20,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1247,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:20,712 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash -249381416, now seen corresponding path program 91 times [2021-03-10 21:29:20,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:20,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448582750] [2021-03-10 21:29:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448582750] [2021-03-10 21:29:20,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914411722] [2021-03-10 21:29:20,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:20,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:20,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:20,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451035208] [2021-03-10 21:29:20,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:20,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:20,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:20,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:20,804 INFO L87 Difference]: Start difference. First operand 308 states and 911 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:20,856 INFO L93 Difference]: Finished difference Result 461 states and 1184 transitions. [2021-03-10 21:29:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:20,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:20,857 INFO L225 Difference]: With dead ends: 461 [2021-03-10 21:29:20,857 INFO L226 Difference]: Without dead ends: 461 [2021-03-10 21:29:20,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-03-10 21:29:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 321. [2021-03-10 21:29:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-03-10 21:29:20,861 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-03-10 21:29:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:20,861 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-03-10 21:29:20,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-03-10 21:29:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:20,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:20,862 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:21,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,062 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -431145165, now seen corresponding path program 92 times [2021-03-10 21:29:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:21,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468768365] [2021-03-10 21:29:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468768365] [2021-03-10 21:29:21,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948659854] [2021-03-10 21:29:21,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:21,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:21,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:21,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:21,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:21,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:21,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:21,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851080876] [2021-03-10 21:29:21,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:21,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:21,361 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:21,596 INFO L93 Difference]: Finished difference Result 404 states and 1118 transitions. [2021-03-10 21:29:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:21,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:21,597 INFO L225 Difference]: With dead ends: 404 [2021-03-10 21:29:21,597 INFO L226 Difference]: Without dead ends: 399 [2021-03-10 21:29:21,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-03-10 21:29:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 321. [2021-03-10 21:29:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-03-10 21:29:21,601 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-03-10 21:29:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:21,601 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-03-10 21:29:21,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-03-10 21:29:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:21,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:21,601 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:21,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1272 [2021-03-10 21:29:21,807 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash 288474162, now seen corresponding path program 93 times [2021-03-10 21:29:21,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:21,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559701490] [2021-03-10 21:29:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559701490] [2021-03-10 21:29:21,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889461276] [2021-03-10 21:29:21,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:21,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:21,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786484539] [2021-03-10 21:29:21,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:21,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:21,881 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:21,957 INFO L93 Difference]: Finished difference Result 535 states and 1451 transitions. [2021-03-10 21:29:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:21,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:21,958 INFO L225 Difference]: With dead ends: 535 [2021-03-10 21:29:21,958 INFO L226 Difference]: Without dead ends: 535 [2021-03-10 21:29:21,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-10 21:29:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 405. [2021-03-10 21:29:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.027227722772277) internal successors, (1223), 404 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1223 transitions. [2021-03-10 21:29:21,963 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1223 transitions. Word has length 17 [2021-03-10 21:29:21,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:21,963 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1223 transitions. [2021-03-10 21:29:21,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1223 transitions. [2021-03-10 21:29:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:21,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:21,964 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:22,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1294,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:22,171 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1767950263, now seen corresponding path program 94 times [2021-03-10 21:29:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:22,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829229032] [2021-03-10 21:29:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:22,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829229032] [2021-03-10 21:29:22,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745163398] [2021-03-10 21:29:22,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:22,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:22,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:22,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:22,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:22,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:22,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:22,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:22,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:22,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:22,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:22,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:22,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919288074] [2021-03-10 21:29:22,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:22,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:22,443 INFO L87 Difference]: Start difference. First operand 405 states and 1223 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:22,639 INFO L93 Difference]: Finished difference Result 449 states and 1310 transitions. [2021-03-10 21:29:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:22,640 INFO L225 Difference]: With dead ends: 449 [2021-03-10 21:29:22,640 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 21:29:22,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 21:29:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 408. [2021-03-10 21:29:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2021-03-10 21:29:22,645 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 17 [2021-03-10 21:29:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:22,645 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2021-03-10 21:29:22,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2021-03-10 21:29:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:22,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:22,646 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:22,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:22,860 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash 899120009, now seen corresponding path program 95 times [2021-03-10 21:29:22,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:22,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261020846] [2021-03-10 21:29:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:22,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261020846] [2021-03-10 21:29:22,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940151419] [2021-03-10 21:29:22,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:22,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:22,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:22,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:23,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:23,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:23,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:23,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:23,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:23,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:23,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:23,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:23,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48144772] [2021-03-10 21:29:23,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:23,152 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:23,346 INFO L93 Difference]: Finished difference Result 472 states and 1325 transitions. [2021-03-10 21:29:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:23,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:23,347 INFO L225 Difference]: With dead ends: 472 [2021-03-10 21:29:23,347 INFO L226 Difference]: Without dead ends: 459 [2021-03-10 21:29:23,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-03-10 21:29:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 408. [2021-03-10 21:29:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-03-10 21:29:23,351 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-03-10 21:29:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:23,351 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-03-10 21:29:23,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-03-10 21:29:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:23,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:23,352 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:23,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-03-10 21:29:23,566 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash -603552507, now seen corresponding path program 96 times [2021-03-10 21:29:23,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:23,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142480911] [2021-03-10 21:29:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142480911] [2021-03-10 21:29:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443832792] [2021-03-10 21:29:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:23,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:23,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:23,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:23,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:23,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:23,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:23,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:23,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:23,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:23,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:23,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936879701] [2021-03-10 21:29:23,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:23,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:23,853 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:24,092 INFO L93 Difference]: Finished difference Result 440 states and 1285 transitions. [2021-03-10 21:29:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:24,093 INFO L225 Difference]: With dead ends: 440 [2021-03-10 21:29:24,093 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 21:29:24,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 21:29:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 408. [2021-03-10 21:29:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-03-10 21:29:24,098 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-03-10 21:29:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:24,098 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-03-10 21:29:24,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-03-10 21:29:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:24,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:24,098 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:24,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-03-10 21:29:24,303 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1965935331, now seen corresponding path program 97 times [2021-03-10 21:29:24,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:24,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518542978] [2021-03-10 21:29:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:24,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518542978] [2021-03-10 21:29:24,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590888608] [2021-03-10 21:29:24,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:24,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:24,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:24,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:24,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:24,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:24,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:24,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:24,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:24,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120031180] [2021-03-10 21:29:24,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:24,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:24,567 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:24,745 INFO L93 Difference]: Finished difference Result 447 states and 1289 transitions. [2021-03-10 21:29:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:24,746 INFO L225 Difference]: With dead ends: 447 [2021-03-10 21:29:24,746 INFO L226 Difference]: Without dead ends: 442 [2021-03-10 21:29:24,746 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-03-10 21:29:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 408. [2021-03-10 21:29:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-03-10 21:29:24,750 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-03-10 21:29:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:24,751 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-03-10 21:29:24,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-03-10 21:29:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:24,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:24,751 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:24,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:24,952 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash -839626969, now seen corresponding path program 98 times [2021-03-10 21:29:24,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:24,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573019764] [2021-03-10 21:29:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:25,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573019764] [2021-03-10 21:29:25,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831748028] [2021-03-10 21:29:25,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:25,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:25,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:25,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:25,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:25,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:25,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:25,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:25,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:25,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:25,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:25,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612999724] [2021-03-10 21:29:25,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:25,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:25,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:25,268 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:25,452 INFO L93 Difference]: Finished difference Result 462 states and 1322 transitions. [2021-03-10 21:29:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:25,453 INFO L225 Difference]: With dead ends: 462 [2021-03-10 21:29:25,453 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 21:29:25,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 21:29:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 408. [2021-03-10 21:29:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-03-10 21:29:25,458 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-03-10 21:29:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:25,458 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-03-10 21:29:25,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-03-10 21:29:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:25,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:25,458 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:25,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-03-10 21:29:25,659 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1912712349, now seen corresponding path program 99 times [2021-03-10 21:29:25,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:25,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457139011] [2021-03-10 21:29:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:25,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457139011] [2021-03-10 21:29:25,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335849929] [2021-03-10 21:29:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:25,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:25,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:25,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:25,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:25,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:25,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:25,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:25,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:25,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:25,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:25,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:25,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733408134] [2021-03-10 21:29:25,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:25,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:25,940 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:26,147 INFO L93 Difference]: Finished difference Result 490 states and 1379 transitions. [2021-03-10 21:29:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:26,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:26,149 INFO L225 Difference]: With dead ends: 490 [2021-03-10 21:29:26,149 INFO L226 Difference]: Without dead ends: 477 [2021-03-10 21:29:26,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-03-10 21:29:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 408. [2021-03-10 21:29:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0) internal successors, (1221), 407 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1221 transitions. [2021-03-10 21:29:26,153 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1221 transitions. Word has length 17 [2021-03-10 21:29:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:26,153 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1221 transitions. [2021-03-10 21:29:26,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1221 transitions. [2021-03-10 21:29:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:26,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:26,154 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:26,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-03-10 21:29:26,360 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:26,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1193093022, now seen corresponding path program 100 times [2021-03-10 21:29:26,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:26,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145604594] [2021-03-10 21:29:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:26,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145604594] [2021-03-10 21:29:26,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726090601] [2021-03-10 21:29:26,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:26,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:26,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:26,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:26,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:26,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211958976] [2021-03-10 21:29:26,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:26,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:26,441 INFO L87 Difference]: Start difference. First operand 408 states and 1221 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:26,513 INFO L93 Difference]: Finished difference Result 549 states and 1446 transitions. [2021-03-10 21:29:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:26,514 INFO L225 Difference]: With dead ends: 549 [2021-03-10 21:29:26,514 INFO L226 Difference]: Without dead ends: 549 [2021-03-10 21:29:26,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-03-10 21:29:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 317. [2021-03-10 21:29:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-03-10 21:29:26,518 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-03-10 21:29:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:26,518 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-03-10 21:29:26,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-03-10 21:29:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:26,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:26,519 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:26,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1467 [2021-03-10 21:29:26,719 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:26,719 INFO L82 PathProgramCache]: Analyzing trace with hash -818620761, now seen corresponding path program 101 times [2021-03-10 21:29:26,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:26,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206163649] [2021-03-10 21:29:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:26,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206163649] [2021-03-10 21:29:26,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429806990] [2021-03-10 21:29:26,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:26,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:26,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:26,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:27,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:27,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:27,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:27,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:27,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:27,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:27,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086169745] [2021-03-10 21:29:27,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:27,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:27,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:27,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:27,033 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:27,284 INFO L93 Difference]: Finished difference Result 398 states and 1075 transitions. [2021-03-10 21:29:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:27,285 INFO L225 Difference]: With dead ends: 398 [2021-03-10 21:29:27,285 INFO L226 Difference]: Without dead ends: 393 [2021-03-10 21:29:27,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-03-10 21:29:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 317. [2021-03-10 21:29:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-03-10 21:29:27,289 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-03-10 21:29:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:27,289 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-03-10 21:29:27,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-03-10 21:29:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:27,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:27,290 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:27,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-03-10 21:29:27,495 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:27,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1699439288, now seen corresponding path program 102 times [2021-03-10 21:29:27,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:27,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475122267] [2021-03-10 21:29:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:27,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475122267] [2021-03-10 21:29:27,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857974866] [2021-03-10 21:29:27,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:27,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:27,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:27,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:27,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:27,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614723442] [2021-03-10 21:29:27,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:27,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:27,619 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:27,728 INFO L93 Difference]: Finished difference Result 478 states and 1278 transitions. [2021-03-10 21:29:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:27,729 INFO L225 Difference]: With dead ends: 478 [2021-03-10 21:29:27,729 INFO L226 Difference]: Without dead ends: 478 [2021-03-10 21:29:27,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-03-10 21:29:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 361. [2021-03-10 21:29:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9611111111111112) internal successors, (1066), 360 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1066 transitions. [2021-03-10 21:29:27,733 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1066 transitions. Word has length 17 [2021-03-10 21:29:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:27,733 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1066 transitions. [2021-03-10 21:29:27,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1066 transitions. [2021-03-10 21:29:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:27,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:27,734 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:27,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:27,934 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:27,934 INFO L82 PathProgramCache]: Analyzing trace with hash 815564467, now seen corresponding path program 103 times [2021-03-10 21:29:27,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:27,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158541830] [2021-03-10 21:29:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:27,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158541830] [2021-03-10 21:29:27,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086515530] [2021-03-10 21:29:27,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:28,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:28,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:28,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:28,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:28,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:28,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:28,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:28,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:28,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275674954] [2021-03-10 21:29:28,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:28,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:28,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:28,222 INFO L87 Difference]: Start difference. First operand 361 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:28,444 INFO L93 Difference]: Finished difference Result 418 states and 1180 transitions. [2021-03-10 21:29:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:28,445 INFO L225 Difference]: With dead ends: 418 [2021-03-10 21:29:28,445 INFO L226 Difference]: Without dead ends: 408 [2021-03-10 21:29:28,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-03-10 21:29:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2021-03-10 21:29:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.967123287671233) internal successors, (1083), 365 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1083 transitions. [2021-03-10 21:29:28,449 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1083 transitions. Word has length 17 [2021-03-10 21:29:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:28,449 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1083 transitions. [2021-03-10 21:29:28,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1083 transitions. [2021-03-10 21:29:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:28,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:28,449 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:28,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1504,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:28,650 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1764893969, now seen corresponding path program 104 times [2021-03-10 21:29:28,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:28,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101699702] [2021-03-10 21:29:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:28,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101699702] [2021-03-10 21:29:28,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940914171] [2021-03-10 21:29:28,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:28,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:28,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:28,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:28,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:28,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:28,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:28,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:28,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:28,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85037550] [2021-03-10 21:29:28,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:28,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:28,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:28,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:28,947 INFO L87 Difference]: Start difference. First operand 366 states and 1083 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:29,230 INFO L93 Difference]: Finished difference Result 443 states and 1194 transitions. [2021-03-10 21:29:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:29,231 INFO L225 Difference]: With dead ends: 443 [2021-03-10 21:29:29,232 INFO L226 Difference]: Without dead ends: 428 [2021-03-10 21:29:29,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-10 21:29:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 366. [2021-03-10 21:29:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-03-10 21:29:29,236 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-03-10 21:29:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:29,236 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-03-10 21:29:29,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-03-10 21:29:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:29,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:29,236 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:29,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1527,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:29,450 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 712505045, now seen corresponding path program 105 times [2021-03-10 21:29:29,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:29,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232114473] [2021-03-10 21:29:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:29,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232114473] [2021-03-10 21:29:29,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269346223] [2021-03-10 21:29:29,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:29,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:29:29,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:29,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:29,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:29,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:29,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:29,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:29,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:29,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:29,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:29,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:29,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:29,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366433401] [2021-03-10 21:29:29,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:29,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:29,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:29,738 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:29,918 INFO L93 Difference]: Finished difference Result 398 states and 1150 transitions. [2021-03-10 21:29:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:29,919 INFO L225 Difference]: With dead ends: 398 [2021-03-10 21:29:29,919 INFO L226 Difference]: Without dead ends: 393 [2021-03-10 21:29:29,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-03-10 21:29:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 366. [2021-03-10 21:29:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-03-10 21:29:29,923 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-03-10 21:29:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:29,923 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-03-10 21:29:29,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-03-10 21:29:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:29,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:29,924 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:30,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:30,124 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:30,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1012974413, now seen corresponding path program 106 times [2021-03-10 21:29:30,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:30,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085135023] [2021-03-10 21:29:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:30,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085135023] [2021-03-10 21:29:30,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624189479] [2021-03-10 21:29:30,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:30,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:30,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:30,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:30,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:30,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:30,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:30,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:30,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:30,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:30,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:30,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:30,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:30,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858635440] [2021-03-10 21:29:30,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:30,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:30,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:30,390 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:30,641 INFO L93 Difference]: Finished difference Result 409 states and 1153 transitions. [2021-03-10 21:29:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:30,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:30,642 INFO L225 Difference]: With dead ends: 409 [2021-03-10 21:29:30,642 INFO L226 Difference]: Without dead ends: 404 [2021-03-10 21:29:30,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-03-10 21:29:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 366. [2021-03-10 21:29:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-03-10 21:29:30,646 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-03-10 21:29:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:30,646 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-03-10 21:29:30,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-03-10 21:29:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:30,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:30,646 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:30,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-03-10 21:29:30,847 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:30,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1645968754, now seen corresponding path program 107 times [2021-03-10 21:29:30,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:30,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150893011] [2021-03-10 21:29:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:30,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150893011] [2021-03-10 21:29:30,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359122477] [2021-03-10 21:29:30,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:30,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:29:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:30,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:30,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:30,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:30,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583111427] [2021-03-10 21:29:30,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:30,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:30,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:30,920 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:30,968 INFO L93 Difference]: Finished difference Result 517 states and 1369 transitions. [2021-03-10 21:29:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:30,969 INFO L225 Difference]: With dead ends: 517 [2021-03-10 21:29:30,969 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 21:29:30,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 21:29:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 397. [2021-03-10 21:29:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.9823232323232323) internal successors, (1181), 396 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1181 transitions. [2021-03-10 21:29:30,973 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1181 transitions. Word has length 17 [2021-03-10 21:29:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:30,973 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1181 transitions. [2021-03-10 21:29:30,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1181 transitions. [2021-03-10 21:29:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:30,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:30,974 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:31,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-03-10 21:29:31,174 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash 476430583, now seen corresponding path program 108 times [2021-03-10 21:29:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:31,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739349868] [2021-03-10 21:29:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:31,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739349868] [2021-03-10 21:29:31,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947092404] [2021-03-10 21:29:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:31,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:31,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:31,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:31,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:31,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:31,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:31,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:31,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:31,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:31,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:31,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404601882] [2021-03-10 21:29:31,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:31,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:31,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:31,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:31,492 INFO L87 Difference]: Start difference. First operand 397 states and 1181 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:31,742 INFO L93 Difference]: Finished difference Result 450 states and 1270 transitions. [2021-03-10 21:29:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:31,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:31,743 INFO L225 Difference]: With dead ends: 450 [2021-03-10 21:29:31,743 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 21:29:31,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 21:29:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 399. [2021-03-10 21:29:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.979899497487437) internal successors, (1186), 398 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1186 transitions. [2021-03-10 21:29:31,747 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1186 transitions. Word has length 17 [2021-03-10 21:29:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:31,747 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 1186 transitions. [2021-03-10 21:29:31,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1186 transitions. [2021-03-10 21:29:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:31,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:31,748 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:31,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:31,948 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash -414891048, now seen corresponding path program 109 times [2021-03-10 21:29:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:31,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255232126] [2021-03-10 21:29:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:31,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255232126] [2021-03-10 21:29:31,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084114344] [2021-03-10 21:29:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:31,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:32,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:32,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:32,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918552406] [2021-03-10 21:29:32,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:32,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:32,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:32,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:32,026 INFO L87 Difference]: Start difference. First operand 399 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:32,099 INFO L93 Difference]: Finished difference Result 520 states and 1374 transitions. [2021-03-10 21:29:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:32,100 INFO L225 Difference]: With dead ends: 520 [2021-03-10 21:29:32,100 INFO L226 Difference]: Without dead ends: 520 [2021-03-10 21:29:32,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-03-10 21:29:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-03-10 21:29:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-03-10 21:29:32,105 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-03-10 21:29:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:32,105 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-03-10 21:29:32,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,105 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-03-10 21:29:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:32,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:32,105 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:32,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-03-10 21:29:32,306 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:32,306 INFO L82 PathProgramCache]: Analyzing trace with hash -596654797, now seen corresponding path program 110 times [2021-03-10 21:29:32,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:32,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191887447] [2021-03-10 21:29:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:32,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191887447] [2021-03-10 21:29:32,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40233724] [2021-03-10 21:29:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:32,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:32,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:32,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:32,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:32,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:32,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:32,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:32,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:32,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:32,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:29:32,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458470185] [2021-03-10 21:29:32,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:32,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:32,613 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:32,825 INFO L93 Difference]: Finished difference Result 459 states and 1275 transitions. [2021-03-10 21:29:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:32,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:32,826 INFO L225 Difference]: With dead ends: 459 [2021-03-10 21:29:32,826 INFO L226 Difference]: Without dead ends: 454 [2021-03-10 21:29:32,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-03-10 21:29:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 396. [2021-03-10 21:29:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-03-10 21:29:32,831 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-03-10 21:29:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:32,831 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-03-10 21:29:32,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-03-10 21:29:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:32,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:32,831 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:33,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1654,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:33,045 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash 122964530, now seen corresponding path program 111 times [2021-03-10 21:29:33,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:33,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509766853] [2021-03-10 21:29:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:33,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509766853] [2021-03-10 21:29:33,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257781168] [2021-03-10 21:29:33,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:33,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:33,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:33,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:33,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:33,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746724926] [2021-03-10 21:29:33,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:33,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:33,132 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:33,179 INFO L93 Difference]: Finished difference Result 484 states and 1366 transitions. [2021-03-10 21:29:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:29:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:33,180 INFO L225 Difference]: With dead ends: 484 [2021-03-10 21:29:33,180 INFO L226 Difference]: Without dead ends: 484 [2021-03-10 21:29:33,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-03-10 21:29:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 431. [2021-03-10 21:29:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.974418604651163) internal successors, (1279), 430 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1279 transitions. [2021-03-10 21:29:33,185 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1279 transitions. Word has length 17 [2021-03-10 21:29:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:33,185 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1279 transitions. [2021-03-10 21:29:33,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1279 transitions. [2021-03-10 21:29:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:33,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:33,185 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:33,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-03-10 21:29:33,400 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:33,400 INFO L82 PathProgramCache]: Analyzing trace with hash 497436791, now seen corresponding path program 112 times [2021-03-10 21:29:33,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:33,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374994786] [2021-03-10 21:29:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:33,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374994786] [2021-03-10 21:29:33,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663995785] [2021-03-10 21:29:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:33,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:33,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:33,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:33,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:33,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:33,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:33,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:33,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:33,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:33,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:33,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:33,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43973657] [2021-03-10 21:29:33,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:33,706 INFO L87 Difference]: Start difference. First operand 431 states and 1279 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:34,005 INFO L93 Difference]: Finished difference Result 508 states and 1390 transitions. [2021-03-10 21:29:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:34,006 INFO L225 Difference]: With dead ends: 508 [2021-03-10 21:29:34,006 INFO L226 Difference]: Without dead ends: 493 [2021-03-10 21:29:34,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-03-10 21:29:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 431. [2021-03-10 21:29:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.969767441860465) internal successors, (1277), 430 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1277 transitions. [2021-03-10 21:29:34,011 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1277 transitions. Word has length 17 [2021-03-10 21:29:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:34,011 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1277 transitions. [2021-03-10 21:29:34,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1277 transitions. [2021-03-10 21:29:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:34,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:34,011 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:34,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1685,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:34,227 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -383381736, now seen corresponding path program 113 times [2021-03-10 21:29:34,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:34,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460386409] [2021-03-10 21:29:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460386409] [2021-03-10 21:29:34,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189808171] [2021-03-10 21:29:34,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:34,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:34,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:34,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835877609] [2021-03-10 21:29:34,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:34,308 INFO L87 Difference]: Start difference. First operand 431 states and 1277 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:34,394 INFO L93 Difference]: Finished difference Result 511 states and 1418 transitions. [2021-03-10 21:29:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:34,395 INFO L225 Difference]: With dead ends: 511 [2021-03-10 21:29:34,395 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 21:29:34,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 21:29:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 438. [2021-03-10 21:29:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.9702517162471396) internal successors, (1298), 437 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1298 transitions. [2021-03-10 21:29:34,400 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1298 transitions. Word has length 17 [2021-03-10 21:29:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:34,400 INFO L480 AbstractCegarLoop]: Abstraction has 438 states and 1298 transitions. [2021-03-10 21:29:34,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1298 transitions. [2021-03-10 21:29:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:34,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:34,400 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:34,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1719,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:34,607 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash 54537651, now seen corresponding path program 114 times [2021-03-10 21:29:34,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:34,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651993175] [2021-03-10 21:29:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651993175] [2021-03-10 21:29:34,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277682170] [2021-03-10 21:29:34,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:34,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:34,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:29:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:34,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:34,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:29:34,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:34,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:34,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:34,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:34,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:29:34,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768230305] [2021-03-10 21:29:34,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:29:34,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:34,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:29:34,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:34,922 INFO L87 Difference]: Start difference. First operand 438 states and 1298 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:35,227 INFO L93 Difference]: Finished difference Result 574 states and 1607 transitions. [2021-03-10 21:29:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:35,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:35,228 INFO L225 Difference]: With dead ends: 574 [2021-03-10 21:29:35,228 INFO L226 Difference]: Without dead ends: 569 [2021-03-10 21:29:35,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:29:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-03-10 21:29:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 440. [2021-03-10 21:29:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.9635535307517085) internal successors, (1301), 439 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1301 transitions. [2021-03-10 21:29:35,233 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1301 transitions. Word has length 17 [2021-03-10 21:29:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:35,233 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1301 transitions. [2021-03-10 21:29:35,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1301 transitions. [2021-03-10 21:29:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:35,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:35,234 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:35,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1720 [2021-03-10 21:29:35,448 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1099753202, now seen corresponding path program 115 times [2021-03-10 21:29:35,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:35,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656615285] [2021-03-10 21:29:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656615285] [2021-03-10 21:29:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281228480] [2021-03-10 21:29:35,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:35,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:35,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423527368] [2021-03-10 21:29:35,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:35,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:35,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:35,531 INFO L87 Difference]: Start difference. First operand 440 states and 1301 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:35,639 INFO L93 Difference]: Finished difference Result 560 states and 1538 transitions. [2021-03-10 21:29:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:29:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:35,640 INFO L225 Difference]: With dead ends: 560 [2021-03-10 21:29:35,640 INFO L226 Difference]: Without dead ends: 560 [2021-03-10 21:29:35,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-03-10 21:29:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 454. [2021-03-10 21:29:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.964679911699779) internal successors, (1343), 453 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1343 transitions. [2021-03-10 21:29:35,645 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1343 transitions. Word has length 17 [2021-03-10 21:29:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:35,645 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1343 transitions. [2021-03-10 21:29:35,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1343 transitions. [2021-03-10 21:29:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:35,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:35,646 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:35,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1752 [2021-03-10 21:29:35,846 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:35,847 INFO L82 PathProgramCache]: Analyzing trace with hash -63868743, now seen corresponding path program 116 times [2021-03-10 21:29:35,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:35,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084597369] [2021-03-10 21:29:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084597369] [2021-03-10 21:29:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966808679] [2021-03-10 21:29:35,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:35,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:35,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:35,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210594412] [2021-03-10 21:29:35,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:35,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:35,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:35,939 INFO L87 Difference]: Start difference. First operand 454 states and 1343 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:36,027 INFO L93 Difference]: Finished difference Result 589 states and 1553 transitions. [2021-03-10 21:29:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:36,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:36,028 INFO L225 Difference]: With dead ends: 589 [2021-03-10 21:29:36,028 INFO L226 Difference]: Without dead ends: 585 [2021-03-10 21:29:36,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-10 21:29:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 449. [2021-03-10 21:29:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.9575892857142856) internal successors, (1325), 448 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1325 transitions. [2021-03-10 21:29:36,033 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1325 transitions. Word has length 18 [2021-03-10 21:29:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:36,033 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1325 transitions. [2021-03-10 21:29:36,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1325 transitions. [2021-03-10 21:29:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:36,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:36,033 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:36,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,234 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:36,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1505890382, now seen corresponding path program 117 times [2021-03-10 21:29:36,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:36,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040302804] [2021-03-10 21:29:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:36,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040302804] [2021-03-10 21:29:36,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606741070] [2021-03-10 21:29:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:36,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:36,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:36,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:36,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:36,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831705070] [2021-03-10 21:29:36,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:36,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:36,323 INFO L87 Difference]: Start difference. First operand 449 states and 1325 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:36,448 INFO L93 Difference]: Finished difference Result 621 states and 1652 transitions. [2021-03-10 21:29:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:36,449 INFO L225 Difference]: With dead ends: 621 [2021-03-10 21:29:36,449 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 21:29:36,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 21:29:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 459. [2021-03-10 21:29:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9519650655021836) internal successors, (1352), 458 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1352 transitions. [2021-03-10 21:29:36,455 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1352 transitions. Word has length 18 [2021-03-10 21:29:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:36,455 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1352 transitions. [2021-03-10 21:29:36,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1352 transitions. [2021-03-10 21:29:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:36,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:36,455 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:36,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-03-10 21:29:36,670 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1639250247, now seen corresponding path program 118 times [2021-03-10 21:29:36,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:36,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410183286] [2021-03-10 21:29:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:36,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410183286] [2021-03-10 21:29:36,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127148483] [2021-03-10 21:29:36,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:36,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:36,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:36,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:36,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745158594] [2021-03-10 21:29:36,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:36,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:36,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:36,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:36,744 INFO L87 Difference]: Start difference. First operand 459 states and 1352 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:36,819 INFO L93 Difference]: Finished difference Result 506 states and 1421 transitions. [2021-03-10 21:29:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:36,820 INFO L225 Difference]: With dead ends: 506 [2021-03-10 21:29:36,820 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 21:29:36,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 21:29:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 459. [2021-03-10 21:29:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.945414847161572) internal successors, (1349), 458 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1349 transitions. [2021-03-10 21:29:36,825 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1349 transitions. Word has length 18 [2021-03-10 21:29:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:36,825 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1349 transitions. [2021-03-10 21:29:36,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1349 transitions. [2021-03-10 21:29:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:36,826 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:36,826 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:37,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1755,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:37,039 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1019692920, now seen corresponding path program 119 times [2021-03-10 21:29:37,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:37,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701313125] [2021-03-10 21:29:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701313125] [2021-03-10 21:29:37,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473107626] [2021-03-10 21:29:37,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:37,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:37,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:37,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:37,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655721107] [2021-03-10 21:29:37,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:37,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:37,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:37,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:37,117 INFO L87 Difference]: Start difference. First operand 459 states and 1349 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:37,161 INFO L93 Difference]: Finished difference Result 603 states and 1587 transitions. [2021-03-10 21:29:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:37,162 INFO L225 Difference]: With dead ends: 603 [2021-03-10 21:29:37,162 INFO L226 Difference]: Without dead ends: 603 [2021-03-10 21:29:37,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-03-10 21:29:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 454. [2021-03-10 21:29:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.933774834437086) internal successors, (1329), 453 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1329 transitions. [2021-03-10 21:29:37,167 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1329 transitions. Word has length 18 [2021-03-10 21:29:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:37,167 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1329 transitions. [2021-03-10 21:29:37,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1329 transitions. [2021-03-10 21:29:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:37,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:37,168 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:37,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1756 [2021-03-10 21:29:37,372 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1889932499, now seen corresponding path program 120 times [2021-03-10 21:29:37,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:37,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292271787] [2021-03-10 21:29:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292271787] [2021-03-10 21:29:37,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812217475] [2021-03-10 21:29:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:37,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:29:37,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:37,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015203403] [2021-03-10 21:29:37,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:37,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:37,474 INFO L87 Difference]: Start difference. First operand 454 states and 1329 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:37,550 INFO L93 Difference]: Finished difference Result 518 states and 1445 transitions. [2021-03-10 21:29:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:37,551 INFO L225 Difference]: With dead ends: 518 [2021-03-10 21:29:37,551 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 21:29:37,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 21:29:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 454. [2021-03-10 21:29:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-03-10 21:29:37,556 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-03-10 21:29:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:37,556 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-03-10 21:29:37,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-03-10 21:29:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:37,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:37,556 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:37,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:37,771 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1513713166, now seen corresponding path program 121 times [2021-03-10 21:29:37,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:37,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774375453] [2021-03-10 21:29:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774375453] [2021-03-10 21:29:37,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505555074] [2021-03-10 21:29:37,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:37,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:37,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164727903] [2021-03-10 21:29:37,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:37,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:37,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:37,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:37,853 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:37,907 INFO L93 Difference]: Finished difference Result 643 states and 1687 transitions. [2021-03-10 21:29:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:37,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:37,908 INFO L225 Difference]: With dead ends: 643 [2021-03-10 21:29:37,908 INFO L226 Difference]: Without dead ends: 643 [2021-03-10 21:29:37,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-03-10 21:29:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 454. [2021-03-10 21:29:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-03-10 21:29:37,913 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-03-10 21:29:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:37,913 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-03-10 21:29:37,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-03-10 21:29:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:37,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:37,914 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:38,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1758 [2021-03-10 21:29:38,124 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:38,124 INFO L82 PathProgramCache]: Analyzing trace with hash 238012123, now seen corresponding path program 122 times [2021-03-10 21:29:38,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:38,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720554177] [2021-03-10 21:29:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:38,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720554177] [2021-03-10 21:29:38,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118936060] [2021-03-10 21:29:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:38,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:38,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:38,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:38,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:38,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:38,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627112102] [2021-03-10 21:29:38,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:38,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:38,225 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:38,267 INFO L93 Difference]: Finished difference Result 607 states and 1609 transitions. [2021-03-10 21:29:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:29:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:38,268 INFO L225 Difference]: With dead ends: 607 [2021-03-10 21:29:38,268 INFO L226 Difference]: Without dead ends: 605 [2021-03-10 21:29:38,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-03-10 21:29:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 455. [2021-03-10 21:29:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.909691629955947) internal successors, (1321), 454 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1321 transitions. [2021-03-10 21:29:38,273 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1321 transitions. Word has length 18 [2021-03-10 21:29:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:38,273 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1321 transitions. [2021-03-10 21:29:38,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1321 transitions. [2021-03-10 21:29:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:38,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:38,273 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:38,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1759,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:38,483 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash -539137476, now seen corresponding path program 123 times [2021-03-10 21:29:38,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:38,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565682495] [2021-03-10 21:29:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:38,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565682495] [2021-03-10 21:29:38,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416787226] [2021-03-10 21:29:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:38,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:29:38,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:38,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:38,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:38,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741988145] [2021-03-10 21:29:38,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:38,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:38,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:38,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:38,553 INFO L87 Difference]: Start difference. First operand 455 states and 1321 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:38,633 INFO L93 Difference]: Finished difference Result 580 states and 1522 transitions. [2021-03-10 21:29:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:38,634 INFO L225 Difference]: With dead ends: 580 [2021-03-10 21:29:38,634 INFO L226 Difference]: Without dead ends: 578 [2021-03-10 21:29:38,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-03-10 21:29:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 463. [2021-03-10 21:29:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-03-10 21:29:38,639 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 18 [2021-03-10 21:29:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:38,639 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-03-10 21:29:38,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-03-10 21:29:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:38,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:38,640 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:38,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-03-10 21:29:38,840 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:38,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1937661, now seen corresponding path program 124 times [2021-03-10 21:29:38,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:38,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732381076] [2021-03-10 21:29:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:38,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732381076] [2021-03-10 21:29:38,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435594257] [2021-03-10 21:29:38,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:38,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:38,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:38,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:38,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814618883] [2021-03-10 21:29:38,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:38,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:38,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:38,918 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:39,014 INFO L93 Difference]: Finished difference Result 556 states and 1501 transitions. [2021-03-10 21:29:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:39,015 INFO L225 Difference]: With dead ends: 556 [2021-03-10 21:29:39,015 INFO L226 Difference]: Without dead ends: 548 [2021-03-10 21:29:39,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-10 21:29:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 441. [2021-03-10 21:29:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.9204545454545454) internal successors, (1285), 440 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1285 transitions. [2021-03-10 21:29:39,020 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1285 transitions. Word has length 18 [2021-03-10 21:29:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:39,020 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1285 transitions. [2021-03-10 21:29:39,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1285 transitions. [2021-03-10 21:29:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:39,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:39,020 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:39,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-03-10 21:29:39,221 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -889383970, now seen corresponding path program 125 times [2021-03-10 21:29:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:39,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311725659] [2021-03-10 21:29:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311725659] [2021-03-10 21:29:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996694697] [2021-03-10 21:29:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:39,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:29:39,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:39,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:39,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660077235] [2021-03-10 21:29:39,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:39,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:39,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:39,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:39,297 INFO L87 Difference]: Start difference. First operand 441 states and 1285 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:39,349 INFO L93 Difference]: Finished difference Result 589 states and 1530 transitions. [2021-03-10 21:29:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:39,350 INFO L225 Difference]: With dead ends: 589 [2021-03-10 21:29:39,350 INFO L226 Difference]: Without dead ends: 589 [2021-03-10 21:29:39,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-03-10 21:29:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 433. [2021-03-10 21:29:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.9074074074074074) internal successors, (1256), 432 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1256 transitions. [2021-03-10 21:29:39,355 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1256 transitions. Word has length 18 [2021-03-10 21:29:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:39,355 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1256 transitions. [2021-03-10 21:29:39,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1256 transitions. [2021-03-10 21:29:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:39,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:39,355 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:39,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1762 [2021-03-10 21:29:39,556 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:39,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1071147719, now seen corresponding path program 126 times [2021-03-10 21:29:39,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:39,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329810014] [2021-03-10 21:29:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329810014] [2021-03-10 21:29:39,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881033315] [2021-03-10 21:29:39,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:39,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:29:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:39,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:39,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:39,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:39,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045675720] [2021-03-10 21:29:39,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:39,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:39,640 INFO L87 Difference]: Start difference. First operand 433 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:39,725 INFO L93 Difference]: Finished difference Result 534 states and 1436 transitions. [2021-03-10 21:29:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:39,726 INFO L225 Difference]: With dead ends: 534 [2021-03-10 21:29:39,726 INFO L226 Difference]: Without dead ends: 528 [2021-03-10 21:29:39,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-03-10 21:29:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 435. [2021-03-10 21:29:39,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8940092165898617) internal successors, (1256), 434 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1256 transitions. [2021-03-10 21:29:39,730 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1256 transitions. Word has length 18 [2021-03-10 21:29:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:39,730 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1256 transitions. [2021-03-10 21:29:39,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1256 transitions. [2021-03-10 21:29:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:39,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:39,731 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:39,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1763,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:39,945 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:39,946 INFO L82 PathProgramCache]: Analyzing trace with hash -351528392, now seen corresponding path program 127 times [2021-03-10 21:29:39,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:39,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106549892] [2021-03-10 21:29:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106549892] [2021-03-10 21:29:39,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640931004] [2021-03-10 21:29:39,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:39,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:40,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:40,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:40,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356561778] [2021-03-10 21:29:40,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:40,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:40,029 INFO L87 Difference]: Start difference. First operand 435 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:40,113 INFO L93 Difference]: Finished difference Result 650 states and 1663 transitions. [2021-03-10 21:29:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:40,123 INFO L225 Difference]: With dead ends: 650 [2021-03-10 21:29:40,123 INFO L226 Difference]: Without dead ends: 650 [2021-03-10 21:29:40,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-03-10 21:29:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 416. [2021-03-10 21:29:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.8891566265060242) internal successors, (1199), 415 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1199 transitions. [2021-03-10 21:29:40,128 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1199 transitions. Word has length 18 [2021-03-10 21:29:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,128 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 1199 transitions. [2021-03-10 21:29:40,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,128 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1199 transitions. [2021-03-10 21:29:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:40,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,129 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:40,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1764 [2021-03-10 21:29:40,329 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1243555061, now seen corresponding path program 128 times [2021-03-10 21:29:40,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:40,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982075709] [2021-03-10 21:29:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:40,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982075709] [2021-03-10 21:29:40,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561656553] [2021-03-10 21:29:40,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:40,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:40,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:40,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:40,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:40,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:40,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514024106] [2021-03-10 21:29:40,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:40,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:40,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:40,405 INFO L87 Difference]: Start difference. First operand 416 states and 1199 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:40,445 INFO L93 Difference]: Finished difference Result 564 states and 1469 transitions. [2021-03-10 21:29:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:29:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:40,446 INFO L225 Difference]: With dead ends: 564 [2021-03-10 21:29:40,446 INFO L226 Difference]: Without dead ends: 562 [2021-03-10 21:29:40,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-10 21:29:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 408. [2021-03-10 21:29:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.8746928746928746) internal successors, (1170), 407 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1170 transitions. [2021-03-10 21:29:40,451 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1170 transitions. Word has length 18 [2021-03-10 21:29:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,451 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1170 transitions. [2021-03-10 21:29:40,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1170 transitions. [2021-03-10 21:29:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:40,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,451 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:40,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1765 [2021-03-10 21:29:40,652 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2020704660, now seen corresponding path program 129 times [2021-03-10 21:29:40,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:40,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546280259] [2021-03-10 21:29:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546280259] [2021-03-10 21:29:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759492057] [2021-03-10 21:29:40,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:40,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:40,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:40,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:40,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899368505] [2021-03-10 21:29:40,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:40,719 INFO L87 Difference]: Start difference. First operand 408 states and 1170 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:40,789 INFO L93 Difference]: Finished difference Result 517 states and 1347 transitions. [2021-03-10 21:29:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:40,790 INFO L225 Difference]: With dead ends: 517 [2021-03-10 21:29:40,790 INFO L226 Difference]: Without dead ends: 515 [2021-03-10 21:29:40,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-10 21:29:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 394. [2021-03-10 21:29:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8575063613231553) internal successors, (1123), 393 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1123 transitions. [2021-03-10 21:29:40,794 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1123 transitions. Word has length 18 [2021-03-10 21:29:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,794 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1123 transitions. [2021-03-10 21:29:40,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1123 transitions. [2021-03-10 21:29:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:40,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,795 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:40,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1766 [2021-03-10 21:29:40,995 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1742252393, now seen corresponding path program 130 times [2021-03-10 21:29:40,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:40,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593291492] [2021-03-10 21:29:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593291492] [2021-03-10 21:29:41,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907947088] [2021-03-10 21:29:41,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:41,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814642307] [2021-03-10 21:29:41,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:41,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:41,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:41,075 INFO L87 Difference]: Start difference. First operand 394 states and 1123 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:41,172 INFO L93 Difference]: Finished difference Result 504 states and 1317 transitions. [2021-03-10 21:29:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:41,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:41,173 INFO L225 Difference]: With dead ends: 504 [2021-03-10 21:29:41,173 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 21:29:41,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 21:29:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 382. [2021-03-10 21:29:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.8451443569553807) internal successors, (1084), 381 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1084 transitions. [2021-03-10 21:29:41,177 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1084 transitions. Word has length 18 [2021-03-10 21:29:41,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:41,177 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1084 transitions. [2021-03-10 21:29:41,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,177 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1084 transitions. [2021-03-10 21:29:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:41,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:41,178 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:41,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,391 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1833095576, now seen corresponding path program 131 times [2021-03-10 21:29:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:41,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932219985] [2021-03-10 21:29:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932219985] [2021-03-10 21:29:41,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423585716] [2021-03-10 21:29:41,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:41,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:41,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063779295] [2021-03-10 21:29:41,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:41,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:41,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:41,474 INFO L87 Difference]: Start difference. First operand 382 states and 1084 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:41,545 INFO L93 Difference]: Finished difference Result 511 states and 1300 transitions. [2021-03-10 21:29:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:41,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:41,546 INFO L225 Difference]: With dead ends: 511 [2021-03-10 21:29:41,546 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 21:29:41,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 21:29:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 377. [2021-03-10 21:29:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8324468085106385) internal successors, (1065), 376 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1065 transitions. [2021-03-10 21:29:41,550 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1065 transitions. Word has length 18 [2021-03-10 21:29:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:41,550 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1065 transitions. [2021-03-10 21:29:41,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1065 transitions. [2021-03-10 21:29:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:41,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:41,550 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:41,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-03-10 21:29:41,751 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:41,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1458623315, now seen corresponding path program 132 times [2021-03-10 21:29:41,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:41,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138950993] [2021-03-10 21:29:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138950993] [2021-03-10 21:29:41,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672374263] [2021-03-10 21:29:41,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:41,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:41,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:41,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518906766] [2021-03-10 21:29:41,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:41,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:41,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:41,836 INFO L87 Difference]: Start difference. First operand 377 states and 1065 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:41,917 INFO L93 Difference]: Finished difference Result 521 states and 1359 transitions. [2021-03-10 21:29:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:41,918 INFO L225 Difference]: With dead ends: 521 [2021-03-10 21:29:41,918 INFO L226 Difference]: Without dead ends: 513 [2021-03-10 21:29:41,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-10 21:29:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 377. [2021-03-10 21:29:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8297872340425534) internal successors, (1064), 376 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1064 transitions. [2021-03-10 21:29:41,922 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1064 transitions. Word has length 18 [2021-03-10 21:29:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:41,922 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1064 transitions. [2021-03-10 21:29:41,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1064 transitions. [2021-03-10 21:29:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:41,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:41,923 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:42,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1769,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:42,123 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1955525454, now seen corresponding path program 133 times [2021-03-10 21:29:42,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:42,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476694947] [2021-03-10 21:29:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476694947] [2021-03-10 21:29:42,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336526866] [2021-03-10 21:29:42,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:42,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:42,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119198172] [2021-03-10 21:29:42,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:42,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:42,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:42,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:42,209 INFO L87 Difference]: Start difference. First operand 377 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:42,314 INFO L93 Difference]: Finished difference Result 650 states and 1689 transitions. [2021-03-10 21:29:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:42,315 INFO L225 Difference]: With dead ends: 650 [2021-03-10 21:29:42,315 INFO L226 Difference]: Without dead ends: 650 [2021-03-10 21:29:42,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-03-10 21:29:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 394. [2021-03-10 21:29:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8066157760814248) internal successors, (1103), 393 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1103 transitions. [2021-03-10 21:29:42,319 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1103 transitions. Word has length 18 [2021-03-10 21:29:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:42,319 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1103 transitions. [2021-03-10 21:29:42,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1103 transitions. [2021-03-10 21:29:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:42,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:42,320 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:42,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-03-10 21:29:42,530 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash 175561913, now seen corresponding path program 134 times [2021-03-10 21:29:42,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:42,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611340441] [2021-03-10 21:29:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611340441] [2021-03-10 21:29:42,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159491105] [2021-03-10 21:29:42,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:42,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:42,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:42,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:42,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:42,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:42,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408954946] [2021-03-10 21:29:42,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:42,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:42,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:42,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:42,607 INFO L87 Difference]: Start difference. First operand 394 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:42,679 INFO L93 Difference]: Finished difference Result 503 states and 1306 transitions. [2021-03-10 21:29:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:42,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:42,680 INFO L225 Difference]: With dead ends: 503 [2021-03-10 21:29:42,680 INFO L226 Difference]: Without dead ends: 503 [2021-03-10 21:29:42,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-03-10 21:29:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 398. [2021-03-10 21:29:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.808564231738035) internal successors, (1115), 397 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1115 transitions. [2021-03-10 21:29:42,684 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1115 transitions. Word has length 18 [2021-03-10 21:29:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:42,684 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1115 transitions. [2021-03-10 21:29:42,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1115 transitions. [2021-03-10 21:29:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:42,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:42,684 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:42,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-03-10 21:29:42,885 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1853728120, now seen corresponding path program 135 times [2021-03-10 21:29:42,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:42,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428779868] [2021-03-10 21:29:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428779868] [2021-03-10 21:29:42,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675221556] [2021-03-10 21:29:42,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:42,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:42,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:42,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:42,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:42,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214235016] [2021-03-10 21:29:42,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:42,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:42,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:42,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:42,957 INFO L87 Difference]: Start difference. First operand 398 states and 1115 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:43,050 INFO L93 Difference]: Finished difference Result 494 states and 1259 transitions. [2021-03-10 21:29:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:43,051 INFO L225 Difference]: With dead ends: 494 [2021-03-10 21:29:43,051 INFO L226 Difference]: Without dead ends: 490 [2021-03-10 21:29:43,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-10 21:29:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 398. [2021-03-10 21:29:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.8060453400503778) internal successors, (1114), 397 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1114 transitions. [2021-03-10 21:29:43,055 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1114 transitions. Word has length 18 [2021-03-10 21:29:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:43,055 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1114 transitions. [2021-03-10 21:29:43,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1114 transitions. [2021-03-10 21:29:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:43,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:43,055 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:43,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-03-10 21:29:43,256 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1124891415, now seen corresponding path program 136 times [2021-03-10 21:29:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:43,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657226751] [2021-03-10 21:29:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657226751] [2021-03-10 21:29:43,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463630657] [2021-03-10 21:29:43,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:43,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:43,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:43,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:43,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763551534] [2021-03-10 21:29:43,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:43,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:43,335 INFO L87 Difference]: Start difference. First operand 398 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:43,426 INFO L93 Difference]: Finished difference Result 544 states and 1417 transitions. [2021-03-10 21:29:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:43,427 INFO L225 Difference]: With dead ends: 544 [2021-03-10 21:29:43,427 INFO L226 Difference]: Without dead ends: 536 [2021-03-10 21:29:43,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-03-10 21:29:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 398. [2021-03-10 21:29:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.7984886649874054) internal successors, (1111), 397 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1111 transitions. [2021-03-10 21:29:43,431 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1111 transitions. Word has length 18 [2021-03-10 21:29:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:43,432 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1111 transitions. [2021-03-10 21:29:43,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1111 transitions. [2021-03-10 21:29:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:43,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:43,432 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:43,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:43,639 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash 244072888, now seen corresponding path program 137 times [2021-03-10 21:29:43,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:43,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505108327] [2021-03-10 21:29:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505108327] [2021-03-10 21:29:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387395197] [2021-03-10 21:29:43,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:43,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:43,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:43,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:43,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410625493] [2021-03-10 21:29:43,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:43,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:43,720 INFO L87 Difference]: Start difference. First operand 398 states and 1111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:43,819 INFO L93 Difference]: Finished difference Result 600 states and 1559 transitions. [2021-03-10 21:29:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:43,820 INFO L225 Difference]: With dead ends: 600 [2021-03-10 21:29:43,820 INFO L226 Difference]: Without dead ends: 600 [2021-03-10 21:29:43,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-03-10 21:29:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 351. [2021-03-10 21:29:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7857142857142856) internal successors, (975), 350 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 975 transitions. [2021-03-10 21:29:43,824 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 975 transitions. Word has length 18 [2021-03-10 21:29:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:43,827 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 975 transitions. [2021-03-10 21:29:43,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 975 transitions. [2021-03-10 21:29:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:43,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:43,827 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:44,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1774 [2021-03-10 21:29:44,028 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash 72502491, now seen corresponding path program 138 times [2021-03-10 21:29:44,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:44,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950002982] [2021-03-10 21:29:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950002982] [2021-03-10 21:29:44,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667749156] [2021-03-10 21:29:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:44,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:44,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:44,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:44,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120164533] [2021-03-10 21:29:44,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:44,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:44,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:44,101 INFO L87 Difference]: Start difference. First operand 351 states and 975 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:44,137 INFO L93 Difference]: Finished difference Result 535 states and 1322 transitions. [2021-03-10 21:29:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:44,137 INFO L225 Difference]: With dead ends: 535 [2021-03-10 21:29:44,137 INFO L226 Difference]: Without dead ends: 535 [2021-03-10 21:29:44,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-10 21:29:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 363. [2021-03-10 21:29:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.820441988950276) internal successors, (1021), 362 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1021 transitions. [2021-03-10 21:29:44,141 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1021 transitions. Word has length 18 [2021-03-10 21:29:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:44,141 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1021 transitions. [2021-03-10 21:29:44,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1021 transitions. [2021-03-10 21:29:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:44,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:44,142 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:44,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-03-10 21:29:44,342 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash -704647108, now seen corresponding path program 139 times [2021-03-10 21:29:44,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:44,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532007742] [2021-03-10 21:29:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532007742] [2021-03-10 21:29:44,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125989933] [2021-03-10 21:29:44,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:44,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:44,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:44,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645090758] [2021-03-10 21:29:44,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:44,413 INFO L87 Difference]: Start difference. First operand 363 states and 1021 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:44,482 INFO L93 Difference]: Finished difference Result 446 states and 1156 transitions. [2021-03-10 21:29:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:44,482 INFO L225 Difference]: With dead ends: 446 [2021-03-10 21:29:44,482 INFO L226 Difference]: Without dead ends: 444 [2021-03-10 21:29:44,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-03-10 21:29:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 371. [2021-03-10 21:29:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.82972972972973) internal successors, (1047), 370 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1047 transitions. [2021-03-10 21:29:44,486 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1047 transitions. Word has length 18 [2021-03-10 21:29:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:44,486 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1047 transitions. [2021-03-10 21:29:44,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1047 transitions. [2021-03-10 21:29:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:44,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:44,487 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:44,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1776,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:44,687 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:44,687 INFO L82 PathProgramCache]: Analyzing trace with hash -163571971, now seen corresponding path program 140 times [2021-03-10 21:29:44,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:44,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728984325] [2021-03-10 21:29:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728984325] [2021-03-10 21:29:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884480075] [2021-03-10 21:29:44,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:44,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:44,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:44,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:44,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478421575] [2021-03-10 21:29:44,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:44,761 INFO L87 Difference]: Start difference. First operand 371 states and 1047 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:44,850 INFO L93 Difference]: Finished difference Result 529 states and 1322 transitions. [2021-03-10 21:29:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:44,850 INFO L225 Difference]: With dead ends: 529 [2021-03-10 21:29:44,851 INFO L226 Difference]: Without dead ends: 523 [2021-03-10 21:29:44,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-10 21:29:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 371. [2021-03-10 21:29:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.8189189189189188) internal successors, (1043), 370 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1043 transitions. [2021-03-10 21:29:44,854 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1043 transitions. Word has length 18 [2021-03-10 21:29:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:44,854 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1043 transitions. [2021-03-10 21:29:44,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1043 transitions. [2021-03-10 21:29:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:44,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:44,855 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1777 [2021-03-10 21:29:45,059 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1054893602, now seen corresponding path program 141 times [2021-03-10 21:29:45,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264099485] [2021-03-10 21:29:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264099485] [2021-03-10 21:29:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801463684] [2021-03-10 21:29:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:45,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033126455] [2021-03-10 21:29:45,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:45,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:45,135 INFO L87 Difference]: Start difference. First operand 371 states and 1043 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,193 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2021-03-10 21:29:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:45,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:45,193 INFO L225 Difference]: With dead ends: 464 [2021-03-10 21:29:45,193 INFO L226 Difference]: Without dead ends: 464 [2021-03-10 21:29:45,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-03-10 21:29:45,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 353. [2021-03-10 21:29:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.7954545454545454) internal successors, (984), 352 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 984 transitions. [2021-03-10 21:29:45,197 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 984 transitions. Word has length 18 [2021-03-10 21:29:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:45,197 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 984 transitions. [2021-03-10 21:29:45,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 984 transitions. [2021-03-10 21:29:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:45,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:45,198 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,398 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash -142565763, now seen corresponding path program 142 times [2021-03-10 21:29:45,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215988621] [2021-03-10 21:29:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215988621] [2021-03-10 21:29:45,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555542330] [2021-03-10 21:29:45,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:45,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:45,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914427988] [2021-03-10 21:29:45,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:45,491 INFO L87 Difference]: Start difference. First operand 353 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,599 INFO L93 Difference]: Finished difference Result 494 states and 1235 transitions. [2021-03-10 21:29:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:45,600 INFO L225 Difference]: With dead ends: 494 [2021-03-10 21:29:45,600 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 21:29:45,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 21:29:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 359. [2021-03-10 21:29:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.776536312849162) internal successors, (994), 358 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 994 transitions. [2021-03-10 21:29:45,603 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 994 transitions. Word has length 18 [2021-03-10 21:29:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:45,603 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 994 transitions. [2021-03-10 21:29:45,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 994 transitions. [2021-03-10 21:29:45,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:45,604 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:45,604 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1779,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,804 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1023384290, now seen corresponding path program 143 times [2021-03-10 21:29:45,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847493097] [2021-03-10 21:29:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847493097] [2021-03-10 21:29:45,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708762148] [2021-03-10 21:29:45,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:45,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:45,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007826230] [2021-03-10 21:29:45,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:45,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:45,894 INFO L87 Difference]: Start difference. First operand 359 states and 994 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,981 INFO L93 Difference]: Finished difference Result 473 states and 1180 transitions. [2021-03-10 21:29:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:45,982 INFO L225 Difference]: With dead ends: 473 [2021-03-10 21:29:45,982 INFO L226 Difference]: Without dead ends: 473 [2021-03-10 21:29:45,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-10 21:29:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 306. [2021-03-10 21:29:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.7147540983606557) internal successors, (828), 305 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 828 transitions. [2021-03-10 21:29:45,985 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 828 transitions. Word has length 18 [2021-03-10 21:29:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:45,985 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 828 transitions. [2021-03-10 21:29:45,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 828 transitions. [2021-03-10 21:29:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:45,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:45,986 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:46,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1780,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:46,186 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -585464903, now seen corresponding path program 144 times [2021-03-10 21:29:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:46,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834229468] [2021-03-10 21:29:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834229468] [2021-03-10 21:29:46,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238527890] [2021-03-10 21:29:46,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:46,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:46,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:46,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278025423] [2021-03-10 21:29:46,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:46,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:46,276 INFO L87 Difference]: Start difference. First operand 306 states and 828 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:46,349 INFO L93 Difference]: Finished difference Result 550 states and 1344 transitions. [2021-03-10 21:29:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:46,350 INFO L225 Difference]: With dead ends: 550 [2021-03-10 21:29:46,350 INFO L226 Difference]: Without dead ends: 540 [2021-03-10 21:29:46,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-03-10 21:29:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 317. [2021-03-10 21:29:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6835443037974684) internal successors, (848), 316 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 848 transitions. [2021-03-10 21:29:46,354 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 848 transitions. Word has length 18 [2021-03-10 21:29:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:46,354 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 848 transitions. [2021-03-10 21:29:46,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 848 transitions. [2021-03-10 21:29:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:46,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:46,355 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:46,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-03-10 21:29:46,569 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash 459750648, now seen corresponding path program 145 times [2021-03-10 21:29:46,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:46,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92770257] [2021-03-10 21:29:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92770257] [2021-03-10 21:29:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730536971] [2021-03-10 21:29:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:46,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:46,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:46,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:46,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852998876] [2021-03-10 21:29:46,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:46,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:46,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:46,661 INFO L87 Difference]: Start difference. First operand 317 states and 848 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:46,796 INFO L93 Difference]: Finished difference Result 534 states and 1298 transitions. [2021-03-10 21:29:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:46,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:46,796 INFO L225 Difference]: With dead ends: 534 [2021-03-10 21:29:46,796 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 21:29:46,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 21:29:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 351. [2021-03-10 21:29:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7085714285714286) internal successors, (948), 350 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 948 transitions. [2021-03-10 21:29:46,800 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 948 transitions. Word has length 18 [2021-03-10 21:29:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:46,800 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 948 transitions. [2021-03-10 21:29:46,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 948 transitions. [2021-03-10 21:29:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:46,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:46,800 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:47,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-03-10 21:29:47,001 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1339860081, now seen corresponding path program 146 times [2021-03-10 21:29:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:47,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008742963] [2021-03-10 21:29:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008742963] [2021-03-10 21:29:47,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082267661] [2021-03-10 21:29:47,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:47,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:47,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:47,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:47,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:47,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158617046] [2021-03-10 21:29:47,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:47,082 INFO L87 Difference]: Start difference. First operand 351 states and 948 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:47,154 INFO L93 Difference]: Finished difference Result 539 states and 1303 transitions. [2021-03-10 21:29:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:47,155 INFO L225 Difference]: With dead ends: 539 [2021-03-10 21:29:47,155 INFO L226 Difference]: Without dead ends: 539 [2021-03-10 21:29:47,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-10 21:29:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 380. [2021-03-10 21:29:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.7651715039577835) internal successors, (1048), 379 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1048 transitions. [2021-03-10 21:29:47,159 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1048 transitions. Word has length 18 [2021-03-10 21:29:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:47,159 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1048 transitions. [2021-03-10 21:29:47,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1048 transitions. [2021-03-10 21:29:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:47,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:47,159 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:47,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-03-10 21:29:47,360 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash 338306126, now seen corresponding path program 147 times [2021-03-10 21:29:47,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:47,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201685051] [2021-03-10 21:29:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201685051] [2021-03-10 21:29:47,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330841471] [2021-03-10 21:29:47,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:47,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:29:47,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:47,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:47,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:47,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:29:47,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428224499] [2021-03-10 21:29:47,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:47,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:47,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:47,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:47,444 INFO L87 Difference]: Start difference. First operand 380 states and 1048 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:47,560 INFO L93 Difference]: Finished difference Result 531 states and 1311 transitions. [2021-03-10 21:29:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:47,561 INFO L225 Difference]: With dead ends: 531 [2021-03-10 21:29:47,561 INFO L226 Difference]: Without dead ends: 527 [2021-03-10 21:29:47,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-03-10 21:29:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2021-03-10 21:29:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.7933673469387754) internal successors, (1095), 392 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1095 transitions. [2021-03-10 21:29:47,568 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1095 transitions. Word has length 18 [2021-03-10 21:29:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:47,568 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 1095 transitions. [2021-03-10 21:29:47,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1095 transitions. [2021-03-10 21:29:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:47,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:47,568 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:47,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-03-10 21:29:47,769 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash 879381263, now seen corresponding path program 148 times [2021-03-10 21:29:47,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:47,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662790018] [2021-03-10 21:29:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662790018] [2021-03-10 21:29:47,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123616487] [2021-03-10 21:29:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:47,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:47,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:47,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:47,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:47,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54066813] [2021-03-10 21:29:47,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:47,847 INFO L87 Difference]: Start difference. First operand 393 states and 1095 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:47,936 INFO L93 Difference]: Finished difference Result 519 states and 1293 transitions. [2021-03-10 21:29:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:47,937 INFO L225 Difference]: With dead ends: 519 [2021-03-10 21:29:47,937 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 21:29:47,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 21:29:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 391. [2021-03-10 21:29:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.7974358974358973) internal successors, (1091), 390 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1091 transitions. [2021-03-10 21:29:47,941 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1091 transitions. Word has length 18 [2021-03-10 21:29:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:47,941 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1091 transitions. [2021-03-10 21:29:47,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1091 transitions. [2021-03-10 21:29:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:47,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:47,941 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-03-10 21:29:48,142 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash -756642866, now seen corresponding path program 149 times [2021-03-10 21:29:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825765163] [2021-03-10 21:29:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825765163] [2021-03-10 21:29:48,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929961824] [2021-03-10 21:29:48,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:48,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:29:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:48,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:48,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:48,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882858919] [2021-03-10 21:29:48,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:48,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:48,224 INFO L87 Difference]: Start difference. First operand 391 states and 1091 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:48,270 INFO L93 Difference]: Finished difference Result 530 states and 1322 transitions. [2021-03-10 21:29:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:48,271 INFO L225 Difference]: With dead ends: 530 [2021-03-10 21:29:48,271 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 21:29:48,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 21:29:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-03-10 21:29:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.78772378516624) internal successors, (1090), 391 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1090 transitions. [2021-03-10 21:29:48,277 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1090 transitions. Word has length 18 [2021-03-10 21:29:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:48,277 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1090 transitions. [2021-03-10 21:29:48,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1090 transitions. [2021-03-10 21:29:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:48,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:48,277 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1786,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:48,478 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2100886897, now seen corresponding path program 150 times [2021-03-10 21:29:48,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769339626] [2021-03-10 21:29:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769339626] [2021-03-10 21:29:48,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126944093] [2021-03-10 21:29:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:48,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:48,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:48,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83639295] [2021-03-10 21:29:48,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:48,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:48,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:48,563 INFO L87 Difference]: Start difference. First operand 392 states and 1090 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:48,659 INFO L93 Difference]: Finished difference Result 597 states and 1517 transitions. [2021-03-10 21:29:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:48,660 INFO L225 Difference]: With dead ends: 597 [2021-03-10 21:29:48,660 INFO L226 Difference]: Without dead ends: 587 [2021-03-10 21:29:48,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-03-10 21:29:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 392. [2021-03-10 21:29:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.785166240409207) internal successors, (1089), 391 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1089 transitions. [2021-03-10 21:29:48,665 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1089 transitions. Word has length 18 [2021-03-10 21:29:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:48,665 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1089 transitions. [2021-03-10 21:29:48,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1089 transitions. [2021-03-10 21:29:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:48,665 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:48,665 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1787 [2021-03-10 21:29:48,866 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1055671346, now seen corresponding path program 151 times [2021-03-10 21:29:48,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456946053] [2021-03-10 21:29:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456946053] [2021-03-10 21:29:48,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021368702] [2021-03-10 21:29:48,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:48,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:48,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277964900] [2021-03-10 21:29:48,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:48,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:48,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:48,957 INFO L87 Difference]: Start difference. First operand 392 states and 1089 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:49,086 INFO L93 Difference]: Finished difference Result 529 states and 1361 transitions. [2021-03-10 21:29:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:49,086 INFO L225 Difference]: With dead ends: 529 [2021-03-10 21:29:49,087 INFO L226 Difference]: Without dead ends: 529 [2021-03-10 21:29:49,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-03-10 21:29:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 385. [2021-03-10 21:29:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.78125) internal successors, (1068), 384 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1068 transitions. [2021-03-10 21:29:49,091 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1068 transitions. Word has length 18 [2021-03-10 21:29:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:49,091 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 1068 transitions. [2021-03-10 21:29:49,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1068 transitions. [2021-03-10 21:29:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:49,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:49,091 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:49,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1788,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,293 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2079386357, now seen corresponding path program 152 times [2021-03-10 21:29:49,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:49,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778355973] [2021-03-10 21:29:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778355973] [2021-03-10 21:29:49,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075139677] [2021-03-10 21:29:49,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:49,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:49,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:49,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090953097] [2021-03-10 21:29:49,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:49,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:49,369 INFO L87 Difference]: Start difference. First operand 385 states and 1068 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:49,416 INFO L93 Difference]: Finished difference Result 612 states and 1535 transitions. [2021-03-10 21:29:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:49,417 INFO L225 Difference]: With dead ends: 612 [2021-03-10 21:29:49,417 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 21:29:49,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 21:29:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 441. [2021-03-10 21:29:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8545454545454545) internal successors, (1256), 440 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1256 transitions. [2021-03-10 21:29:49,424 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1256 transitions. Word has length 18 [2021-03-10 21:29:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:49,424 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1256 transitions. [2021-03-10 21:29:49,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1256 transitions. [2021-03-10 21:29:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:49,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:49,425 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:49,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1789,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,625 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:49,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1438431340, now seen corresponding path program 153 times [2021-03-10 21:29:49,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:49,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884042453] [2021-03-10 21:29:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884042453] [2021-03-10 21:29:49,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960570850] [2021-03-10 21:29:49,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:49,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:29:49,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:49,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:49,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293058680] [2021-03-10 21:29:49,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:49,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:49,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:49,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:49,712 INFO L87 Difference]: Start difference. First operand 441 states and 1256 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:49,805 INFO L93 Difference]: Finished difference Result 564 states and 1468 transitions. [2021-03-10 21:29:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:49,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:49,806 INFO L225 Difference]: With dead ends: 564 [2021-03-10 21:29:49,806 INFO L226 Difference]: Without dead ends: 562 [2021-03-10 21:29:49,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-10 21:29:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 455. [2021-03-10 21:29:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8788546255506606) internal successors, (1307), 454 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1307 transitions. [2021-03-10 21:29:49,811 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1307 transitions. Word has length 18 [2021-03-10 21:29:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:49,811 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1307 transitions. [2021-03-10 21:29:49,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1307 transitions. [2021-03-10 21:29:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:49,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:49,812 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:50,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,012 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 490101481, now seen corresponding path program 154 times [2021-03-10 21:29:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:50,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56601845] [2021-03-10 21:29:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56601845] [2021-03-10 21:29:50,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492876127] [2021-03-10 21:29:50,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:50,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:50,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:50,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120317243] [2021-03-10 21:29:50,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:50,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:50,091 INFO L87 Difference]: Start difference. First operand 455 states and 1307 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:50,183 INFO L93 Difference]: Finished difference Result 609 states and 1555 transitions. [2021-03-10 21:29:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:50,184 INFO L225 Difference]: With dead ends: 609 [2021-03-10 21:29:50,184 INFO L226 Difference]: Without dead ends: 607 [2021-03-10 21:29:50,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-03-10 21:29:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 455. [2021-03-10 21:29:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8766519823788546) internal successors, (1306), 454 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1306 transitions. [2021-03-10 21:29:50,189 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1306 transitions. Word has length 18 [2021-03-10 21:29:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:50,190 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1306 transitions. [2021-03-10 21:29:50,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1306 transitions. [2021-03-10 21:29:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:50,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:50,190 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:50,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1791,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,391 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:50,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:50,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1145922648, now seen corresponding path program 155 times [2021-03-10 21:29:50,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:50,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055658271] [2021-03-10 21:29:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055658271] [2021-03-10 21:29:50,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305440055] [2021-03-10 21:29:50,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:29:50,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:50,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:50,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602687667] [2021-03-10 21:29:50,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:50,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:50,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:50,468 INFO L87 Difference]: Start difference. First operand 455 states and 1306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:50,528 INFO L93 Difference]: Finished difference Result 584 states and 1520 transitions. [2021-03-10 21:29:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:50,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:50,529 INFO L225 Difference]: With dead ends: 584 [2021-03-10 21:29:50,529 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 21:29:50,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 21:29:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 459. [2021-03-10 21:29:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8777292576419216) internal successors, (1318), 458 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1318 transitions. [2021-03-10 21:29:50,534 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1318 transitions. Word has length 18 [2021-03-10 21:29:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:50,534 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1318 transitions. [2021-03-10 21:29:50,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1318 transitions. [2021-03-10 21:29:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:50,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:50,534 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:50,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1792 [2021-03-10 21:29:50,735 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1979506477, now seen corresponding path program 156 times [2021-03-10 21:29:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:50,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122069611] [2021-03-10 21:29:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122069611] [2021-03-10 21:29:50,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799232449] [2021-03-10 21:29:50,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:50,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:50,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:50,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:50,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447696247] [2021-03-10 21:29:50,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:50,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:50,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:50,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:50,806 INFO L87 Difference]: Start difference. First operand 459 states and 1318 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:50,886 INFO L93 Difference]: Finished difference Result 652 states and 1678 transitions. [2021-03-10 21:29:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:50,887 INFO L225 Difference]: With dead ends: 652 [2021-03-10 21:29:50,887 INFO L226 Difference]: Without dead ends: 648 [2021-03-10 21:29:50,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-03-10 21:29:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 459. [2021-03-10 21:29:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8755458515283845) internal successors, (1317), 458 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1317 transitions. [2021-03-10 21:29:50,892 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1317 transitions. Word has length 18 [2021-03-10 21:29:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:50,892 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1317 transitions. [2021-03-10 21:29:50,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1317 transitions. [2021-03-10 21:29:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:50,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:50,892 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:51,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1793 [2021-03-10 21:29:51,093 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1088184846, now seen corresponding path program 157 times [2021-03-10 21:29:51,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:51,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004281860] [2021-03-10 21:29:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004281860] [2021-03-10 21:29:51,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271156039] [2021-03-10 21:29:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:51,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:51,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:51,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961770412] [2021-03-10 21:29:51,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:51,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:51,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:51,169 INFO L87 Difference]: Start difference. First operand 459 states and 1317 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:51,243 INFO L93 Difference]: Finished difference Result 559 states and 1507 transitions. [2021-03-10 21:29:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:51,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:51,244 INFO L225 Difference]: With dead ends: 559 [2021-03-10 21:29:51,244 INFO L226 Difference]: Without dead ends: 559 [2021-03-10 21:29:51,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-03-10 21:29:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-03-10 21:29:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.882978723404255) internal successors, (1355), 470 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1355 transitions. [2021-03-10 21:29:51,249 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1355 transitions. Word has length 18 [2021-03-10 21:29:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:51,249 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1355 transitions. [2021-03-10 21:29:51,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1355 transitions. [2021-03-10 21:29:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:51,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:51,249 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:51,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1794,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:51,450 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:51,450 INFO L82 PathProgramCache]: Analyzing trace with hash 906421097, now seen corresponding path program 158 times [2021-03-10 21:29:51,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:51,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026693122] [2021-03-10 21:29:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026693122] [2021-03-10 21:29:51,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853044530] [2021-03-10 21:29:51,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:51,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:51,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:51,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097282477] [2021-03-10 21:29:51,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:51,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:51,530 INFO L87 Difference]: Start difference. First operand 471 states and 1355 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:51,620 INFO L93 Difference]: Finished difference Result 682 states and 1750 transitions. [2021-03-10 21:29:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:51,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:51,621 INFO L225 Difference]: With dead ends: 682 [2021-03-10 21:29:51,621 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 21:29:51,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 21:29:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 482. [2021-03-10 21:29:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.9022869022869022) internal successors, (1396), 481 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1396 transitions. [2021-03-10 21:29:51,626 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1396 transitions. Word has length 18 [2021-03-10 21:29:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:51,626 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1396 transitions. [2021-03-10 21:29:51,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1396 transitions. [2021-03-10 21:29:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:51,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:51,626 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:51,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-03-10 21:29:51,831 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1626040424, now seen corresponding path program 159 times [2021-03-10 21:29:51,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:51,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451757114] [2021-03-10 21:29:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451757114] [2021-03-10 21:29:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305966059] [2021-03-10 21:29:51,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:51,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:51,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:51,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956625773] [2021-03-10 21:29:51,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:51,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:51,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:51,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:51,922 INFO L87 Difference]: Start difference. First operand 482 states and 1396 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:51,998 INFO L93 Difference]: Finished difference Result 581 states and 1569 transitions. [2021-03-10 21:29:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:51,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:51,999 INFO L225 Difference]: With dead ends: 581 [2021-03-10 21:29:51,999 INFO L226 Difference]: Without dead ends: 579 [2021-03-10 21:29:51,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-10 21:29:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 483. [2021-03-10 21:29:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9024896265560165) internal successors, (1399), 482 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1399 transitions. [2021-03-10 21:29:52,004 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1399 transitions. Word has length 18 [2021-03-10 21:29:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:52,004 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 1399 transitions. [2021-03-10 21:29:52,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1399 transitions. [2021-03-10 21:29:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:52,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:52,004 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:52,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-03-10 21:29:52,205 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1119694158, now seen corresponding path program 160 times [2021-03-10 21:29:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:52,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651913356] [2021-03-10 21:29:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:52,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651913356] [2021-03-10 21:29:52,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960664107] [2021-03-10 21:29:52,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:52,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:52,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:52,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:52,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:52,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916907851] [2021-03-10 21:29:52,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:52,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:52,287 INFO L87 Difference]: Start difference. First operand 483 states and 1399 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:52,340 INFO L93 Difference]: Finished difference Result 540 states and 1521 transitions. [2021-03-10 21:29:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:29:52,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:52,341 INFO L225 Difference]: With dead ends: 540 [2021-03-10 21:29:52,341 INFO L226 Difference]: Without dead ends: 540 [2021-03-10 21:29:52,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-03-10 21:29:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 503. [2021-03-10 21:29:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.902390438247012) internal successors, (1457), 502 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1457 transitions. [2021-03-10 21:29:52,345 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1457 transitions. Word has length 18 [2021-03-10 21:29:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:52,346 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1457 transitions. [2021-03-10 21:29:52,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1457 transitions. [2021-03-10 21:29:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:52,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:52,346 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:52,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-03-10 21:29:52,547 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1557613545, now seen corresponding path program 161 times [2021-03-10 21:29:52,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:52,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871013059] [2021-03-10 21:29:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871013059] [2021-03-10 21:29:52,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794624482] [2021-03-10 21:29:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:52,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:52,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:52,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:52,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:52,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091652711] [2021-03-10 21:29:52,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:52,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:52,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:52,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:52,632 INFO L87 Difference]: Start difference. First operand 503 states and 1457 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:52,741 INFO L93 Difference]: Finished difference Result 774 states and 2053 transitions. [2021-03-10 21:29:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:52,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:52,742 INFO L225 Difference]: With dead ends: 774 [2021-03-10 21:29:52,742 INFO L226 Difference]: Without dead ends: 764 [2021-03-10 21:29:52,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-03-10 21:29:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 506. [2021-03-10 21:29:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-03-10 21:29:52,747 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-03-10 21:29:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:52,747 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-03-10 21:29:52,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-03-10 21:29:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:52,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:52,748 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:52,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:52,948 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1692138200, now seen corresponding path program 162 times [2021-03-10 21:29:52,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:52,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985408644] [2021-03-10 21:29:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985408644] [2021-03-10 21:29:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050864215] [2021-03-10 21:29:52,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:53,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:53,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:53,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:53,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371011986] [2021-03-10 21:29:53,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:53,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:53,038 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:53,142 INFO L93 Difference]: Finished difference Result 573 states and 1584 transitions. [2021-03-10 21:29:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:53,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:53,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:53,143 INFO L225 Difference]: With dead ends: 573 [2021-03-10 21:29:53,143 INFO L226 Difference]: Without dead ends: 573 [2021-03-10 21:29:53,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:53,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-10 21:29:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 506. [2021-03-10 21:29:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-03-10 21:29:53,148 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-03-10 21:29:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:53,148 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-03-10 21:29:53,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-03-10 21:29:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:53,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:53,149 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:53,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1799 [2021-03-10 21:29:53,349 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:53,349 INFO L82 PathProgramCache]: Analyzing trace with hash 712642093, now seen corresponding path program 163 times [2021-03-10 21:29:53,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:53,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213411683] [2021-03-10 21:29:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213411683] [2021-03-10 21:29:53,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651915067] [2021-03-10 21:29:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:53,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:53,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:53,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869303290] [2021-03-10 21:29:53,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:53,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:53,436 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:53,487 INFO L93 Difference]: Finished difference Result 683 states and 1838 transitions. [2021-03-10 21:29:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:53,488 INFO L225 Difference]: With dead ends: 683 [2021-03-10 21:29:53,488 INFO L226 Difference]: Without dead ends: 671 [2021-03-10 21:29:53,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-03-10 21:29:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 504. [2021-03-10 21:29:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9025844930417497) internal successors, (1460), 503 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1460 transitions. [2021-03-10 21:29:53,493 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1460 transitions. Word has length 18 [2021-03-10 21:29:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:53,493 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 1460 transitions. [2021-03-10 21:29:53,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1460 transitions. [2021-03-10 21:29:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:53,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:53,494 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:53,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1800,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:53,694 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1335371918, now seen corresponding path program 164 times [2021-03-10 21:29:53,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:53,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542899985] [2021-03-10 21:29:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542899985] [2021-03-10 21:29:53,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951158945] [2021-03-10 21:29:53,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:53,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:53,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:53,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:29:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:53,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:29:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472860256] [2021-03-10 21:29:53,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:29:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:29:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:53,787 INFO L87 Difference]: Start difference. First operand 504 states and 1460 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:53,908 INFO L93 Difference]: Finished difference Result 652 states and 1786 transitions. [2021-03-10 21:29:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:53,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:29:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:53,909 INFO L225 Difference]: With dead ends: 652 [2021-03-10 21:29:53,909 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 21:29:53,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:53,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 21:29:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 525. [2021-03-10 21:29:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.895038167938931) internal successors, (1517), 524 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1517 transitions. [2021-03-10 21:29:53,914 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1517 transitions. Word has length 18 [2021-03-10 21:29:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:53,914 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 1517 transitions. [2021-03-10 21:29:53,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1517 transitions. [2021-03-10 21:29:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:29:53,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:53,915 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:54,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1801 [2021-03-10 21:29:54,115 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:54,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1154319608, now seen corresponding path program 165 times [2021-03-10 21:29:54,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:54,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692174287] [2021-03-10 21:29:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692174287] [2021-03-10 21:29:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126924794] [2021-03-10 21:29:54,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:54,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:54,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:54,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:29:54,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:54,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:54,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:29:54,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:54,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:54,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:54,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:29:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:54,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:29:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594044512] [2021-03-10 21:29:54,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:29:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:29:54,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:29:54,639 INFO L87 Difference]: Start difference. First operand 525 states and 1517 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:54,956 INFO L93 Difference]: Finished difference Result 604 states and 1671 transitions. [2021-03-10 21:29:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:54,956 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:29:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:54,957 INFO L225 Difference]: With dead ends: 604 [2021-03-10 21:29:54,957 INFO L226 Difference]: Without dead ends: 571 [2021-03-10 21:29:54,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:29:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-10 21:29:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 540. [2021-03-10 21:29:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.8923933209647497) internal successors, (1559), 539 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1559 transitions. [2021-03-10 21:29:54,962 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1559 transitions. Word has length 19 [2021-03-10 21:29:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:54,962 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1559 transitions. [2021-03-10 21:29:54,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1559 transitions. [2021-03-10 21:29:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:29:54,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:54,962 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:55,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1802,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:55,163 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:55,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1640517070, now seen corresponding path program 166 times [2021-03-10 21:29:55,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:55,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789991823] [2021-03-10 21:29:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789991823] [2021-03-10 21:29:55,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80472266] [2021-03-10 21:29:55,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:55,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:55,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:29:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:55,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:55,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:29:55,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:55,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:55,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:55,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:29:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:55,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:55,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:29:55,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370982554] [2021-03-10 21:29:55,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:29:55,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:29:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:55,609 INFO L87 Difference]: Start difference. First operand 540 states and 1559 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:55,910 INFO L93 Difference]: Finished difference Result 625 states and 1734 transitions. [2021-03-10 21:29:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:29:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:55,911 INFO L225 Difference]: With dead ends: 625 [2021-03-10 21:29:55,911 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 21:29:55,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 21:29:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 556. [2021-03-10 21:29:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-03-10 21:29:55,916 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-03-10 21:29:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:55,916 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-03-10 21:29:55,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-03-10 21:29:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:29:55,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:55,917 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:56,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1900 [2021-03-10 21:29:56,117 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash -781642540, now seen corresponding path program 167 times [2021-03-10 21:29:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:56,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889634245] [2021-03-10 21:29:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:56,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889634245] [2021-03-10 21:29:56,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408781720] [2021-03-10 21:29:56,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:56,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:56,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:29:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:56,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:56,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:29:56,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:56,657 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:29:56,658 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:29:56,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:29:56,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:29:56,767 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:29:56,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:56,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:29:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:56,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:56,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:29:56,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313609622] [2021-03-10 21:29:56,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:29:56,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:29:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:56,795 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:57,163 INFO L93 Difference]: Finished difference Result 644 states and 1778 transitions. [2021-03-10 21:29:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:29:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:57,164 INFO L225 Difference]: With dead ends: 644 [2021-03-10 21:29:57,164 INFO L226 Difference]: Without dead ends: 634 [2021-03-10 21:29:57,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-03-10 21:29:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 556. [2021-03-10 21:29:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-03-10 21:29:57,169 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-03-10 21:29:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:57,170 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-03-10 21:29:57,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-03-10 21:29:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:29:57,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:57,170 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:57,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1962,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:57,379 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1146496824, now seen corresponding path program 168 times [2021-03-10 21:29:57,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:57,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178053851] [2021-03-10 21:29:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:57,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178053851] [2021-03-10 21:29:57,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269548946] [2021-03-10 21:29:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:57,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:57,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:57,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:29:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:57,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:57,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:29:57,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:57,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:57,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:57,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:29:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:57,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:57,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:29:57,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48695156] [2021-03-10 21:29:57,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:29:57,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:29:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:57,808 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:58,055 INFO L93 Difference]: Finished difference Result 654 states and 1848 transitions. [2021-03-10 21:29:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:29:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:58,056 INFO L225 Difference]: With dead ends: 654 [2021-03-10 21:29:58,056 INFO L226 Difference]: Without dead ends: 638 [2021-03-10 21:29:58,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-03-10 21:29:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 585. [2021-03-10 21:29:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9366438356164384) internal successors, (1715), 584 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1715 transitions. [2021-03-10 21:29:58,062 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1715 transitions. Word has length 19 [2021-03-10 21:29:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:58,062 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1715 transitions. [2021-03-10 21:29:58,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1715 transitions. [2021-03-10 21:29:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:29:58,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:58,063 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:58,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2080 [2021-03-10 21:29:58,263 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash -287622294, now seen corresponding path program 169 times [2021-03-10 21:29:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:58,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185750491] [2021-03-10 21:29:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:58,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185750491] [2021-03-10 21:29:58,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564896901] [2021-03-10 21:29:58,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:58,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:29:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:58,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:29:58,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:58,802 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:29:58,802 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:29:58,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:29:58,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:29:58,887 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:29:58,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:58,888 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:29:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:58,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:58,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:29:58,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647869344] [2021-03-10 21:29:58,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:29:58,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:29:58,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:58,915 INFO L87 Difference]: Start difference. First operand 585 states and 1715 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:59,314 INFO L93 Difference]: Finished difference Result 690 states and 1918 transitions. [2021-03-10 21:29:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:29:59,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:29:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:59,315 INFO L225 Difference]: With dead ends: 690 [2021-03-10 21:29:59,315 INFO L226 Difference]: Without dead ends: 671 [2021-03-10 21:29:59,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:29:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-03-10 21:29:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 583. [2021-03-10 21:29:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.929553264604811) internal successors, (1705), 582 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1705 transitions. [2021-03-10 21:29:59,321 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1705 transitions. Word has length 19 [2021-03-10 21:29:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:59,321 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1705 transitions. [2021-03-10 21:29:59,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1705 transitions. [2021-03-10 21:29:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:29:59,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:59,322 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:59,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2128,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:59,522 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:59,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1422991014, now seen corresponding path program 170 times [2021-03-10 21:29:59,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:59,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633250167] [2021-03-10 21:29:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:59,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633250167] [2021-03-10 21:29:59,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806429632] [2021-03-10 21:29:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:59,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:59,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:59,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:29:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:59,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:59,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:29:59,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:00,047 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:00,048 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:00,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:00,152 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:00,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:00,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:00,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:00,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:00,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725319177] [2021-03-10 21:30:00,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:00,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:00,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:00,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:00,180 INFO L87 Difference]: Start difference. First operand 583 states and 1705 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:00,561 INFO L93 Difference]: Finished difference Result 643 states and 1827 transitions. [2021-03-10 21:30:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:30:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:00,562 INFO L225 Difference]: With dead ends: 643 [2021-03-10 21:30:00,562 INFO L226 Difference]: Without dead ends: 633 [2021-03-10 21:30:00,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:30:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-03-10 21:30:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 585. [2021-03-10 21:30:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9297945205479454) internal successors, (1711), 584 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1711 transitions. [2021-03-10 21:30:00,567 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1711 transitions. Word has length 19 [2021-03-10 21:30:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:00,567 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1711 transitions. [2021-03-10 21:30:00,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1711 transitions. [2021-03-10 21:30:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:00,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:00,568 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:00,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-03-10 21:30:00,768 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1095619830, now seen corresponding path program 171 times [2021-03-10 21:30:00,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:00,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046730469] [2021-03-10 21:30:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:30:00,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046730469] [2021-03-10 21:30:00,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079347965] [2021-03-10 21:30:00,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:00,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:30:00,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:00,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:01,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:01,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:01,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:01,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:01,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:01,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:01,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:01,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:30:01,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026075725] [2021-03-10 21:30:01,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:01,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:01,217 INFO L87 Difference]: Start difference. First operand 585 states and 1711 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:01,435 INFO L93 Difference]: Finished difference Result 619 states and 1761 transitions. [2021-03-10 21:30:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:01,436 INFO L225 Difference]: With dead ends: 619 [2021-03-10 21:30:01,436 INFO L226 Difference]: Without dead ends: 601 [2021-03-10 21:30:01,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:30:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-03-10 21:30:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 585. [2021-03-10 21:30:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9263698630136985) internal successors, (1709), 584 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1709 transitions. [2021-03-10 21:30:01,441 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1709 transitions. Word has length 19 [2021-03-10 21:30:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:01,441 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1709 transitions. [2021-03-10 21:30:01,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1709 transitions. [2021-03-10 21:30:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:01,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:01,442 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:01,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-03-10 21:30:01,642 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -980106122, now seen corresponding path program 172 times [2021-03-10 21:30:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:01,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742133532] [2021-03-10 21:30:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:01,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742133532] [2021-03-10 21:30:01,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559802019] [2021-03-10 21:30:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:01,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:01,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:01,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:01,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:01,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:01,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:02,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:02,167 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:02,167 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:02,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:02,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:02,325 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:02,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:02,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:02,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:02,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453196058] [2021-03-10 21:30:02,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:02,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:02,354 INFO L87 Difference]: Start difference. First operand 585 states and 1709 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:02,850 INFO L93 Difference]: Finished difference Result 693 states and 1917 transitions. [2021-03-10 21:30:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:30:02,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:02,852 INFO L225 Difference]: With dead ends: 693 [2021-03-10 21:30:02,852 INFO L226 Difference]: Without dead ends: 683 [2021-03-10 21:30:02,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:30:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-03-10 21:30:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 588. [2021-03-10 21:30:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.9165247018739353) internal successors, (1712), 587 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1712 transitions. [2021-03-10 21:30:02,857 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1712 transitions. Word has length 19 [2021-03-10 21:30:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:02,858 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1712 transitions. [2021-03-10 21:30:02,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1712 transitions. [2021-03-10 21:30:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:02,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:02,858 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:03,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2393,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:03,073 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1283228914, now seen corresponding path program 173 times [2021-03-10 21:30:03,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:03,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890956473] [2021-03-10 21:30:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:03,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890956473] [2021-03-10 21:30:03,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748922479] [2021-03-10 21:30:03,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:03,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:03,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:03,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:03,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:03,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:03,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:03,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:03,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:03,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:03,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:03,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:03,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22360911] [2021-03-10 21:30:03,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:03,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:03,601 INFO L87 Difference]: Start difference. First operand 588 states and 1712 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:03,891 INFO L93 Difference]: Finished difference Result 698 states and 1984 transitions. [2021-03-10 21:30:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:30:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:03,892 INFO L225 Difference]: With dead ends: 698 [2021-03-10 21:30:03,892 INFO L226 Difference]: Without dead ends: 680 [2021-03-10 21:30:03,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-03-10 21:30:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 625. [2021-03-10 21:30:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.948717948717949) internal successors, (1840), 624 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1840 transitions. [2021-03-10 21:30:03,898 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1840 transitions. Word has length 19 [2021-03-10 21:30:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:03,898 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1840 transitions. [2021-03-10 21:30:03,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1840 transitions. [2021-03-10 21:30:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:03,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:03,899 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:04,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2527 [2021-03-10 21:30:04,100 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2142103444, now seen corresponding path program 174 times [2021-03-10 21:30:04,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:04,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582073112] [2021-03-10 21:30:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:04,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582073112] [2021-03-10 21:30:04,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124315519] [2021-03-10 21:30:04,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:04,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:30:04,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:04,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:04,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:04,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:04,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:04,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:04,665 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:04,665 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:04,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:04,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:04,787 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:04,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:04,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:04,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:04,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:04,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93892009] [2021-03-10 21:30:04,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:04,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:04,815 INFO L87 Difference]: Start difference. First operand 625 states and 1840 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:05,430 INFO L93 Difference]: Finished difference Result 768 states and 2131 transitions. [2021-03-10 21:30:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:30:05,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:05,431 INFO L225 Difference]: With dead ends: 768 [2021-03-10 21:30:05,431 INFO L226 Difference]: Without dead ends: 742 [2021-03-10 21:30:05,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:30:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-03-10 21:30:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 627. [2021-03-10 21:30:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.9472843450479234) internal successors, (1845), 626 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1845 transitions. [2021-03-10 21:30:05,437 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1845 transitions. Word has length 19 [2021-03-10 21:30:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:05,437 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 1845 transitions. [2021-03-10 21:30:05,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1845 transitions. [2021-03-10 21:30:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:05,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:05,438 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:05,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2595 [2021-03-10 21:30:05,639 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash -442250544, now seen corresponding path program 175 times [2021-03-10 21:30:05,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:05,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655722103] [2021-03-10 21:30:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:05,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655722103] [2021-03-10 21:30:05,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089097940] [2021-03-10 21:30:05,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:05,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:05,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:05,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:06,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:06,227 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:06,227 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:06,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:06,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:06,391 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:06,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:06,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:06,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:06,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:06,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786116846] [2021-03-10 21:30:06,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:06,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:06,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:06,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:06,419 INFO L87 Difference]: Start difference. First operand 627 states and 1845 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:07,002 INFO L93 Difference]: Finished difference Result 816 states and 2235 transitions. [2021-03-10 21:30:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:30:07,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:07,003 INFO L225 Difference]: With dead ends: 816 [2021-03-10 21:30:07,004 INFO L226 Difference]: Without dead ends: 783 [2021-03-10 21:30:07,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:30:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-03-10 21:30:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 619. [2021-03-10 21:30:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.9352750809061487) internal successors, (1814), 618 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1814 transitions. [2021-03-10 21:30:07,010 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1814 transitions. Word has length 19 [2021-03-10 21:30:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:07,010 INFO L480 AbstractCegarLoop]: Abstraction has 619 states and 1814 transitions. [2021-03-10 21:30:07,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1814 transitions. [2021-03-10 21:30:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:07,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:07,010 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:07,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2707,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:07,211 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:07,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1047154452, now seen corresponding path program 176 times [2021-03-10 21:30:07,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:07,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304816011] [2021-03-10 21:30:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:07,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304816011] [2021-03-10 21:30:07,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830973243] [2021-03-10 21:30:07,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:07,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:07,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:07,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:07,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:07,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:07,814 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:07,815 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:07,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:07,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:07,895 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:07,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:07,896 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:07,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:07,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:07,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354753182] [2021-03-10 21:30:07,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:07,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:07,924 INFO L87 Difference]: Start difference. First operand 619 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:08,365 INFO L93 Difference]: Finished difference Result 731 states and 2045 transitions. [2021-03-10 21:30:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:08,366 INFO L225 Difference]: With dead ends: 731 [2021-03-10 21:30:08,366 INFO L226 Difference]: Without dead ends: 721 [2021-03-10 21:30:08,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:30:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-03-10 21:30:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 621. [2021-03-10 21:30:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.935483870967742) internal successors, (1820), 620 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1820 transitions. [2021-03-10 21:30:08,372 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1820 transitions. Word has length 19 [2021-03-10 21:30:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:08,373 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1820 transitions. [2021-03-10 21:30:08,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1820 transitions. [2021-03-10 21:30:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:08,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:08,373 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:08,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2861 [2021-03-10 21:30:08,574 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -385947354, now seen corresponding path program 177 times [2021-03-10 21:30:08,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:08,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520774945] [2021-03-10 21:30:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:30:08,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520774945] [2021-03-10 21:30:08,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390352321] [2021-03-10 21:30:08,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:08,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:30:08,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:08,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:08,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:08,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:08,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:08,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:08,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:08,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:08,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:08,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:30:08,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732301685] [2021-03-10 21:30:08,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:08,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:09,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:09,000 INFO L87 Difference]: Start difference. First operand 621 states and 1820 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:09,239 INFO L93 Difference]: Finished difference Result 649 states and 1861 transitions. [2021-03-10 21:30:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:09,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:09,240 INFO L225 Difference]: With dead ends: 649 [2021-03-10 21:30:09,240 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 21:30:09,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:30:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 21:30:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 621. [2021-03-10 21:30:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.9338709677419357) internal successors, (1819), 620 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1819 transitions. [2021-03-10 21:30:09,246 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1819 transitions. Word has length 19 [2021-03-10 21:30:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:09,246 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1819 transitions. [2021-03-10 21:30:09,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1819 transitions. [2021-03-10 21:30:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:09,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:09,247 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:09,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:09,448 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash -434412732, now seen corresponding path program 178 times [2021-03-10 21:30:09,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:09,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711372187] [2021-03-10 21:30:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:09,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711372187] [2021-03-10 21:30:09,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453244694] [2021-03-10 21:30:09,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:09,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:09,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:09,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:09,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:09,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:09,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:10,027 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:10,027 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:10,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:10,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:10,180 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:10,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:10,180 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:10,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:10,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:10,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862612476] [2021-03-10 21:30:10,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:10,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:10,207 INFO L87 Difference]: Start difference. First operand 621 states and 1819 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:10,804 INFO L93 Difference]: Finished difference Result 789 states and 2195 transitions. [2021-03-10 21:30:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:10,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:10,805 INFO L225 Difference]: With dead ends: 789 [2021-03-10 21:30:10,805 INFO L226 Difference]: Without dead ends: 779 [2021-03-10 21:30:10,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 487.8ms TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:30:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-03-10 21:30:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 622. [2021-03-10 21:30:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.9355877616747184) internal successors, (1823), 621 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1823 transitions. [2021-03-10 21:30:10,812 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1823 transitions. Word has length 19 [2021-03-10 21:30:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:10,812 INFO L480 AbstractCegarLoop]: Abstraction has 622 states and 1823 transitions. [2021-03-10 21:30:10,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1823 transitions. [2021-03-10 21:30:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:10,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:10,812 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:11,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-03-10 21:30:11,027 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:11,027 INFO L82 PathProgramCache]: Analyzing trace with hash -704684536, now seen corresponding path program 179 times [2021-03-10 21:30:11,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:11,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972164735] [2021-03-10 21:30:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:11,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972164735] [2021-03-10 21:30:11,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328457642] [2021-03-10 21:30:11,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:11,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:11,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:11,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:11,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:11,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:11,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:11,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:11,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:11,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:11,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:11,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:11,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:11,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454249371] [2021-03-10 21:30:11,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:11,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:11,504 INFO L87 Difference]: Start difference. First operand 622 states and 1823 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:11,886 INFO L93 Difference]: Finished difference Result 716 states and 2072 transitions. [2021-03-10 21:30:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:30:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:11,887 INFO L225 Difference]: With dead ends: 716 [2021-03-10 21:30:11,887 INFO L226 Difference]: Without dead ends: 700 [2021-03-10 21:30:11,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-03-10 21:30:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 661. [2021-03-10 21:30:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.9681818181818183) internal successors, (1959), 660 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1959 transitions. [2021-03-10 21:30:11,894 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1959 transitions. Word has length 19 [2021-03-10 21:30:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:11,894 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1959 transitions. [2021-03-10 21:30:11,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1959 transitions. [2021-03-10 21:30:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:11,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:11,894 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:12,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3160 [2021-03-10 21:30:12,103 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash 154189994, now seen corresponding path program 180 times [2021-03-10 21:30:12,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:12,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314369158] [2021-03-10 21:30:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:12,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314369158] [2021-03-10 21:30:12,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625263553] [2021-03-10 21:30:12,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:12,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:30:12,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:12,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:12,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:12,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:12,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:12,677 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:12,678 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:12,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:12,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:12,762 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:12,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:12,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:12,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:12,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014083314] [2021-03-10 21:30:12,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:12,795 INFO L87 Difference]: Start difference. First operand 661 states and 1959 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:13,530 INFO L93 Difference]: Finished difference Result 807 states and 2279 transitions. [2021-03-10 21:30:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:30:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:13,531 INFO L225 Difference]: With dead ends: 807 [2021-03-10 21:30:13,531 INFO L226 Difference]: Without dead ends: 781 [2021-03-10 21:30:13,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 496.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:30:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-03-10 21:30:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 667. [2021-03-10 21:30:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.9684684684684686) internal successors, (1977), 666 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1977 transitions. [2021-03-10 21:30:13,538 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1977 transitions. Word has length 19 [2021-03-10 21:30:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:13,538 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1977 transitions. [2021-03-10 21:30:13,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1977 transitions. [2021-03-10 21:30:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:13,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:13,539 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:13,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:13,741 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1864803302, now seen corresponding path program 181 times [2021-03-10 21:30:13,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:13,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042798409] [2021-03-10 21:30:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:13,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042798409] [2021-03-10 21:30:13,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411126167] [2021-03-10 21:30:13,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:13,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:14,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:14,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:14,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:14,298 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:14,299 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:14,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:14,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:14,397 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:14,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:14,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:14,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:14,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:14,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627956370] [2021-03-10 21:30:14,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:14,426 INFO L87 Difference]: Start difference. First operand 667 states and 1977 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:14,842 INFO L93 Difference]: Finished difference Result 766 states and 2183 transitions. [2021-03-10 21:30:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:30:14,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:14,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:14,843 INFO L225 Difference]: With dead ends: 766 [2021-03-10 21:30:14,843 INFO L226 Difference]: Without dead ends: 756 [2021-03-10 21:30:14,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:30:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-03-10 21:30:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 675. [2021-03-10 21:30:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.970326409495549) internal successors, (2002), 674 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2002 transitions. [2021-03-10 21:30:14,849 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2002 transitions. Word has length 19 [2021-03-10 21:30:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:14,849 INFO L480 AbstractCegarLoop]: Abstraction has 675 states and 2002 transitions. [2021-03-10 21:30:14,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2002 transitions. [2021-03-10 21:30:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:14,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:14,850 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:15,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:15,050 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:15,051 INFO L82 PathProgramCache]: Analyzing trace with hash -940758998, now seen corresponding path program 182 times [2021-03-10 21:30:15,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:15,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610781190] [2021-03-10 21:30:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:15,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610781190] [2021-03-10 21:30:15,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561729301] [2021-03-10 21:30:15,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:15,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:15,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:15,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:15,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:15,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:15,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:15,607 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:15,608 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:15,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:15,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:15,692 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:15,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:15,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:15,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:15,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:15,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904738056] [2021-03-10 21:30:15,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:15,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:15,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:15,720 INFO L87 Difference]: Start difference. First operand 675 states and 2002 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:16,310 INFO L93 Difference]: Finished difference Result 837 states and 2353 transitions. [2021-03-10 21:30:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:30:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:16,312 INFO L225 Difference]: With dead ends: 837 [2021-03-10 21:30:16,312 INFO L226 Difference]: Without dead ends: 808 [2021-03-10 21:30:16,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:30:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-03-10 21:30:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 670. [2021-03-10 21:30:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.968609865470852) internal successors, (1986), 669 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1986 transitions. [2021-03-10 21:30:16,318 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1986 transitions. Word has length 19 [2021-03-10 21:30:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:16,318 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1986 transitions. [2021-03-10 21:30:16,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1986 transitions. [2021-03-10 21:30:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:16,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:16,319 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:16,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:16,519 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2013844378, now seen corresponding path program 183 times [2021-03-10 21:30:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:16,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75192495] [2021-03-10 21:30:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75192495] [2021-03-10 21:30:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128136646] [2021-03-10 21:30:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:16,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:30:16,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:16,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:16,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:16,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:16,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:17,111 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:17,111 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:17,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:17,188 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:17,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:17,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:17,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:17,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:17,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028634460] [2021-03-10 21:30:17,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:17,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:17,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:17,216 INFO L87 Difference]: Start difference. First operand 670 states and 1986 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:17,667 INFO L93 Difference]: Finished difference Result 781 states and 2228 transitions. [2021-03-10 21:30:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:17,668 INFO L225 Difference]: With dead ends: 781 [2021-03-10 21:30:17,668 INFO L226 Difference]: Without dead ends: 771 [2021-03-10 21:30:17,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:30:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-03-10 21:30:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 671. [2021-03-10 21:30:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.9686567164179105) internal successors, (1989), 670 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1989 transitions. [2021-03-10 21:30:17,675 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1989 transitions. Word has length 19 [2021-03-10 21:30:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:17,675 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1989 transitions. [2021-03-10 21:30:17,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1989 transitions. [2021-03-10 21:30:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:17,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:17,676 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:17,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-03-10 21:30:17,882 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:17,882 INFO L82 PathProgramCache]: Analyzing trace with hash -806481870, now seen corresponding path program 184 times [2021-03-10 21:30:17,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:17,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969871845] [2021-03-10 21:30:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:17,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969871845] [2021-03-10 21:30:17,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635676797] [2021-03-10 21:30:17,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:17,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:17,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:17,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:17,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:18,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:18,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:18,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:18,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:18,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:18,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:18,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:18,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:18,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607009861] [2021-03-10 21:30:18,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:18,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:18,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:18,362 INFO L87 Difference]: Start difference. First operand 671 states and 1989 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:18,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:18,688 INFO L93 Difference]: Finished difference Result 702 states and 2034 transitions. [2021-03-10 21:30:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:30:18,688 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:18,689 INFO L225 Difference]: With dead ends: 702 [2021-03-10 21:30:18,689 INFO L226 Difference]: Without dead ends: 680 [2021-03-10 21:30:18,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:30:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-03-10 21:30:18,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 671. [2021-03-10 21:30:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.967164179104478) internal successors, (1988), 670 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1988 transitions. [2021-03-10 21:30:18,695 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1988 transitions. Word has length 19 [2021-03-10 21:30:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:18,695 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1988 transitions. [2021-03-10 21:30:18,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1988 transitions. [2021-03-10 21:30:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:18,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:18,696 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:18,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3679,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:18,898 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash 153350736, now seen corresponding path program 185 times [2021-03-10 21:30:18,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:18,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140933005] [2021-03-10 21:30:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:18,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140933005] [2021-03-10 21:30:18,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479853465] [2021-03-10 21:30:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:18,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:30:18,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:18,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:19,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:19,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:19,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:19,423 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:19,423 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:19,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:19,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:19,539 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:19,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:19,540 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:19,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:19,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:19,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597915298] [2021-03-10 21:30:19,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:19,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:19,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:19,567 INFO L87 Difference]: Start difference. First operand 671 states and 1988 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:20,090 INFO L93 Difference]: Finished difference Result 827 states and 2298 transitions. [2021-03-10 21:30:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:30:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:20,092 INFO L225 Difference]: With dead ends: 827 [2021-03-10 21:30:20,092 INFO L226 Difference]: Without dead ends: 805 [2021-03-10 21:30:20,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:30:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-03-10 21:30:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 670. [2021-03-10 21:30:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.9626307922272046) internal successors, (1982), 669 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1982 transitions. [2021-03-10 21:30:20,098 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1982 transitions. Word has length 19 [2021-03-10 21:30:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:20,099 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1982 transitions. [2021-03-10 21:30:20,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1982 transitions. [2021-03-10 21:30:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:20,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:20,099 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:20,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3756 [2021-03-10 21:30:20,300 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1642755732, now seen corresponding path program 186 times [2021-03-10 21:30:20,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:20,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762930056] [2021-03-10 21:30:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:20,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762930056] [2021-03-10 21:30:20,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982202941] [2021-03-10 21:30:20,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:20,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:30:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:20,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:20,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:20,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:20,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:20,878 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:20,878 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:20,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:20,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:20,965 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:20,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:20,966 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:20,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:20,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:20,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474143119] [2021-03-10 21:30:20,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:20,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:20,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:20,994 INFO L87 Difference]: Start difference. First operand 670 states and 1982 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:21,657 INFO L93 Difference]: Finished difference Result 855 states and 2368 transitions. [2021-03-10 21:30:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:30:21,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:21,658 INFO L225 Difference]: With dead ends: 855 [2021-03-10 21:30:21,658 INFO L226 Difference]: Without dead ends: 826 [2021-03-10 21:30:21,659 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 587.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:30:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-03-10 21:30:21,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 662. [2021-03-10 21:30:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.9531013615733737) internal successors, (1952), 661 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1952 transitions. [2021-03-10 21:30:21,665 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1952 transitions. Word has length 19 [2021-03-10 21:30:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:21,665 INFO L480 AbstractCegarLoop]: Abstraction has 662 states and 1952 transitions. [2021-03-10 21:30:21,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1952 transitions. [2021-03-10 21:30:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:21,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:21,667 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:21,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:21,875 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash 569670352, now seen corresponding path program 187 times [2021-03-10 21:30:21,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:21,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050207921] [2021-03-10 21:30:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:21,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050207921] [2021-03-10 21:30:21,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280587928] [2021-03-10 21:30:21,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:21,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:22,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:22,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:22,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:22,497 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:22,498 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:22,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:22,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:22,568 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:22,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:22,568 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:22,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:22,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:22,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360823078] [2021-03-10 21:30:22,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:22,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:22,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:22,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:22,596 INFO L87 Difference]: Start difference. First operand 662 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:23,048 INFO L93 Difference]: Finished difference Result 809 states and 2278 transitions. [2021-03-10 21:30:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:23,048 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:23,049 INFO L225 Difference]: With dead ends: 809 [2021-03-10 21:30:23,049 INFO L226 Difference]: Without dead ends: 799 [2021-03-10 21:30:23,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:30:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-03-10 21:30:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 666. [2021-03-10 21:30:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.948872180451128) internal successors, (1961), 665 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1961 transitions. [2021-03-10 21:30:23,056 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1961 transitions. Word has length 19 [2021-03-10 21:30:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:23,056 INFO L480 AbstractCegarLoop]: Abstraction has 666 states and 1961 transitions. [2021-03-10 21:30:23,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1961 transitions. [2021-03-10 21:30:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:23,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:23,056 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:23,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:23,257 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -697786826, now seen corresponding path program 188 times [2021-03-10 21:30:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:23,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428904172] [2021-03-10 21:30:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428904172] [2021-03-10 21:30:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836250717] [2021-03-10 21:30:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:23,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:23,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:23,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:23,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:23,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:23,843 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:23,843 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:23,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:23,935 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:23,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:23,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:23,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:23,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:23,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206711038] [2021-03-10 21:30:23,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:23,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:23,974 INFO L87 Difference]: Start difference. First operand 666 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:24,660 INFO L93 Difference]: Finished difference Result 905 states and 2517 transitions. [2021-03-10 21:30:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:30:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:24,662 INFO L225 Difference]: With dead ends: 905 [2021-03-10 21:30:24,662 INFO L226 Difference]: Without dead ends: 895 [2021-03-10 21:30:24,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 620.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:30:24,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-03-10 21:30:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 667. [2021-03-10 21:30:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.951951951951952) internal successors, (1966), 666 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1966 transitions. [2021-03-10 21:30:24,669 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1966 transitions. Word has length 19 [2021-03-10 21:30:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:24,669 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1966 transitions. [2021-03-10 21:30:24,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1966 transitions. [2021-03-10 21:30:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:24,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:24,669 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:24,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-03-10 21:30:24,870 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2094507954, now seen corresponding path program 189 times [2021-03-10 21:30:24,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:24,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660301223] [2021-03-10 21:30:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660301223] [2021-03-10 21:30:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879486587] [2021-03-10 21:30:24,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:24,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:24,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:24,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:25,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:25,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:25,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:25,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:25,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:25,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:25,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:25,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985603552] [2021-03-10 21:30:25,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:25,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:25,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:25,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:25,310 INFO L87 Difference]: Start difference. First operand 667 states and 1966 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:25,589 INFO L93 Difference]: Finished difference Result 778 states and 2267 transitions. [2021-03-10 21:30:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:30:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:25,590 INFO L225 Difference]: With dead ends: 778 [2021-03-10 21:30:25,590 INFO L226 Difference]: Without dead ends: 760 [2021-03-10 21:30:25,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-03-10 21:30:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 721. [2021-03-10 21:30:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.9875) internal successors, (2151), 720 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2151 transitions. [2021-03-10 21:30:25,597 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2151 transitions. Word has length 19 [2021-03-10 21:30:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:25,597 INFO L480 AbstractCegarLoop]: Abstraction has 721 states and 2151 transitions. [2021-03-10 21:30:25,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2151 transitions. [2021-03-10 21:30:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:25,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:25,598 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:25,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4173,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:25,798 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:25,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1341584812, now seen corresponding path program 190 times [2021-03-10 21:30:25,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:25,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407268589] [2021-03-10 21:30:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:25,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407268589] [2021-03-10 21:30:25,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586641696] [2021-03-10 21:30:25,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:25,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:25,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:25,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:25,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:26,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:26,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:26,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:26,351 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:26,351 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:26,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:26,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:26,463 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:26,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:26,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:26,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:26,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:26,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478316315] [2021-03-10 21:30:26,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:26,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:26,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:26,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:26,495 INFO L87 Difference]: Start difference. First operand 721 states and 2151 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:27,355 INFO L93 Difference]: Finished difference Result 908 states and 2570 transitions. [2021-03-10 21:30:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:30:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:27,356 INFO L225 Difference]: With dead ends: 908 [2021-03-10 21:30:27,356 INFO L226 Difference]: Without dead ends: 875 [2021-03-10 21:30:27,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:30:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-03-10 21:30:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 729. [2021-03-10 21:30:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.993131868131868) internal successors, (2179), 728 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2179 transitions. [2021-03-10 21:30:27,363 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2179 transitions. Word has length 19 [2021-03-10 21:30:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:27,364 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2179 transitions. [2021-03-10 21:30:27,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2179 transitions. [2021-03-10 21:30:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:27,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:27,364 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:27,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-03-10 21:30:27,571 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash 369028496, now seen corresponding path program 191 times [2021-03-10 21:30:27,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:27,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912384857] [2021-03-10 21:30:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:27,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912384857] [2021-03-10 21:30:27,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097262453] [2021-03-10 21:30:27,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:27,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:27,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:27,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:27,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:28,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:28,164 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:28,164 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:28,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:28,260 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:28,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:28,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:28,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:28,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:28,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151459655] [2021-03-10 21:30:28,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:28,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:28,289 INFO L87 Difference]: Start difference. First operand 729 states and 2179 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:29,312 INFO L93 Difference]: Finished difference Result 1020 states and 2819 transitions. [2021-03-10 21:30:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:30:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:29,314 INFO L225 Difference]: With dead ends: 1020 [2021-03-10 21:30:29,314 INFO L226 Difference]: Without dead ends: 973 [2021-03-10 21:30:29,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 721.2ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:30:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-03-10 21:30:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 738. [2021-03-10 21:30:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.983717774762551) internal successors, (2199), 737 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2199 transitions. [2021-03-10 21:30:29,321 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2199 transitions. Word has length 19 [2021-03-10 21:30:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:29,321 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2199 transitions. [2021-03-10 21:30:29,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2199 transitions. [2021-03-10 21:30:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:29,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:29,322 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:29,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4333,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:29,522 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1858433492, now seen corresponding path program 192 times [2021-03-10 21:30:29,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:29,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718399940] [2021-03-10 21:30:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:29,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718399940] [2021-03-10 21:30:29,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378834917] [2021-03-10 21:30:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:29,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:30:29,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:29,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:29,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:29,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:30,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:30,177 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:30,177 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:30,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:30,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:30,296 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:30,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:30,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:30,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:30,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:30,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283083849] [2021-03-10 21:30:30,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:30,325 INFO L87 Difference]: Start difference. First operand 738 states and 2199 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:30,948 INFO L93 Difference]: Finished difference Result 871 states and 2475 transitions. [2021-03-10 21:30:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:30:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:30,949 INFO L225 Difference]: With dead ends: 871 [2021-03-10 21:30:30,949 INFO L226 Difference]: Without dead ends: 856 [2021-03-10 21:30:30,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 549.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:30:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-03-10 21:30:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 743. [2021-03-10 21:30:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.981132075471698) internal successors, (2212), 742 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2212 transitions. [2021-03-10 21:30:30,957 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2212 transitions. Word has length 19 [2021-03-10 21:30:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:30,957 INFO L480 AbstractCegarLoop]: Abstraction has 743 states and 2212 transitions. [2021-03-10 21:30:30,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2212 transitions. [2021-03-10 21:30:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:30,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:30,958 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:31,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4454,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:31,158 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash 785348112, now seen corresponding path program 193 times [2021-03-10 21:30:31,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:31,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541821872] [2021-03-10 21:30:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:31,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541821872] [2021-03-10 21:30:31,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006188059] [2021-03-10 21:30:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:31,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:31,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:31,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:31,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:31,758 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:31,759 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:31,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:31,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:31,991 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:31,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:31,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:32,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:32,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:32,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439167890] [2021-03-10 21:30:32,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:32,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:32,020 INFO L87 Difference]: Start difference. First operand 743 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:32,703 INFO L93 Difference]: Finished difference Result 917 states and 2588 transitions. [2021-03-10 21:30:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:30:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:32,704 INFO L225 Difference]: With dead ends: 917 [2021-03-10 21:30:32,704 INFO L226 Difference]: Without dead ends: 895 [2021-03-10 21:30:32,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:30:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-03-10 21:30:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 742. [2021-03-10 21:30:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-03-10 21:30:32,711 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-03-10 21:30:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:32,711 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-03-10 21:30:32,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-03-10 21:30:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:32,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:32,712 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:32,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4622,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:32,913 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1879439700, now seen corresponding path program 194 times [2021-03-10 21:30:32,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:32,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788155083] [2021-03-10 21:30:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788155083] [2021-03-10 21:30:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74215343] [2021-03-10 21:30:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:33,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:33,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:33,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:33,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:33,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:33,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:33,582 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:33,583 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:33,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:33,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:33,667 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:33,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:33,668 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:33,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:33,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080038348] [2021-03-10 21:30:33,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:33,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:33,697 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:34,317 INFO L93 Difference]: Finished difference Result 882 states and 2522 transitions. [2021-03-10 21:30:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:34,318 INFO L225 Difference]: With dead ends: 882 [2021-03-10 21:30:34,318 INFO L226 Difference]: Without dead ends: 872 [2021-03-10 21:30:34,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:30:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-03-10 21:30:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 742. [2021-03-10 21:30:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-03-10 21:30:34,326 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-03-10 21:30:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:34,326 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-03-10 21:30:34,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-03-10 21:30:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:34,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:34,327 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:34,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4782,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:34,527 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1973063432, now seen corresponding path program 195 times [2021-03-10 21:30:34,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:34,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370937950] [2021-03-10 21:30:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:34,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370937950] [2021-03-10 21:30:34,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393801628] [2021-03-10 21:30:34,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:34,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:34,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:34,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:34,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:34,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:34,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:34,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:34,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:34,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:34,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:34,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:34,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662595170] [2021-03-10 21:30:34,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:34,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:34,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:34,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:34,997 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:35,293 INFO L93 Difference]: Finished difference Result 781 states and 2273 transitions. [2021-03-10 21:30:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:30:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:35,294 INFO L225 Difference]: With dead ends: 781 [2021-03-10 21:30:35,294 INFO L226 Difference]: Without dead ends: 759 [2021-03-10 21:30:35,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:30:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-03-10 21:30:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 742. [2021-03-10 21:30:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.982456140350877) internal successors, (2210), 741 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2210 transitions. [2021-03-10 21:30:35,301 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2210 transitions. Word has length 19 [2021-03-10 21:30:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:35,301 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2210 transitions. [2021-03-10 21:30:35,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2210 transitions. [2021-03-10 21:30:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:35,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:35,302 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:35,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-03-10 21:30:35,511 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 343011498, now seen corresponding path program 196 times [2021-03-10 21:30:35,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:35,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759489623] [2021-03-10 21:30:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:35,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759489623] [2021-03-10 21:30:35,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569194663] [2021-03-10 21:30:35,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:35,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:35,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:35,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:35,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:35,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:35,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:36,088 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:36,088 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:36,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:36,207 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:36,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:36,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:36,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:36,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:36,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492950411] [2021-03-10 21:30:36,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:36,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:36,235 INFO L87 Difference]: Start difference. First operand 742 states and 2210 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:37,093 INFO L93 Difference]: Finished difference Result 986 states and 2710 transitions. [2021-03-10 21:30:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:30:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:37,094 INFO L225 Difference]: With dead ends: 986 [2021-03-10 21:30:37,094 INFO L226 Difference]: Without dead ends: 945 [2021-03-10 21:30:37,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 693.8ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:30:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-03-10 21:30:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 738. [2021-03-10 21:30:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.976933514246947) internal successors, (2194), 737 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2194 transitions. [2021-03-10 21:30:37,102 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2194 transitions. Word has length 19 [2021-03-10 21:30:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:37,102 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2194 transitions. [2021-03-10 21:30:37,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2194 transitions. [2021-03-10 21:30:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:37,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:37,103 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:37,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4951,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:37,303 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:37,303 INFO L82 PathProgramCache]: Analyzing trace with hash -730073882, now seen corresponding path program 197 times [2021-03-10 21:30:37,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:37,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754501378] [2021-03-10 21:30:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:37,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754501378] [2021-03-10 21:30:37,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786843657] [2021-03-10 21:30:37,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:37,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:37,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:37,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:37,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:37,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:37,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:37,976 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:37,977 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:37,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:38,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:38,146 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:38,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:38,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:38,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:38,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:38,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857338] [2021-03-10 21:30:38,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:38,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:38,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:38,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:38,176 INFO L87 Difference]: Start difference. First operand 738 states and 2194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:39,064 INFO L93 Difference]: Finished difference Result 978 states and 2744 transitions. [2021-03-10 21:30:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:30:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:39,066 INFO L225 Difference]: With dead ends: 978 [2021-03-10 21:30:39,066 INFO L226 Difference]: Without dead ends: 947 [2021-03-10 21:30:39,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 762.7ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:30:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-03-10 21:30:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 716. [2021-03-10 21:30:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.9762237762237764) internal successors, (2128), 715 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2128 transitions. [2021-03-10 21:30:39,073 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2128 transitions. Word has length 19 [2021-03-10 21:30:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:39,073 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 2128 transitions. [2021-03-10 21:30:39,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2128 transitions. [2021-03-10 21:30:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:39,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:39,074 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:39,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5087 [2021-03-10 21:30:39,279 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:39,279 INFO L82 PathProgramCache]: Analyzing trace with hash 364017706, now seen corresponding path program 198 times [2021-03-10 21:30:39,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:39,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583379652] [2021-03-10 21:30:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583379652] [2021-03-10 21:30:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500078918] [2021-03-10 21:30:39,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:39,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:30:39,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:39,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:39,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:39,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:39,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:39,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:39,866 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:39,866 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:39,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:39,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:39,944 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:39,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:39,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:39,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:39,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141688758] [2021-03-10 21:30:39,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:39,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:39,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:39,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:39,973 INFO L87 Difference]: Start difference. First operand 716 states and 2128 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:40,546 INFO L93 Difference]: Finished difference Result 934 states and 2662 transitions. [2021-03-10 21:30:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:40,548 INFO L225 Difference]: With dead ends: 934 [2021-03-10 21:30:40,548 INFO L226 Difference]: Without dead ends: 924 [2021-03-10 21:30:40,548 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:30:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-03-10 21:30:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 719. [2021-03-10 21:30:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9763231197771587) internal successors, (2137), 718 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2137 transitions. [2021-03-10 21:30:40,555 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2137 transitions. Word has length 19 [2021-03-10 21:30:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:40,555 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 2137 transitions. [2021-03-10 21:30:40,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2137 transitions. [2021-03-10 21:30:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:40,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:40,556 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:40,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5260,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:40,756 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:40,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1221778650, now seen corresponding path program 199 times [2021-03-10 21:30:40,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:40,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513543689] [2021-03-10 21:30:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:40,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513543689] [2021-03-10 21:30:40,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924326392] [2021-03-10 21:30:40,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:40,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:40,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:41,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:41,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:41,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:41,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:41,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:41,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:41,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326924330] [2021-03-10 21:30:41,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:41,214 INFO L87 Difference]: Start difference. First operand 719 states and 2137 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:41,549 INFO L93 Difference]: Finished difference Result 746 states and 2179 transitions. [2021-03-10 21:30:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:30:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:41,550 INFO L225 Difference]: With dead ends: 746 [2021-03-10 21:30:41,550 INFO L226 Difference]: Without dead ends: 728 [2021-03-10 21:30:41,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:30:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-03-10 21:30:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 719. [2021-03-10 21:30:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9749303621169916) internal successors, (2136), 718 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2136 transitions. [2021-03-10 21:30:41,557 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2136 transitions. Word has length 19 [2021-03-10 21:30:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:41,557 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 2136 transitions. [2021-03-10 21:30:41,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2136 transitions. [2021-03-10 21:30:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:41,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:41,558 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:41,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5328,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:41,758 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash -272449148, now seen corresponding path program 200 times [2021-03-10 21:30:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:41,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136658613] [2021-03-10 21:30:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136658613] [2021-03-10 21:30:41,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12460699] [2021-03-10 21:30:41,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:41,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:41,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:41,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:42,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:42,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:42,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:42,435 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:42,435 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:42,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:42,504 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:42,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:42,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:42,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:42,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:42,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681065367] [2021-03-10 21:30:42,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:42,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:42,534 INFO L87 Difference]: Start difference. First operand 719 states and 2136 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:43,348 INFO L93 Difference]: Finished difference Result 991 states and 2826 transitions. [2021-03-10 21:30:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:30:43,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:43,349 INFO L225 Difference]: With dead ends: 991 [2021-03-10 21:30:43,349 INFO L226 Difference]: Without dead ends: 981 [2021-03-10 21:30:43,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:30:43,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-03-10 21:30:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 730. [2021-03-10 21:30:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.9753086419753085) internal successors, (2169), 729 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2169 transitions. [2021-03-10 21:30:43,356 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2169 transitions. Word has length 19 [2021-03-10 21:30:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:43,356 INFO L480 AbstractCegarLoop]: Abstraction has 730 states and 2169 transitions. [2021-03-10 21:30:43,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2169 transitions. [2021-03-10 21:30:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:43,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:43,357 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:43,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5377,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:43,557 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1324838072, now seen corresponding path program 201 times [2021-03-10 21:30:43,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:43,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737016923] [2021-03-10 21:30:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737016923] [2021-03-10 21:30:43,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047111421] [2021-03-10 21:30:43,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:43,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:43,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:43,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:43,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:44,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:44,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:44,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:44,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:44,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:44,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:44,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019613939] [2021-03-10 21:30:44,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:44,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:44,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:44,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:44,050 INFO L87 Difference]: Start difference. First operand 730 states and 2169 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:44,400 INFO L93 Difference]: Finished difference Result 865 states and 2545 transitions. [2021-03-10 21:30:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:30:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:44,402 INFO L225 Difference]: With dead ends: 865 [2021-03-10 21:30:44,402 INFO L226 Difference]: Without dead ends: 849 [2021-03-10 21:30:44,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-03-10 21:30:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 821. [2021-03-10 21:30:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.0) internal successors, (2460), 820 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2460 transitions. [2021-03-10 21:30:44,409 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2460 transitions. Word has length 19 [2021-03-10 21:30:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:44,410 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2460 transitions. [2021-03-10 21:30:44,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2460 transitions. [2021-03-10 21:30:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:44,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:44,410 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:44,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5501,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:44,611 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash -465963542, now seen corresponding path program 202 times [2021-03-10 21:30:44,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:44,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178378732] [2021-03-10 21:30:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:44,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178378732] [2021-03-10 21:30:44,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675704449] [2021-03-10 21:30:44,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:44,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:44,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:44,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:44,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:45,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:45,207 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:45,207 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:45,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:45,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:45,291 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:45,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:45,291 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:45,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:45,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332988186] [2021-03-10 21:30:45,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:45,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:45,321 INFO L87 Difference]: Start difference. First operand 821 states and 2460 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:46,290 INFO L93 Difference]: Finished difference Result 986 states and 2831 transitions. [2021-03-10 21:30:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:30:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:46,292 INFO L225 Difference]: With dead ends: 986 [2021-03-10 21:30:46,292 INFO L226 Difference]: Without dead ends: 955 [2021-03-10 21:30:46,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 679.0ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:30:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-03-10 21:30:46,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 825. [2021-03-10 21:30:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.003640776699029) internal successors, (2475), 824 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2475 transitions. [2021-03-10 21:30:46,300 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2475 transitions. Word has length 19 [2021-03-10 21:30:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:46,301 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2475 transitions. [2021-03-10 21:30:46,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2475 transitions. [2021-03-10 21:30:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:46,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:46,301 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:46,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5576 [2021-03-10 21:30:46,502 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1244649766, now seen corresponding path program 203 times [2021-03-10 21:30:46,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:46,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399018464] [2021-03-10 21:30:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:46,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399018464] [2021-03-10 21:30:46,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461027674] [2021-03-10 21:30:46,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:46,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:46,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:46,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:46,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:46,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:46,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:47,079 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:47,080 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:47,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:47,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:47,194 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:47,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:47,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:47,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:30:47,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81186858] [2021-03-10 21:30:47,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:47,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:47,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:47,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:47,222 INFO L87 Difference]: Start difference. First operand 825 states and 2475 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:47,887 INFO L93 Difference]: Finished difference Result 1003 states and 2905 transitions. [2021-03-10 21:30:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:30:47,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:47,888 INFO L225 Difference]: With dead ends: 1003 [2021-03-10 21:30:47,888 INFO L226 Difference]: Without dead ends: 993 [2021-03-10 21:30:47,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:30:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-03-10 21:30:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 875. [2021-03-10 21:30:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.011441647597254) internal successors, (2632), 874 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2632 transitions. [2021-03-10 21:30:47,896 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2632 transitions. Word has length 19 [2021-03-10 21:30:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:47,896 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 2632 transitions. [2021-03-10 21:30:47,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2632 transitions. [2021-03-10 21:30:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:47,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:47,897 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:48,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5692,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:48,098 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:48,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1560912534, now seen corresponding path program 204 times [2021-03-10 21:30:48,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:48,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028878108] [2021-03-10 21:30:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028878108] [2021-03-10 21:30:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564085768] [2021-03-10 21:30:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:48,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:30:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:48,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:48,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:48,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:48,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:48,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:48,695 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:48,695 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:48,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:48,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:48,773 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:48,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:48,774 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:48,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:48,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28446317] [2021-03-10 21:30:48,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:48,802 INFO L87 Difference]: Start difference. First operand 875 states and 2632 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:49,720 INFO L93 Difference]: Finished difference Result 1134 states and 3184 transitions. [2021-03-10 21:30:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:30:49,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:49,722 INFO L225 Difference]: With dead ends: 1134 [2021-03-10 21:30:49,722 INFO L226 Difference]: Without dead ends: 1100 [2021-03-10 21:30:49,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 753.7ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:30:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-03-10 21:30:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 884. [2021-03-10 21:30:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.0067950169875424) internal successors, (2655), 883 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2655 transitions. [2021-03-10 21:30:49,731 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2655 transitions. Word has length 19 [2021-03-10 21:30:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:49,731 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2655 transitions. [2021-03-10 21:30:49,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2655 transitions. [2021-03-10 21:30:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:49,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:49,732 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:49,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5802 [2021-03-10 21:30:49,932 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1660969382, now seen corresponding path program 205 times [2021-03-10 21:30:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:49,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116765895] [2021-03-10 21:30:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:50,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116765895] [2021-03-10 21:30:50,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647629970] [2021-03-10 21:30:50,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:50,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:50,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:50,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:50,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:50,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:50,523 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:50,523 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:50,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:50,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:50,637 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:50,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:50,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:50,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:50,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696861588] [2021-03-10 21:30:50,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:50,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:50,666 INFO L87 Difference]: Start difference. First operand 884 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:51,421 INFO L93 Difference]: Finished difference Result 1000 states and 2894 transitions. [2021-03-10 21:30:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:30:51,422 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:51,423 INFO L225 Difference]: With dead ends: 1000 [2021-03-10 21:30:51,423 INFO L226 Difference]: Without dead ends: 985 [2021-03-10 21:30:51,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:30:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-03-10 21:30:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 889. [2021-03-10 21:30:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.0033783783783785) internal successors, (2667), 888 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2667 transitions. [2021-03-10 21:30:51,432 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2667 transitions. Word has length 19 [2021-03-10 21:30:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:51,432 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2667 transitions. [2021-03-10 21:30:51,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2667 transitions. [2021-03-10 21:30:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:51,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:51,433 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:51,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-03-10 21:30:51,648 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1539906326, now seen corresponding path program 206 times [2021-03-10 21:30:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:51,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509798537] [2021-03-10 21:30:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:51,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509798537] [2021-03-10 21:30:51,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830554833] [2021-03-10 21:30:51,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:51,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:51,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:51,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:51,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:52,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:52,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:52,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:52,265 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:52,265 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:52,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:52,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:52,361 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:52,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:52,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:52,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:52,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:52,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400076694] [2021-03-10 21:30:52,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:52,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:52,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:52,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:52,392 INFO L87 Difference]: Start difference. First operand 889 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:53,142 INFO L93 Difference]: Finished difference Result 1045 states and 2995 transitions. [2021-03-10 21:30:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:53,144 INFO L225 Difference]: With dead ends: 1045 [2021-03-10 21:30:53,144 INFO L226 Difference]: Without dead ends: 1030 [2021-03-10 21:30:53,144 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 769.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:30:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-03-10 21:30:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 889. [2021-03-10 21:30:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-03-10 21:30:53,153 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-03-10 21:30:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:53,153 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-03-10 21:30:53,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-03-10 21:30:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:53,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:53,154 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:53,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5995,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:53,354 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1982805466, now seen corresponding path program 207 times [2021-03-10 21:30:53,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:53,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631083960] [2021-03-10 21:30:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631083960] [2021-03-10 21:30:53,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460324422] [2021-03-10 21:30:53,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:53,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:53,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:53,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:53,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:53,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:53,990 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:53,991 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:53,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:54,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:54,149 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:54,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:54,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:54,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:54,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:54,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067700836] [2021-03-10 21:30:54,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:54,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:54,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:54,182 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:54,805 INFO L93 Difference]: Finished difference Result 997 states and 2917 transitions. [2021-03-10 21:30:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:54,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:54,807 INFO L225 Difference]: With dead ends: 997 [2021-03-10 21:30:54,807 INFO L226 Difference]: Without dead ends: 992 [2021-03-10 21:30:54,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:30:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-03-10 21:30:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 889. [2021-03-10 21:30:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-03-10 21:30:54,816 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-03-10 21:30:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:54,816 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-03-10 21:30:54,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-03-10 21:30:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:54,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:54,817 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:55,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6097 [2021-03-10 21:30:55,017 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2055345422, now seen corresponding path program 208 times [2021-03-10 21:30:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:55,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641949390] [2021-03-10 21:30:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:55,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641949390] [2021-03-10 21:30:55,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469362294] [2021-03-10 21:30:55,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:55,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:55,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:55,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:55,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:55,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:55,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:55,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:55,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:55,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:55,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:55,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90745468] [2021-03-10 21:30:55,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:55,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:55,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:55,545 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:56,022 INFO L93 Difference]: Finished difference Result 952 states and 2781 transitions. [2021-03-10 21:30:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:56,024 INFO L225 Difference]: With dead ends: 952 [2021-03-10 21:30:56,024 INFO L226 Difference]: Without dead ends: 924 [2021-03-10 21:30:56,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:30:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-03-10 21:30:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 889. [2021-03-10 21:30:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.001126126126126) internal successors, (2665), 888 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2665 transitions. [2021-03-10 21:30:56,032 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2665 transitions. Word has length 19 [2021-03-10 21:30:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:56,033 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2665 transitions. [2021-03-10 21:30:56,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2665 transitions. [2021-03-10 21:30:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:56,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:56,034 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:56,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:56,234 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:56,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:56,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1927527824, now seen corresponding path program 209 times [2021-03-10 21:30:56,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:56,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532235734] [2021-03-10 21:30:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:56,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532235734] [2021-03-10 21:30:56,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302560750] [2021-03-10 21:30:56,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:56,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:30:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:56,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:56,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:56,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:56,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:56,875 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:56,875 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:56,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:56,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:56,982 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:56,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:56,983 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:57,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:57,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:30:57,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184152313] [2021-03-10 21:30:57,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:30:57,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:30:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:57,013 INFO L87 Difference]: Start difference. First operand 889 states and 2665 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:58,019 INFO L93 Difference]: Finished difference Result 1134 states and 3182 transitions. [2021-03-10 21:30:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:30:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:58,021 INFO L225 Difference]: With dead ends: 1134 [2021-03-10 21:30:58,021 INFO L226 Difference]: Without dead ends: 1107 [2021-03-10 21:30:58,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:30:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-03-10 21:30:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 889. [2021-03-10 21:30:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9977477477477477) internal successors, (2662), 888 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2662 transitions. [2021-03-10 21:30:58,030 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2662 transitions. Word has length 19 [2021-03-10 21:30:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:58,030 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2662 transitions. [2021-03-10 21:30:58,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2662 transitions. [2021-03-10 21:30:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:58,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:58,031 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:58,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6269,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:58,231 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1273347884, now seen corresponding path program 210 times [2021-03-10 21:30:58,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:58,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960673622] [2021-03-10 21:30:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:58,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960673622] [2021-03-10 21:30:58,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550345703] [2021-03-10 21:30:58,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:58,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:30:58,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:58,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:30:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:58,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:30:58,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:58,828 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:58,829 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:58,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:30:58,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:59,008 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:59,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:59,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:30:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:59,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:59,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:30:59,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815661364] [2021-03-10 21:30:59,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:30:59,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:30:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:59,039 INFO L87 Difference]: Start difference. First operand 889 states and 2662 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:59,987 INFO L93 Difference]: Finished difference Result 1135 states and 3226 transitions. [2021-03-10 21:30:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:30:59,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:30:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:59,989 INFO L225 Difference]: With dead ends: 1135 [2021-03-10 21:30:59,989 INFO L226 Difference]: Without dead ends: 1106 [2021-03-10 21:30:59,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 910.9ms TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:30:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-03-10 21:30:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 867. [2021-03-10 21:30:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.9976905311778292) internal successors, (2596), 866 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2596 transitions. [2021-03-10 21:30:59,998 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2596 transitions. Word has length 19 [2021-03-10 21:30:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:59,998 INFO L480 AbstractCegarLoop]: Abstraction has 867 states and 2596 transitions. [2021-03-10 21:30:59,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2596 transitions. [2021-03-10 21:30:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:30:59,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:59,999 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:00,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:00,200 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1716247024, now seen corresponding path program 211 times [2021-03-10 21:31:00,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:00,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890452631] [2021-03-10 21:31:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:00,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890452631] [2021-03-10 21:31:00,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849599075] [2021-03-10 21:31:00,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:00,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:00,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:00,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:00,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:00,806 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:00,807 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:00,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:00,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:00,925 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:00,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:00,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:00,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:00,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:00,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083865992] [2021-03-10 21:31:00,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:00,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:00,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:00,954 INFO L87 Difference]: Start difference. First operand 867 states and 2596 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:01,800 INFO L93 Difference]: Finished difference Result 1062 states and 3058 transitions. [2021-03-10 21:31:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:31:01,801 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:01,802 INFO L225 Difference]: With dead ends: 1062 [2021-03-10 21:31:01,802 INFO L226 Difference]: Without dead ends: 1052 [2021-03-10 21:31:01,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 789.5ms TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:31:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-03-10 21:31:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 869. [2021-03-10 21:31:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9976958525345623) internal successors, (2602), 868 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2602 transitions. [2021-03-10 21:31:01,811 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2602 transitions. Word has length 19 [2021-03-10 21:31:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:01,811 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2602 transitions. [2021-03-10 21:31:01,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2602 transitions. [2021-03-10 21:31:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:01,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:01,812 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:02,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6495 [2021-03-10 21:31:02,012 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:02,012 INFO L82 PathProgramCache]: Analyzing trace with hash 789143798, now seen corresponding path program 212 times [2021-03-10 21:31:02,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:02,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618877633] [2021-03-10 21:31:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618877633] [2021-03-10 21:31:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803440524] [2021-03-10 21:31:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:02,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:02,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:02,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:02,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:02,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:02,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:02,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:02,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:02,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688581945] [2021-03-10 21:31:02,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:02,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:02,506 INFO L87 Difference]: Start difference. First operand 869 states and 2602 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:02,811 INFO L93 Difference]: Finished difference Result 915 states and 2683 transitions. [2021-03-10 21:31:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:02,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:02,813 INFO L225 Difference]: With dead ends: 915 [2021-03-10 21:31:02,813 INFO L226 Difference]: Without dead ends: 897 [2021-03-10 21:31:02,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-03-10 21:31:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 869. [2021-03-10 21:31:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9953917050691246) internal successors, (2600), 868 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2600 transitions. [2021-03-10 21:31:02,821 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2600 transitions. Word has length 19 [2021-03-10 21:31:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:02,821 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2600 transitions. [2021-03-10 21:31:02,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2600 transitions. [2021-03-10 21:31:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:02,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:02,822 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:03,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6607 [2021-03-10 21:31:03,023 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash 28116982, now seen corresponding path program 213 times [2021-03-10 21:31:03,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:03,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409913627] [2021-03-10 21:31:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:03,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409913627] [2021-03-10 21:31:03,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078872467] [2021-03-10 21:31:03,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:03,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:03,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:03,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:03,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:03,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:03,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:03,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:03,618 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:03,618 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:03,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:03,857 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:03,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:03,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:03,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:03,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:03,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402701193] [2021-03-10 21:31:03,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:03,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:03,888 INFO L87 Difference]: Start difference. First operand 869 states and 2600 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:04,905 INFO L93 Difference]: Finished difference Result 1107 states and 3182 transitions. [2021-03-10 21:31:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:31:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:04,906 INFO L225 Difference]: With dead ends: 1107 [2021-03-10 21:31:04,906 INFO L226 Difference]: Without dead ends: 1097 [2021-03-10 21:31:04,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 929.9ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:31:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-03-10 21:31:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 896. [2021-03-10 21:31:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.9966480446927375) internal successors, (2682), 895 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2682 transitions. [2021-03-10 21:31:04,915 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2682 transitions. Word has length 19 [2021-03-10 21:31:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:04,916 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2682 transitions. [2021-03-10 21:31:04,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2682 transitions. [2021-03-10 21:31:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:04,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:04,916 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:05,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6671,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:05,117 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash 49617522, now seen corresponding path program 214 times [2021-03-10 21:31:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:05,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088878488] [2021-03-10 21:31:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:05,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088878488] [2021-03-10 21:31:05,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012568435] [2021-03-10 21:31:05,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:05,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:05,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:05,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:05,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:05,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:05,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:05,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:05,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:05,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:05,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:05,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:05,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141396614] [2021-03-10 21:31:05,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:05,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:05,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:05,559 INFO L87 Difference]: Start difference. First operand 896 states and 2682 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:05,907 INFO L93 Difference]: Finished difference Result 1009 states and 2994 transitions. [2021-03-10 21:31:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:05,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:05,909 INFO L225 Difference]: With dead ends: 1009 [2021-03-10 21:31:05,909 INFO L226 Difference]: Without dead ends: 995 [2021-03-10 21:31:05,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-03-10 21:31:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 972. [2021-03-10 21:31:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.015447991761071) internal successors, (2928), 971 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 2928 transitions. [2021-03-10 21:31:05,918 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 2928 transitions. Word has length 19 [2021-03-10 21:31:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:05,918 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 2928 transitions. [2021-03-10 21:31:05,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 2928 transitions. [2021-03-10 21:31:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:05,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:05,919 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:06,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6841 [2021-03-10 21:31:06,134 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash 908492052, now seen corresponding path program 215 times [2021-03-10 21:31:06,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:06,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41506632] [2021-03-10 21:31:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:06,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41506632] [2021-03-10 21:31:06,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101607871] [2021-03-10 21:31:06,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:06,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:31:06,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:06,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:06,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:06,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:06,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:06,708 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:06,708 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:06,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:06,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:06,837 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:06,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:06,838 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:06,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:06,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:06,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730171593] [2021-03-10 21:31:06,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:06,868 INFO L87 Difference]: Start difference. First operand 972 states and 2928 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:07,817 INFO L93 Difference]: Finished difference Result 1109 states and 3246 transitions. [2021-03-10 21:31:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:31:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:07,819 INFO L225 Difference]: With dead ends: 1109 [2021-03-10 21:31:07,819 INFO L226 Difference]: Without dead ends: 1099 [2021-03-10 21:31:07,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 726.6ms TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:31:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-03-10 21:31:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 976. [2021-03-10 21:31:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.0194871794871796) internal successors, (2944), 975 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2944 transitions. [2021-03-10 21:31:07,830 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2944 transitions. Word has length 19 [2021-03-10 21:31:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:07,830 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 2944 transitions. [2021-03-10 21:31:07,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2944 transitions. [2021-03-10 21:31:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:07,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:07,831 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:08,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6892 [2021-03-10 21:31:08,045 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1675861936, now seen corresponding path program 216 times [2021-03-10 21:31:08,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:08,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804045421] [2021-03-10 21:31:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:08,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804045421] [2021-03-10 21:31:08,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744026952] [2021-03-10 21:31:08,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:08,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:08,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:08,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:08,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:08,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:08,609 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:08,610 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:08,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:08,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:08,696 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:08,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:08,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:08,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:08,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:08,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633889751] [2021-03-10 21:31:08,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:08,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:08,725 INFO L87 Difference]: Start difference. First operand 976 states and 2944 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:09,606 INFO L93 Difference]: Finished difference Result 1144 states and 3334 transitions. [2021-03-10 21:31:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:31:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:09,607 INFO L225 Difference]: With dead ends: 1144 [2021-03-10 21:31:09,607 INFO L226 Difference]: Without dead ends: 1134 [2021-03-10 21:31:09,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:31:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-03-10 21:31:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1010. [2021-03-10 21:31:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.0297324083250743) internal successors, (3057), 1009 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3057 transitions. [2021-03-10 21:31:09,617 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3057 transitions. Word has length 19 [2021-03-10 21:31:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:09,617 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 3057 transitions. [2021-03-10 21:31:09,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3057 transitions. [2021-03-10 21:31:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:09,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:09,618 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:09,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7020,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:09,819 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash -186456940, now seen corresponding path program 217 times [2021-03-10 21:31:09,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:09,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500556917] [2021-03-10 21:31:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:09,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500556917] [2021-03-10 21:31:09,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579184498] [2021-03-10 21:31:09,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:09,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:10,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:10,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:10,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:10,415 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:10,415 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:10,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:10,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:10,527 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:10,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:10,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:10,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:10,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:10,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940592644] [2021-03-10 21:31:10,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:10,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:10,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:10,557 INFO L87 Difference]: Start difference. First operand 1010 states and 3057 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:11,463 INFO L93 Difference]: Finished difference Result 1206 states and 3490 transitions. [2021-03-10 21:31:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:31:11,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:11,465 INFO L225 Difference]: With dead ends: 1206 [2021-03-10 21:31:11,465 INFO L226 Difference]: Without dead ends: 1191 [2021-03-10 21:31:11,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 699.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:31:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-03-10 21:31:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1047. [2021-03-10 21:31:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.0315487571701722) internal successors, (3171), 1046 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3171 transitions. [2021-03-10 21:31:11,475 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3171 transitions. Word has length 19 [2021-03-10 21:31:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:11,475 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3171 transitions. [2021-03-10 21:31:11,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3171 transitions. [2021-03-10 21:31:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:11,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:11,476 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:11,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7116,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:11,677 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1259542320, now seen corresponding path program 218 times [2021-03-10 21:31:11,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:11,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428731095] [2021-03-10 21:31:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:11,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428731095] [2021-03-10 21:31:11,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869700190] [2021-03-10 21:31:11,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:11,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:11,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:11,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:12,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:12,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:12,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:12,268 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:12,268 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:12,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:12,383 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:12,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:12,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:12,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:12,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:12,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508456987] [2021-03-10 21:31:12,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:12,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:12,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:12,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:12,412 INFO L87 Difference]: Start difference. First operand 1047 states and 3171 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:13,551 INFO L93 Difference]: Finished difference Result 1314 states and 3702 transitions. [2021-03-10 21:31:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:31:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:13,553 INFO L225 Difference]: With dead ends: 1314 [2021-03-10 21:31:13,553 INFO L226 Difference]: Without dead ends: 1289 [2021-03-10 21:31:13,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 987.9ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:31:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-03-10 21:31:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1050. [2021-03-10 21:31:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.0276453765490943) internal successors, (3176), 1049 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3176 transitions. [2021-03-10 21:31:13,563 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3176 transitions. Word has length 19 [2021-03-10 21:31:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:13,563 INFO L480 AbstractCegarLoop]: Abstraction has 1050 states and 3176 transitions. [2021-03-10 21:31:13,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3176 transitions. [2021-03-10 21:31:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:13,564 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:13,564 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:13,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7236 [2021-03-10 21:31:13,765 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash -165450732, now seen corresponding path program 219 times [2021-03-10 21:31:13,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:13,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762403888] [2021-03-10 21:31:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:13,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762403888] [2021-03-10 21:31:13,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573520250] [2021-03-10 21:31:13,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:31:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:13,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:13,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:14,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:14,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:14,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:14,340 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:14,340 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:14,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:14,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:14,521 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:14,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:14,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:14,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:14,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:14,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963462982] [2021-03-10 21:31:14,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:14,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:14,552 INFO L87 Difference]: Start difference. First operand 1050 states and 3176 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:15,380 INFO L93 Difference]: Finished difference Result 1208 states and 3517 transitions. [2021-03-10 21:31:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:31:15,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:15,381 INFO L225 Difference]: With dead ends: 1208 [2021-03-10 21:31:15,381 INFO L226 Difference]: Without dead ends: 1193 [2021-03-10 21:31:15,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:31:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-03-10 21:31:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1057. [2021-03-10 21:31:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.024621212121212) internal successors, (3194), 1056 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 3194 transitions. [2021-03-10 21:31:15,391 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 3194 transitions. Word has length 19 [2021-03-10 21:31:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:15,391 INFO L480 AbstractCegarLoop]: Abstraction has 1057 states and 3194 transitions. [2021-03-10 21:31:15,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 3194 transitions. [2021-03-10 21:31:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:15,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:15,392 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:15,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7342 [2021-03-10 21:31:15,593 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash -608349872, now seen corresponding path program 220 times [2021-03-10 21:31:15,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:15,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936930093] [2021-03-10 21:31:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936930093] [2021-03-10 21:31:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665005192] [2021-03-10 21:31:15,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:15,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:15,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:15,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:15,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:15,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:15,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:16,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:16,348 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:16,349 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:16,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:16,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:16,590 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:16,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:16,591 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:16,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:16,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:16,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047938495] [2021-03-10 21:31:16,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:16,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:16,620 INFO L87 Difference]: Start difference. First operand 1057 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:17,510 INFO L93 Difference]: Finished difference Result 1268 states and 3657 transitions. [2021-03-10 21:31:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:17,512 INFO L225 Difference]: With dead ends: 1268 [2021-03-10 21:31:17,512 INFO L226 Difference]: Without dead ends: 1253 [2021-03-10 21:31:17,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 894.5ms TimeCoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:31:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-03-10 21:31:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1056. [2021-03-10 21:31:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.0274881516587677) internal successors, (3194), 1055 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3194 transitions. [2021-03-10 21:31:17,522 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3194 transitions. Word has length 19 [2021-03-10 21:31:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:17,522 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 3194 transitions. [2021-03-10 21:31:17,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3194 transitions. [2021-03-10 21:31:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:17,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:17,523 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:17,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7465 [2021-03-10 21:31:17,724 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1453321324, now seen corresponding path program 221 times [2021-03-10 21:31:17,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:17,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136343372] [2021-03-10 21:31:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:17,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136343372] [2021-03-10 21:31:17,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14634899] [2021-03-10 21:31:17,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:17,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:17,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:17,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:31:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:18,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:18,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:18,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:18,330 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:18,330 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:18,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-03-10 21:31:18,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:18,453 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:18,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:18,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-03-10 21:31:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:18,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:18,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:18,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379118017] [2021-03-10 21:31:18,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:18,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:18,484 INFO L87 Difference]: Start difference. First operand 1056 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:19,228 INFO L93 Difference]: Finished difference Result 1209 states and 3557 transitions. [2021-03-10 21:31:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:31:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:19,230 INFO L225 Difference]: With dead ends: 1209 [2021-03-10 21:31:19,230 INFO L226 Difference]: Without dead ends: 1204 [2021-03-10 21:31:19,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:31:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-03-10 21:31:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1058. [2021-03-10 21:31:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.024597918637654) internal successors, (3197), 1057 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3197 transitions. [2021-03-10 21:31:19,240 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3197 transitions. Word has length 19 [2021-03-10 21:31:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:19,241 INFO L480 AbstractCegarLoop]: Abstraction has 1058 states and 3197 transitions. [2021-03-10 21:31:19,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3197 transitions. [2021-03-10 21:31:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:19,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:19,242 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:19,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7737 [2021-03-10 21:31:19,442 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2016450674, now seen corresponding path program 222 times [2021-03-10 21:31:19,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:19,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435801986] [2021-03-10 21:31:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:19,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435801986] [2021-03-10 21:31:19,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113449692] [2021-03-10 21:31:19,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:19,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:31:19,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:19,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:19,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:20,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:20,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:20,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:20,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:20,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:20,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:20,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758674964] [2021-03-10 21:31:20,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:20,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:20,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:20,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:20,146 INFO L87 Difference]: Start difference. First operand 1058 states and 3197 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:20,624 INFO L93 Difference]: Finished difference Result 1126 states and 3328 transitions. [2021-03-10 21:31:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:20,626 INFO L225 Difference]: With dead ends: 1126 [2021-03-10 21:31:20,626 INFO L226 Difference]: Without dead ends: 1113 [2021-03-10 21:31:20,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:31:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-03-10 21:31:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1063. [2021-03-10 21:31:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.019774011299435) internal successors, (3207), 1062 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3207 transitions. [2021-03-10 21:31:20,636 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3207 transitions. Word has length 20 [2021-03-10 21:31:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:20,636 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 3207 transitions. [2021-03-10 21:31:20,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3207 transitions. [2021-03-10 21:31:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:20,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:20,637 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:20,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7852 [2021-03-10 21:31:20,837 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2008627890, now seen corresponding path program 223 times [2021-03-10 21:31:20,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:20,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996588836] [2021-03-10 21:31:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996588836] [2021-03-10 21:31:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934750404] [2021-03-10 21:31:20,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:20,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:20,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:21,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:21,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:21,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:21,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:21,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:21,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:21,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:21,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:21,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993845900] [2021-03-10 21:31:21,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:21,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:21,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:21,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:21,394 INFO L87 Difference]: Start difference. First operand 1063 states and 3207 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:21,903 INFO L93 Difference]: Finished difference Result 1193 states and 3423 transitions. [2021-03-10 21:31:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:21,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:21,905 INFO L225 Difference]: With dead ends: 1193 [2021-03-10 21:31:21,905 INFO L226 Difference]: Without dead ends: 1184 [2021-03-10 21:31:21,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-03-10 21:31:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1065. [2021-03-10 21:31:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-03-10 21:31:21,915 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-03-10 21:31:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-03-10 21:31:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-03-10 21:31:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:21,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:21,916 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:22,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7966,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:22,117 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash 560859948, now seen corresponding path program 224 times [2021-03-10 21:31:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:22,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040235533] [2021-03-10 21:31:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:22,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040235533] [2021-03-10 21:31:22,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225335706] [2021-03-10 21:31:22,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:22,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:22,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:22,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:22,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:22,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:23,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:23,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:23,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:23,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:23,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:23,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:23,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492488192] [2021-03-10 21:31:23,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:23,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:23,073 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:23,541 INFO L93 Difference]: Finished difference Result 1199 states and 3459 transitions. [2021-03-10 21:31:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:31:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:23,542 INFO L225 Difference]: With dead ends: 1199 [2021-03-10 21:31:23,542 INFO L226 Difference]: Without dead ends: 1194 [2021-03-10 21:31:23,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-03-10 21:31:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1065. [2021-03-10 21:31:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-03-10 21:31:23,553 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-03-10 21:31:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:23,553 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-03-10 21:31:23,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-03-10 21:31:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:23,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:23,554 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:23,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8051 [2021-03-10 21:31:23,754 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1075164181, now seen corresponding path program 225 times [2021-03-10 21:31:23,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:23,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051785030] [2021-03-10 21:31:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:23,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051785030] [2021-03-10 21:31:23,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134491112] [2021-03-10 21:31:23,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:23,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:23,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:31:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:23,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:23,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:31:23,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565366687] [2021-03-10 21:31:23,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:23,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:23,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:23,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:23,851 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:23,904 INFO L93 Difference]: Finished difference Result 1365 states and 3760 transitions. [2021-03-10 21:31:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:31:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:23,906 INFO L225 Difference]: With dead ends: 1365 [2021-03-10 21:31:23,906 INFO L226 Difference]: Without dead ends: 1365 [2021-03-10 21:31:23,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-03-10 21:31:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1073. [2021-03-10 21:31:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0261194029850746) internal successors, (3244), 1072 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3244 transitions. [2021-03-10 21:31:23,916 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3244 transitions. Word has length 20 [2021-03-10 21:31:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:23,916 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3244 transitions. [2021-03-10 21:31:23,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3244 transitions. [2021-03-10 21:31:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:23,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:23,917 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:24,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8326,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:24,118 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 421097848, now seen corresponding path program 226 times [2021-03-10 21:31:24,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:24,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063689457] [2021-03-10 21:31:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:24,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063689457] [2021-03-10 21:31:24,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672403539] [2021-03-10 21:31:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:24,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:24,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:24,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:24,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:24,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:24,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:24,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:24,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:24,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:24,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:24,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308565395] [2021-03-10 21:31:24,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:24,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:24,694 INFO L87 Difference]: Start difference. First operand 1073 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:25,072 INFO L93 Difference]: Finished difference Result 1199 states and 3479 transitions. [2021-03-10 21:31:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:25,074 INFO L225 Difference]: With dead ends: 1199 [2021-03-10 21:31:25,074 INFO L226 Difference]: Without dead ends: 1194 [2021-03-10 21:31:25,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-03-10 21:31:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1079. [2021-03-10 21:31:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.031539888682746) internal successors, (3268), 1078 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3268 transitions. [2021-03-10 21:31:25,084 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3268 transitions. Word has length 20 [2021-03-10 21:31:25,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:25,084 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3268 transitions. [2021-03-10 21:31:25,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3268 transitions. [2021-03-10 21:31:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:25,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:25,085 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:25,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8327 [2021-03-10 21:31:25,286 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:25,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1304381610, now seen corresponding path program 227 times [2021-03-10 21:31:25,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:25,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750621727] [2021-03-10 21:31:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:25,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750621727] [2021-03-10 21:31:25,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020912679] [2021-03-10 21:31:25,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:25,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:31:25,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:25,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:25,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:25,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:25,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:25,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:25,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:25,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:25,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:25,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635230708] [2021-03-10 21:31:25,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:25,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:25,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:25,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:25,887 INFO L87 Difference]: Start difference. First operand 1079 states and 3268 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:26,312 INFO L93 Difference]: Finished difference Result 1210 states and 3510 transitions. [2021-03-10 21:31:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:31:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:26,313 INFO L225 Difference]: With dead ends: 1210 [2021-03-10 21:31:26,313 INFO L226 Difference]: Without dead ends: 1201 [2021-03-10 21:31:26,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-03-10 21:31:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1081. [2021-03-10 21:31:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.0296296296296297) internal successors, (3272), 1080 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3272 transitions. [2021-03-10 21:31:26,324 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3272 transitions. Word has length 20 [2021-03-10 21:31:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:26,324 INFO L480 AbstractCegarLoop]: Abstraction has 1081 states and 3272 transitions. [2021-03-10 21:31:26,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3272 transitions. [2021-03-10 21:31:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:26,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:26,325 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:26,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8415,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:26,526 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 185023386, now seen corresponding path program 228 times [2021-03-10 21:31:26,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:26,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140766236] [2021-03-10 21:31:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:26,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140766236] [2021-03-10 21:31:26,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240174391] [2021-03-10 21:31:26,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:26,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:31:26,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:26,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:26,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:27,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:27,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:27,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:27,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:27,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789384311] [2021-03-10 21:31:27,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:27,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:27,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:27,202 INFO L87 Difference]: Start difference. First operand 1081 states and 3272 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:27,504 INFO L93 Difference]: Finished difference Result 1169 states and 3442 transitions. [2021-03-10 21:31:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:27,505 INFO L225 Difference]: With dead ends: 1169 [2021-03-10 21:31:27,506 INFO L226 Difference]: Without dead ends: 1164 [2021-03-10 21:31:27,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-03-10 21:31:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1082. [2021-03-10 21:31:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 3.0296022201665127) internal successors, (3275), 1081 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3275 transitions. [2021-03-10 21:31:27,515 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3275 transitions. Word has length 20 [2021-03-10 21:31:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:27,515 INFO L480 AbstractCegarLoop]: Abstraction has 1082 states and 3275 transitions. [2021-03-10 21:31:27,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3275 transitions. [2021-03-10 21:31:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:27,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:27,516 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:27,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8519 [2021-03-10 21:31:27,717 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash -706298245, now seen corresponding path program 229 times [2021-03-10 21:31:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:27,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859744428] [2021-03-10 21:31:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859744428] [2021-03-10 21:31:27,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809579133] [2021-03-10 21:31:27,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:31:27,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:27,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:31:27,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783421161] [2021-03-10 21:31:27,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:31:27,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:31:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:27,821 INFO L87 Difference]: Start difference. First operand 1082 states and 3275 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:27,910 INFO L93 Difference]: Finished difference Result 1465 states and 4016 transitions. [2021-03-10 21:31:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:31:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:27,912 INFO L225 Difference]: With dead ends: 1465 [2021-03-10 21:31:27,912 INFO L226 Difference]: Without dead ends: 1465 [2021-03-10 21:31:27,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:31:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-03-10 21:31:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1072. [2021-03-10 21:31:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.022408963585434) internal successors, (3237), 1071 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3237 transitions. [2021-03-10 21:31:27,924 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3237 transitions. Word has length 20 [2021-03-10 21:31:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:27,924 INFO L480 AbstractCegarLoop]: Abstraction has 1072 states and 3237 transitions. [2021-03-10 21:31:27,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3237 transitions. [2021-03-10 21:31:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:27,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:27,925 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:28,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8647,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:28,127 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1248078420, now seen corresponding path program 230 times [2021-03-10 21:31:28,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:28,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843072279] [2021-03-10 21:31:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:31:28,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843072279] [2021-03-10 21:31:28,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889727477] [2021-03-10 21:31:28,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:28,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:28,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:28,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:28,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:28,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:28,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:28,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:28,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:31:28,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722182879] [2021-03-10 21:31:28,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:31:28,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:28,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:31:28,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:28,665 INFO L87 Difference]: Start difference. First operand 1072 states and 3237 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:28,949 INFO L93 Difference]: Finished difference Result 1095 states and 3276 transitions. [2021-03-10 21:31:28,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:31:28,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:28,951 INFO L225 Difference]: With dead ends: 1095 [2021-03-10 21:31:28,951 INFO L226 Difference]: Without dead ends: 1080 [2021-03-10 21:31:28,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-03-10 21:31:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1069. [2021-03-10 21:31:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.019662921348315) internal successors, (3225), 1068 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3225 transitions. [2021-03-10 21:31:28,960 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3225 transitions. Word has length 20 [2021-03-10 21:31:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:28,960 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 3225 transitions. [2021-03-10 21:31:28,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3225 transitions. [2021-03-10 21:31:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:28,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:28,961 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:29,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8648,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:29,162 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1296543798, now seen corresponding path program 231 times [2021-03-10 21:31:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:29,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79595902] [2021-03-10 21:31:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:29,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79595902] [2021-03-10 21:31:29,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982698271] [2021-03-10 21:31:29,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:29,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:31:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:29,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:29,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:29,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:30,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:30,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:30,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:30,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:30,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:30,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129087765] [2021-03-10 21:31:30,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:30,114 INFO L87 Difference]: Start difference. First operand 1069 states and 3225 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:30,533 INFO L93 Difference]: Finished difference Result 1190 states and 3432 transitions. [2021-03-10 21:31:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:31:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:30,535 INFO L225 Difference]: With dead ends: 1190 [2021-03-10 21:31:30,535 INFO L226 Difference]: Without dead ends: 1167 [2021-03-10 21:31:30,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-03-10 21:31:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1068. [2021-03-10 21:31:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.0159325210871604) internal successors, (3218), 1067 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3218 transitions. [2021-03-10 21:31:30,545 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3218 transitions. Word has length 20 [2021-03-10 21:31:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:30,545 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 3218 transitions. [2021-03-10 21:31:30,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3218 transitions. [2021-03-10 21:31:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:30,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:30,546 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:30,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8724,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:30,747 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1566815602, now seen corresponding path program 232 times [2021-03-10 21:31:30,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:30,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415987184] [2021-03-10 21:31:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:30,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415987184] [2021-03-10 21:31:30,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265341444] [2021-03-10 21:31:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:30,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:30,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:31,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:31,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:31,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:31,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:31,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:31,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:31,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:31,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:31,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694680310] [2021-03-10 21:31:31,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:31,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:31,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:31,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:31,356 INFO L87 Difference]: Start difference. First operand 1068 states and 3218 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:31,736 INFO L93 Difference]: Finished difference Result 1170 states and 3412 transitions. [2021-03-10 21:31:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:31,738 INFO L225 Difference]: With dead ends: 1170 [2021-03-10 21:31:31,738 INFO L226 Difference]: Without dead ends: 1161 [2021-03-10 21:31:31,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-03-10 21:31:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1073. [2021-03-10 21:31:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-03-10 21:31:31,748 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-03-10 21:31:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:31,748 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-03-10 21:31:31,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-03-10 21:31:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:31,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:31,749 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:31,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9021,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:31,950 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1002672236, now seen corresponding path program 233 times [2021-03-10 21:31:31,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:31,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562270631] [2021-03-10 21:31:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:32,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562270631] [2021-03-10 21:31:32,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829100411] [2021-03-10 21:31:32,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:32,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:31:32,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:32,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:32,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:32,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:32,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:32,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:32,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:32,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:32,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:32,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:32,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:32,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163796160] [2021-03-10 21:31:32,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:32,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:32,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:32,559 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:33,004 INFO L93 Difference]: Finished difference Result 1158 states and 3390 transitions. [2021-03-10 21:31:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:33,006 INFO L225 Difference]: With dead ends: 1158 [2021-03-10 21:31:33,006 INFO L226 Difference]: Without dead ends: 1153 [2021-03-10 21:31:33,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-03-10 21:31:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1073. [2021-03-10 21:31:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-03-10 21:31:33,016 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-03-10 21:31:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:33,017 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-03-10 21:31:33,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-03-10 21:31:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:33,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:33,018 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:33,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9134,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:33,218 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1802890064, now seen corresponding path program 234 times [2021-03-10 21:31:33,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:33,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678609070] [2021-03-10 21:31:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678609070] [2021-03-10 21:31:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724420471] [2021-03-10 21:31:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:33,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:31:33,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:33,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:33,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:33,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:33,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:33,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:33,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:33,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:33,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:33,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666213848] [2021-03-10 21:31:33,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:33,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:33,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:33,961 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:34,616 INFO L93 Difference]: Finished difference Result 1194 states and 3443 transitions. [2021-03-10 21:31:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:31:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:34,617 INFO L225 Difference]: With dead ends: 1194 [2021-03-10 21:31:34,617 INFO L226 Difference]: Without dead ends: 1177 [2021-03-10 21:31:34,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:31:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-03-10 21:31:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1073. [2021-03-10 21:31:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0065298507462686) internal successors, (3223), 1072 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3223 transitions. [2021-03-10 21:31:34,627 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3223 transitions. Word has length 20 [2021-03-10 21:31:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:34,627 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3223 transitions. [2021-03-10 21:31:34,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3223 transitions. [2021-03-10 21:31:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:34,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:34,628 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:34,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9229,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:34,829 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1600755601, now seen corresponding path program 235 times [2021-03-10 21:31:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:34,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888206042] [2021-03-10 21:31:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:34,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888206042] [2021-03-10 21:31:34,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419857129] [2021-03-10 21:31:34,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:34,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:31:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:34,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:34,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:31:34,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666836471] [2021-03-10 21:31:34,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:31:34,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:31:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:34,928 INFO L87 Difference]: Start difference. First operand 1073 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:35,007 INFO L93 Difference]: Finished difference Result 1408 states and 3883 transitions. [2021-03-10 21:31:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:31:35,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:35,008 INFO L225 Difference]: With dead ends: 1408 [2021-03-10 21:31:35,008 INFO L226 Difference]: Without dead ends: 1408 [2021-03-10 21:31:35,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:31:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-03-10 21:31:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1089. [2021-03-10 21:31:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 3.011029411764706) internal successors, (3276), 1088 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3276 transitions. [2021-03-10 21:31:35,020 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3276 transitions. Word has length 20 [2021-03-10 21:31:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:35,020 INFO L480 AbstractCegarLoop]: Abstraction has 1089 states and 3276 transitions. [2021-03-10 21:31:35,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3276 transitions. [2021-03-10 21:31:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:35,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:35,021 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:35,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9389 [2021-03-10 21:31:35,221 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1418991852, now seen corresponding path program 236 times [2021-03-10 21:31:35,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:35,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256231354] [2021-03-10 21:31:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256231354] [2021-03-10 21:31:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014905020] [2021-03-10 21:31:35,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:35,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:35,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:35,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:35,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:35,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:35,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:35,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:35,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:35,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:35,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:35,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:35,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890720829] [2021-03-10 21:31:35,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:35,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:35,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:35,930 INFO L87 Difference]: Start difference. First operand 1089 states and 3276 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:36,347 INFO L93 Difference]: Finished difference Result 1220 states and 3550 transitions. [2021-03-10 21:31:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:31:36,348 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:36,349 INFO L225 Difference]: With dead ends: 1220 [2021-03-10 21:31:36,349 INFO L226 Difference]: Without dead ends: 1215 [2021-03-10 21:31:36,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-03-10 21:31:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1090. [2021-03-10 21:31:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.0110192837465566) internal successors, (3279), 1089 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3279 transitions. [2021-03-10 21:31:36,359 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3279 transitions. Word has length 20 [2021-03-10 21:31:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:36,359 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3279 transitions. [2021-03-10 21:31:36,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3279 transitions. [2021-03-10 21:31:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:36,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:36,360 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:36,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9390,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:36,560 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2138611179, now seen corresponding path program 237 times [2021-03-10 21:31:36,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:36,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967892435] [2021-03-10 21:31:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:36,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967892435] [2021-03-10 21:31:36,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529268247] [2021-03-10 21:31:36,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:36,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:31:36,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:36,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:31:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:36,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:36,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:31:36,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408963075] [2021-03-10 21:31:36,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:31:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:31:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:36,666 INFO L87 Difference]: Start difference. First operand 1090 states and 3279 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:36,773 INFO L93 Difference]: Finished difference Result 1834 states and 5241 transitions. [2021-03-10 21:31:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:31:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:36,775 INFO L225 Difference]: With dead ends: 1834 [2021-03-10 21:31:36,775 INFO L226 Difference]: Without dead ends: 1834 [2021-03-10 21:31:36,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-03-10 21:31:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1516. [2021-03-10 21:31:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.0613861386138614) internal successors, (4638), 1515 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4638 transitions. [2021-03-10 21:31:36,790 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4638 transitions. Word has length 20 [2021-03-10 21:31:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:36,790 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 4638 transitions. [2021-03-10 21:31:36,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4638 transitions. [2021-03-10 21:31:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:36,792 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:36,792 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:36,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9525,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:36,992 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash 67979132, now seen corresponding path program 238 times [2021-03-10 21:31:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:36,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060971285] [2021-03-10 21:31:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:31:37,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060971285] [2021-03-10 21:31:37,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242292972] [2021-03-10 21:31:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:37,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:37,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:37,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:37,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:37,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:37,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:37,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:37,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:37,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:31:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881782985] [2021-03-10 21:31:37,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:31:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:31:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:37,870 INFO L87 Difference]: Start difference. First operand 1516 states and 4638 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:38,197 INFO L93 Difference]: Finished difference Result 1539 states and 4677 transitions. [2021-03-10 21:31:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:31:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:38,199 INFO L225 Difference]: With dead ends: 1539 [2021-03-10 21:31:38,199 INFO L226 Difference]: Without dead ends: 1524 [2021-03-10 21:31:38,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-03-10 21:31:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1514. [2021-03-10 21:31:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.060806345009914) internal successors, (4631), 1513 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4631 transitions. [2021-03-10 21:31:38,214 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4631 transitions. Word has length 20 [2021-03-10 21:31:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:38,214 INFO L480 AbstractCegarLoop]: Abstraction has 1514 states and 4631 transitions. [2021-03-10 21:31:38,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4631 transitions. [2021-03-10 21:31:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:38,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:38,216 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:38,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9526,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:38,416 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:38,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1559917892, now seen corresponding path program 239 times [2021-03-10 21:31:38,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:38,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643092130] [2021-03-10 21:31:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:38,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643092130] [2021-03-10 21:31:38,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849657623] [2021-03-10 21:31:38,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:38,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:31:38,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:38,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:38,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:39,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:39,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:39,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:39,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:39,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:39,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:39,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062103282] [2021-03-10 21:31:39,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:39,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:39,401 INFO L87 Difference]: Start difference. First operand 1514 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:39,821 INFO L93 Difference]: Finished difference Result 1653 states and 4904 transitions. [2021-03-10 21:31:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:31:39,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:39,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:39,824 INFO L225 Difference]: With dead ends: 1653 [2021-03-10 21:31:39,824 INFO L226 Difference]: Without dead ends: 1640 [2021-03-10 21:31:39,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-03-10 21:31:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1514. [2021-03-10 21:31:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.056179775280899) internal successors, (4624), 1513 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4624 transitions. [2021-03-10 21:31:39,838 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4624 transitions. Word has length 20 [2021-03-10 21:31:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:39,838 INFO L480 AbstractCegarLoop]: Abstraction has 1514 states and 4624 transitions. [2021-03-10 21:31:39,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4624 transitions. [2021-03-10 21:31:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:39,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:39,840 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:40,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9747,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:40,040 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1232376888, now seen corresponding path program 240 times [2021-03-10 21:31:40,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:40,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89058065] [2021-03-10 21:31:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89058065] [2021-03-10 21:31:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084866779] [2021-03-10 21:31:40,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:40,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:31:40,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:40,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:40,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:40,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:40,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:40,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:40,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:40,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:40,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:40,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:40,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053413958] [2021-03-10 21:31:40,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:40,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:40,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:40,630 INFO L87 Difference]: Start difference. First operand 1514 states and 4624 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:41,007 INFO L93 Difference]: Finished difference Result 1609 states and 4809 transitions. [2021-03-10 21:31:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:41,010 INFO L225 Difference]: With dead ends: 1609 [2021-03-10 21:31:41,010 INFO L226 Difference]: Without dead ends: 1604 [2021-03-10 21:31:41,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-03-10 21:31:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1517. [2021-03-10 21:31:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.058047493403694) internal successors, (4636), 1516 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4636 transitions. [2021-03-10 21:31:41,027 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4636 transitions. Word has length 20 [2021-03-10 21:31:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:41,027 INFO L480 AbstractCegarLoop]: Abstraction has 1517 states and 4636 transitions. [2021-03-10 21:31:41,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4636 transitions. [2021-03-10 21:31:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:41,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:41,028 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:41,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10017 [2021-03-10 21:31:41,229 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash -493102570, now seen corresponding path program 241 times [2021-03-10 21:31:41,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:41,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098092746] [2021-03-10 21:31:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:41,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098092746] [2021-03-10 21:31:41,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274862865] [2021-03-10 21:31:41,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:41,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:41,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:41,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:42,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:42,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:42,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:42,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:42,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:42,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:42,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348685107] [2021-03-10 21:31:42,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:42,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:42,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:42,092 INFO L87 Difference]: Start difference. First operand 1517 states and 4636 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:42,463 INFO L93 Difference]: Finished difference Result 1614 states and 4819 transitions. [2021-03-10 21:31:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:42,466 INFO L225 Difference]: With dead ends: 1614 [2021-03-10 21:31:42,466 INFO L226 Difference]: Without dead ends: 1605 [2021-03-10 21:31:42,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-10 21:31:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1515. [2021-03-10 21:31:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-03-10 21:31:42,481 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-03-10 21:31:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:42,481 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-03-10 21:31:42,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-03-10 21:31:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:42,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:42,483 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:42,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10115,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:42,683 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 996302426, now seen corresponding path program 242 times [2021-03-10 21:31:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:42,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10555116] [2021-03-10 21:31:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:42,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10555116] [2021-03-10 21:31:42,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5277723] [2021-03-10 21:31:42,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:42,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:42,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:43,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:43,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:43,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:43,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:43,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:43,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:43,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:43,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:43,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705784442] [2021-03-10 21:31:43,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:43,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:43,607 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:43,868 INFO L93 Difference]: Finished difference Result 1606 states and 4806 transitions. [2021-03-10 21:31:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:43,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:43,870 INFO L225 Difference]: With dead ends: 1606 [2021-03-10 21:31:43,870 INFO L226 Difference]: Without dead ends: 1601 [2021-03-10 21:31:43,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-03-10 21:31:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1515. [2021-03-10 21:31:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-03-10 21:31:43,884 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-03-10 21:31:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:43,884 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-03-10 21:31:43,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-03-10 21:31:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:43,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:43,886 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:44,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10330 [2021-03-10 21:31:44,095 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:44,095 INFO L82 PathProgramCache]: Analyzing trace with hash -76782954, now seen corresponding path program 243 times [2021-03-10 21:31:44,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:44,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833600338] [2021-03-10 21:31:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833600338] [2021-03-10 21:31:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074680416] [2021-03-10 21:31:44,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:44,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:31:44,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:44,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:44,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:44,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:44,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:44,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:44,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:44,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:44,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:44,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:44,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:44,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105300886] [2021-03-10 21:31:44,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:44,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:44,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:44,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:44,653 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:45,088 INFO L93 Difference]: Finished difference Result 1644 states and 4888 transitions. [2021-03-10 21:31:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:31:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:45,090 INFO L225 Difference]: With dead ends: 1644 [2021-03-10 21:31:45,090 INFO L226 Difference]: Without dead ends: 1631 [2021-03-10 21:31:45,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-03-10 21:31:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1515. [2021-03-10 21:31:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.0574636723910174) internal successors, (4629), 1514 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4629 transitions. [2021-03-10 21:31:45,104 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4629 transitions. Word has length 20 [2021-03-10 21:31:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:45,104 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4629 transitions. [2021-03-10 21:31:45,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4629 transitions. [2021-03-10 21:31:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:45,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:45,106 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:45,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10592,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:45,306 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:45,306 INFO L82 PathProgramCache]: Analyzing trace with hash 642836373, now seen corresponding path program 244 times [2021-03-10 21:31:45,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:45,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159942162] [2021-03-10 21:31:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159942162] [2021-03-10 21:31:45,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520752414] [2021-03-10 21:31:45,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:45,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:45,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:45,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:31:45,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:45,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:31:45,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107228130] [2021-03-10 21:31:45,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:31:45,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:31:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:31:45,419 INFO L87 Difference]: Start difference. First operand 1515 states and 4629 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:45,516 INFO L93 Difference]: Finished difference Result 1871 states and 5337 transitions. [2021-03-10 21:31:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:31:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:45,518 INFO L225 Difference]: With dead ends: 1871 [2021-03-10 21:31:45,518 INFO L226 Difference]: Without dead ends: 1871 [2021-03-10 21:31:45,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-03-10 21:31:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1073. [2021-03-10 21:31:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-03-10 21:31:45,531 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-03-10 21:31:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:45,531 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-03-10 21:31:45,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-03-10 21:31:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:45,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:45,532 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:45,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10658,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:45,732 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1017308634, now seen corresponding path program 245 times [2021-03-10 21:31:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:45,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006667716] [2021-03-10 21:31:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006667716] [2021-03-10 21:31:45,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595694184] [2021-03-10 21:31:45,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:45,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:31:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:45,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:46,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:46,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:46,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:46,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:46,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:46,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:46,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:46,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:46,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417133829] [2021-03-10 21:31:46,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:46,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:46,527 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:47,022 INFO L93 Difference]: Finished difference Result 1252 states and 3621 transitions. [2021-03-10 21:31:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:47,024 INFO L225 Difference]: With dead ends: 1252 [2021-03-10 21:31:47,024 INFO L226 Difference]: Without dead ends: 1247 [2021-03-10 21:31:47,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-03-10 21:31:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1073. [2021-03-10 21:31:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-03-10 21:31:47,034 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-03-10 21:31:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:47,034 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-03-10 21:31:47,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-03-10 21:31:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:47,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:47,035 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:47,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10659 [2021-03-10 21:31:47,236 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:47,236 INFO L82 PathProgramCache]: Analyzing trace with hash 136490107, now seen corresponding path program 246 times [2021-03-10 21:31:47,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:47,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102509933] [2021-03-10 21:31:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:47,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102509933] [2021-03-10 21:31:47,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318609852] [2021-03-10 21:31:47,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:47,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:31:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:31:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:47,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:47,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:31:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660450816] [2021-03-10 21:31:47,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:31:47,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:31:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:31:47,348 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:47,476 INFO L93 Difference]: Finished difference Result 1821 states and 5166 transitions. [2021-03-10 21:31:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:31:47,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:47,478 INFO L225 Difference]: With dead ends: 1821 [2021-03-10 21:31:47,478 INFO L226 Difference]: Without dead ends: 1821 [2021-03-10 21:31:47,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-10 21:31:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1372. [2021-03-10 21:31:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.047410649161196) internal successors, (4178), 1371 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4178 transitions. [2021-03-10 21:31:47,492 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4178 transitions. Word has length 20 [2021-03-10 21:31:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:47,492 INFO L480 AbstractCegarLoop]: Abstraction has 1372 states and 4178 transitions. [2021-03-10 21:31:47,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4178 transitions. [2021-03-10 21:31:47,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:47,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:47,494 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:47,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10850 [2021-03-10 21:31:47,694 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1110932366, now seen corresponding path program 247 times [2021-03-10 21:31:47,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:47,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410796442] [2021-03-10 21:31:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:47,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410796442] [2021-03-10 21:31:47,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086528724] [2021-03-10 21:31:47,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:48,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:48,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:48,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:48,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:48,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:48,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:48,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:48,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:48,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951140751] [2021-03-10 21:31:48,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:48,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:48,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:48,356 INFO L87 Difference]: Start difference. First operand 1372 states and 4178 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:48,707 INFO L93 Difference]: Finished difference Result 1418 states and 4257 transitions. [2021-03-10 21:31:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:48,709 INFO L225 Difference]: With dead ends: 1418 [2021-03-10 21:31:48,709 INFO L226 Difference]: Without dead ends: 1386 [2021-03-10 21:31:48,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-03-10 21:31:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1374. [2021-03-10 21:31:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0458849235251275) internal successors, (4182), 1373 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4182 transitions. [2021-03-10 21:31:48,722 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4182 transitions. Word has length 20 [2021-03-10 21:31:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:48,722 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4182 transitions. [2021-03-10 21:31:48,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4182 transitions. [2021-03-10 21:31:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:48,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:48,723 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:48,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10851 [2021-03-10 21:31:48,937 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash -519119568, now seen corresponding path program 248 times [2021-03-10 21:31:48,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:48,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643840399] [2021-03-10 21:31:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:49,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643840399] [2021-03-10 21:31:49,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115802936] [2021-03-10 21:31:49,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:49,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:49,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:49,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:49,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:49,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:49,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:49,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:49,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:49,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:49,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804125396] [2021-03-10 21:31:49,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:49,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:49,537 INFO L87 Difference]: Start difference. First operand 1374 states and 4182 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:49,905 INFO L93 Difference]: Finished difference Result 1463 states and 4324 transitions. [2021-03-10 21:31:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:49,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:49,907 INFO L225 Difference]: With dead ends: 1463 [2021-03-10 21:31:49,907 INFO L226 Difference]: Without dead ends: 1440 [2021-03-10 21:31:49,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-03-10 21:31:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1374. [2021-03-10 21:31:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0356882738528768) internal successors, (4168), 1373 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4168 transitions. [2021-03-10 21:31:49,921 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4168 transitions. Word has length 20 [2021-03-10 21:31:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:49,921 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4168 transitions. [2021-03-10 21:31:49,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4168 transitions. [2021-03-10 21:31:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:49,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:49,923 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:50,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10991 [2021-03-10 21:31:50,124 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:50,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1592204948, now seen corresponding path program 249 times [2021-03-10 21:31:50,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:50,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977408882] [2021-03-10 21:31:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:50,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977408882] [2021-03-10 21:31:50,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41598437] [2021-03-10 21:31:50,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:50,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:31:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:50,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:50,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:50,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:50,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:50,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:50,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:50,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:50,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:50,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941547784] [2021-03-10 21:31:50,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:50,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:50,749 INFO L87 Difference]: Start difference. First operand 1374 states and 4168 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:51,261 INFO L93 Difference]: Finished difference Result 1493 states and 4350 transitions. [2021-03-10 21:31:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:31:51,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:51,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:51,263 INFO L225 Difference]: With dead ends: 1493 [2021-03-10 21:31:51,263 INFO L226 Difference]: Without dead ends: 1464 [2021-03-10 21:31:51,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-03-10 21:31:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1374. [2021-03-10 21:31:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0276766205389656) internal successors, (4157), 1373 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4157 transitions. [2021-03-10 21:31:51,276 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4157 transitions. Word has length 20 [2021-03-10 21:31:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:51,277 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4157 transitions. [2021-03-10 21:31:51,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4157 transitions. [2021-03-10 21:31:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:51,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:51,278 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:51,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11088,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:51,478 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash -498113360, now seen corresponding path program 250 times [2021-03-10 21:31:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:51,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147266707] [2021-03-10 21:31:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:51,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147266707] [2021-03-10 21:31:51,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722596332] [2021-03-10 21:31:51,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:51,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:51,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:51,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:51,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:51,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:52,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:52,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:52,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:52,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:52,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:52,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925161731] [2021-03-10 21:31:52,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:52,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:52,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:52,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:52,085 INFO L87 Difference]: Start difference. First operand 1374 states and 4157 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:52,398 INFO L93 Difference]: Finished difference Result 1523 states and 4457 transitions. [2021-03-10 21:31:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:52,398 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:52,399 INFO L225 Difference]: With dead ends: 1523 [2021-03-10 21:31:52,399 INFO L226 Difference]: Without dead ends: 1508 [2021-03-10 21:31:52,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-03-10 21:31:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1374. [2021-03-10 21:31:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0269482884195194) internal successors, (4156), 1373 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4156 transitions. [2021-03-10 21:31:52,412 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4156 transitions. Word has length 20 [2021-03-10 21:31:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:52,412 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4156 transitions. [2021-03-10 21:31:52,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4156 transitions. [2021-03-10 21:31:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:52,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:52,413 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:52,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11190 [2021-03-10 21:31:52,613 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1134580214, now seen corresponding path program 251 times [2021-03-10 21:31:52,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:52,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788265603] [2021-03-10 21:31:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788265603] [2021-03-10 21:31:52,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475867549] [2021-03-10 21:31:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:52,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:31:52,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:52,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:52,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:53,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:53,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:53,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:53,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:53,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:53,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:53,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:53,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:53,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058574340] [2021-03-10 21:31:53,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:53,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:53,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:53,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:53,650 INFO L87 Difference]: Start difference. First operand 1374 states and 4156 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:54,270 INFO L93 Difference]: Finished difference Result 1525 states and 4427 transitions. [2021-03-10 21:31:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:31:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:54,272 INFO L225 Difference]: With dead ends: 1525 [2021-03-10 21:31:54,272 INFO L226 Difference]: Without dead ends: 1490 [2021-03-10 21:31:54,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-03-10 21:31:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1366. [2021-03-10 21:31:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0278388278388277) internal successors, (4133), 1365 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4133 transitions. [2021-03-10 21:31:54,284 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4133 transitions. Word has length 20 [2021-03-10 21:31:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:54,285 INFO L480 AbstractCegarLoop]: Abstraction has 1366 states and 4133 transitions. [2021-03-10 21:31:54,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4133 transitions. [2021-03-10 21:31:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:54,286 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:54,286 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:54,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11275,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:54,486 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:54,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2107998158, now seen corresponding path program 252 times [2021-03-10 21:31:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:54,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40883177] [2021-03-10 21:31:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:54,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40883177] [2021-03-10 21:31:54,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198074718] [2021-03-10 21:31:54,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:54,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:31:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:54,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:54,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:54,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:54,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:55,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:55,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:55,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:55,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:55,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:55,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:55,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656180968] [2021-03-10 21:31:55,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:55,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:55,058 INFO L87 Difference]: Start difference. First operand 1366 states and 4133 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:55,488 INFO L93 Difference]: Finished difference Result 1431 states and 4256 transitions. [2021-03-10 21:31:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:31:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:55,490 INFO L225 Difference]: With dead ends: 1431 [2021-03-10 21:31:55,490 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 21:31:55,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 21:31:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1364. [2021-03-10 21:31:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-03-10 21:31:55,503 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-03-10 21:31:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:55,503 INFO L480 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-03-10 21:31:55,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-03-10 21:31:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:55,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:55,504 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:55,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11571 [2021-03-10 21:31:55,707 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 382518700, now seen corresponding path program 253 times [2021-03-10 21:31:55,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:55,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39456824] [2021-03-10 21:31:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:55,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39456824] [2021-03-10 21:31:55,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770545950] [2021-03-10 21:31:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:56,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:56,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:56,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:56,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:56,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:56,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:56,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:56,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:56,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143642433] [2021-03-10 21:31:56,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:56,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:56,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:56,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:56,405 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:56,810 INFO L93 Difference]: Finished difference Result 1429 states and 4239 transitions. [2021-03-10 21:31:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:56,812 INFO L225 Difference]: With dead ends: 1429 [2021-03-10 21:31:56,812 INFO L226 Difference]: Without dead ends: 1424 [2021-03-10 21:31:56,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-03-10 21:31:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1364. [2021-03-10 21:31:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-03-10 21:31:56,825 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-03-10 21:31:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:56,825 INFO L480 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-03-10 21:31:56,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-03-10 21:31:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:56,826 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:56,826 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:57,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11659,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:57,027 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1871923696, now seen corresponding path program 254 times [2021-03-10 21:31:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:57,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816496418] [2021-03-10 21:31:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:57,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816496418] [2021-03-10 21:31:57,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6944429] [2021-03-10 21:31:57,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:57,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:57,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:57,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:57,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:57,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:57,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:57,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:57,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:57,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:58,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:58,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499403556] [2021-03-10 21:31:58,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:58,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:58,006 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:58,449 INFO L93 Difference]: Finished difference Result 1463 states and 4289 transitions. [2021-03-10 21:31:58,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:31:58,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:58,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:58,451 INFO L225 Difference]: With dead ends: 1463 [2021-03-10 21:31:58,451 INFO L226 Difference]: Without dead ends: 1440 [2021-03-10 21:31:58,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-03-10 21:31:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1366. [2021-03-10 21:31:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0065934065934066) internal successors, (4104), 1365 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4104 transitions. [2021-03-10 21:31:58,464 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4104 transitions. Word has length 20 [2021-03-10 21:31:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:58,464 INFO L480 AbstractCegarLoop]: Abstraction has 1366 states and 4104 transitions. [2021-03-10 21:31:58,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4104 transitions. [2021-03-10 21:31:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:58,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:58,465 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:58,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11809 [2021-03-10 21:31:58,667 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:58,667 INFO L82 PathProgramCache]: Analyzing trace with hash 980602065, now seen corresponding path program 255 times [2021-03-10 21:31:58,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:58,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893168783] [2021-03-10 21:31:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893168783] [2021-03-10 21:31:58,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408125764] [2021-03-10 21:31:58,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:58,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:31:58,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:31:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:58,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:31:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878477878] [2021-03-10 21:31:58,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:31:58,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:31:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:58,784 INFO L87 Difference]: Start difference. First operand 1366 states and 4104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:58,864 INFO L93 Difference]: Finished difference Result 1698 states and 4827 transitions. [2021-03-10 21:31:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:31:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:31:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:58,866 INFO L225 Difference]: With dead ends: 1698 [2021-03-10 21:31:58,866 INFO L226 Difference]: Without dead ends: 1698 [2021-03-10 21:31:58,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:31:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-03-10 21:31:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1390. [2021-03-10 21:31:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-03-10 21:31:58,880 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-03-10 21:31:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:58,880 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-03-10 21:31:58,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-03-10 21:31:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:31:58,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:58,882 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:59,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12111,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:59,082 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:59,082 INFO L82 PathProgramCache]: Analyzing trace with hash 798838316, now seen corresponding path program 256 times [2021-03-10 21:31:59,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:59,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585697211] [2021-03-10 21:31:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:59,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585697211] [2021-03-10 21:31:59,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083460892] [2021-03-10 21:31:59,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:59,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:59,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:59,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:59,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:59,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:31:59,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:59,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:59,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:59,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:59,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:59,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494291873] [2021-03-10 21:31:59,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:59,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:59,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:59,779 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:00,216 INFO L93 Difference]: Finished difference Result 1514 states and 4411 transitions. [2021-03-10 21:32:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:00,217 INFO L225 Difference]: With dead ends: 1514 [2021-03-10 21:32:00,217 INFO L226 Difference]: Without dead ends: 1509 [2021-03-10 21:32:00,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-03-10 21:32:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1390. [2021-03-10 21:32:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-03-10 21:32:00,230 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-03-10 21:32:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:00,231 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-03-10 21:32:00,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-03-10 21:32:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:00,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:00,232 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:00,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12112 [2021-03-10 21:32:00,432 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1892929904, now seen corresponding path program 257 times [2021-03-10 21:32:00,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:00,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334460025] [2021-03-10 21:32:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:00,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334460025] [2021-03-10 21:32:00,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641285590] [2021-03-10 21:32:00,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:00,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:00,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:00,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:00,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:00,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:01,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:01,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:01,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:01,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:01,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:01,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:01,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436869761] [2021-03-10 21:32:01,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:01,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:01,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:01,262 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:01,772 INFO L93 Difference]: Finished difference Result 1554 states and 4501 transitions. [2021-03-10 21:32:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:01,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:01,774 INFO L225 Difference]: With dead ends: 1554 [2021-03-10 21:32:01,774 INFO L226 Difference]: Without dead ends: 1539 [2021-03-10 21:32:01,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-03-10 21:32:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1390. [2021-03-10 21:32:01,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0043196544276456) internal successors, (4173), 1389 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4173 transitions. [2021-03-10 21:32:01,787 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4173 transitions. Word has length 20 [2021-03-10 21:32:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:01,787 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4173 transitions. [2021-03-10 21:32:01,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4173 transitions. [2021-03-10 21:32:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:01,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:01,788 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:01,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12270,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:01,989 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1012111377, now seen corresponding path program 258 times [2021-03-10 21:32:01,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:01,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560014378] [2021-03-10 21:32:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:02,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560014378] [2021-03-10 21:32:02,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092935795] [2021-03-10 21:32:02,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:02,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:02,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:02,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:02,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:02,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309307758] [2021-03-10 21:32:02,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:02,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:02,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:02,097 INFO L87 Difference]: Start difference. First operand 1390 states and 4173 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:02,210 INFO L93 Difference]: Finished difference Result 2615 states and 7716 transitions. [2021-03-10 21:32:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:02,214 INFO L225 Difference]: With dead ends: 2615 [2021-03-10 21:32:02,214 INFO L226 Difference]: Without dead ends: 2615 [2021-03-10 21:32:02,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-03-10 21:32:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2343. [2021-03-10 21:32:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-03-10 21:32:02,238 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-03-10 21:32:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:02,238 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-03-10 21:32:02,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-03-10 21:32:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:02,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:02,240 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:02,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12443 [2021-03-10 21:32:02,440 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1450030764, now seen corresponding path program 259 times [2021-03-10 21:32:02,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:02,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284078394] [2021-03-10 21:32:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:02,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284078394] [2021-03-10 21:32:02,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151816923] [2021-03-10 21:32:02,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:02,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:02,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:03,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:03,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:03,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:03,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:03,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:03,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:03,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133017515] [2021-03-10 21:32:03,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:03,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:03,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:03,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:03,252 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:03,783 INFO L93 Difference]: Finished difference Result 2710 states and 8145 transitions. [2021-03-10 21:32:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:03,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:03,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:03,786 INFO L225 Difference]: With dead ends: 2710 [2021-03-10 21:32:03,786 INFO L226 Difference]: Without dead ends: 2705 [2021-03-10 21:32:03,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:32:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-03-10 21:32:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2343. [2021-03-10 21:32:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-03-10 21:32:03,812 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-03-10 21:32:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:03,812 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-03-10 21:32:03,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-03-10 21:32:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:03,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:03,814 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:04,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12444 [2021-03-10 21:32:04,015 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1799720981, now seen corresponding path program 260 times [2021-03-10 21:32:04,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:04,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638798612] [2021-03-10 21:32:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638798612] [2021-03-10 21:32:04,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138356898] [2021-03-10 21:32:04,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:04,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:04,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:04,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:04,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:04,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064057959] [2021-03-10 21:32:04,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:04,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:04,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:04,136 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:04,322 INFO L93 Difference]: Finished difference Result 3338 states and 9885 transitions. [2021-03-10 21:32:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:04,327 INFO L225 Difference]: With dead ends: 3338 [2021-03-10 21:32:04,327 INFO L226 Difference]: Without dead ends: 3338 [2021-03-10 21:32:04,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-03-10 21:32:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2994. [2021-03-10 21:32:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 3.05913798864016) internal successors, (9156), 2993 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 9156 transitions. [2021-03-10 21:32:04,364 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 9156 transitions. Word has length 20 [2021-03-10 21:32:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:04,364 INFO L480 AbstractCegarLoop]: Abstraction has 2994 states and 9156 transitions. [2021-03-10 21:32:04,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 9156 transitions. [2021-03-10 21:32:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:04,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:04,367 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:04,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12631 [2021-03-10 21:32:04,567 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1377490808, now seen corresponding path program 261 times [2021-03-10 21:32:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:04,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978929776] [2021-03-10 21:32:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978929776] [2021-03-10 21:32:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848694] [2021-03-10 21:32:04,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:04,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:04,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:04,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:05,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:05,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:05,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:05,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:05,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:05,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:05,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:05,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767527566] [2021-03-10 21:32:05,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:05,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:05,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:05,178 INFO L87 Difference]: Start difference. First operand 2994 states and 9156 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:05,615 INFO L93 Difference]: Finished difference Result 3056 states and 9275 transitions. [2021-03-10 21:32:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:05,618 INFO L225 Difference]: With dead ends: 3056 [2021-03-10 21:32:05,618 INFO L226 Difference]: Without dead ends: 3044 [2021-03-10 21:32:05,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-03-10 21:32:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2990. [2021-03-10 21:32:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 3.0595516895282704) internal successors, (9145), 2989 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 9145 transitions. [2021-03-10 21:32:05,647 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 9145 transitions. Word has length 20 [2021-03-10 21:32:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:05,647 INFO L480 AbstractCegarLoop]: Abstraction has 2990 states and 9145 transitions. [2021-03-10 21:32:05,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 9145 transitions. [2021-03-10 21:32:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:05,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:05,650 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:05,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12632 [2021-03-10 21:32:05,850 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1065396758, now seen corresponding path program 262 times [2021-03-10 21:32:05,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:05,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71687839] [2021-03-10 21:32:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:05,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71687839] [2021-03-10 21:32:05,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290302663] [2021-03-10 21:32:05,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:05,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:05,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:05,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:06,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:06,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:06,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:06,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:06,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:06,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:06,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:06,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833921181] [2021-03-10 21:32:06,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:06,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:06,501 INFO L87 Difference]: Start difference. First operand 2990 states and 9145 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:06,888 INFO L93 Difference]: Finished difference Result 3075 states and 9279 transitions. [2021-03-10 21:32:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:06,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:06,891 INFO L225 Difference]: With dead ends: 3075 [2021-03-10 21:32:06,891 INFO L226 Difference]: Without dead ends: 3062 [2021-03-10 21:32:06,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-03-10 21:32:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2992. [2021-03-10 21:32:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.051822133065864) internal successors, (9128), 2991 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9128 transitions. [2021-03-10 21:32:06,922 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9128 transitions. Word has length 20 [2021-03-10 21:32:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:06,922 INFO L480 AbstractCegarLoop]: Abstraction has 2992 states and 9128 transitions. [2021-03-10 21:32:06,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9128 transitions. [2021-03-10 21:32:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:06,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:06,924 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:07,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12720 [2021-03-10 21:32:07,125 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2135478950, now seen corresponding path program 263 times [2021-03-10 21:32:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:07,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672120031] [2021-03-10 21:32:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:07,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672120031] [2021-03-10 21:32:07,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550076382] [2021-03-10 21:32:07,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:07,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:07,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:07,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:07,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:07,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:07,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:07,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:07,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:07,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:07,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:07,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:07,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125596711] [2021-03-10 21:32:07,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:07,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:07,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:07,866 INFO L87 Difference]: Start difference. First operand 2992 states and 9128 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:08,295 INFO L93 Difference]: Finished difference Result 3101 states and 9293 transitions. [2021-03-10 21:32:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:08,298 INFO L225 Difference]: With dead ends: 3101 [2021-03-10 21:32:08,298 INFO L226 Difference]: Without dead ends: 3076 [2021-03-10 21:32:08,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-03-10 21:32:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2982. [2021-03-10 21:32:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-03-10 21:32:08,328 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-03-10 21:32:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:08,328 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-03-10 21:32:08,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-03-10 21:32:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:08,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:08,330 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:08,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12832 [2021-03-10 21:32:08,530 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:08,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1716589206, now seen corresponding path program 264 times [2021-03-10 21:32:08,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:08,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409011590] [2021-03-10 21:32:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:08,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409011590] [2021-03-10 21:32:08,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99558201] [2021-03-10 21:32:08,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:08,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:32:08,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:08,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:08,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:08,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:08,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:09,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:09,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:09,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:09,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:09,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:09,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:09,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680985882] [2021-03-10 21:32:09,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:09,205 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:09,747 INFO L93 Difference]: Finished difference Result 3164 states and 9474 transitions. [2021-03-10 21:32:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:09,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:09,751 INFO L225 Difference]: With dead ends: 3164 [2021-03-10 21:32:09,751 INFO L226 Difference]: Without dead ends: 3159 [2021-03-10 21:32:09,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:32:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-03-10 21:32:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2982. [2021-03-10 21:32:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-03-10 21:32:09,781 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-03-10 21:32:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:09,781 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-03-10 21:32:09,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-03-10 21:32:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:09,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:09,784 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:09,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12950 [2021-03-10 21:32:09,984 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash -72987268, now seen corresponding path program 265 times [2021-03-10 21:32:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:09,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235585438] [2021-03-10 21:32:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:10,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235585438] [2021-03-10 21:32:10,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463815191] [2021-03-10 21:32:10,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:10,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:10,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:10,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:10,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:10,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:10,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:10,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:10,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:10,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:10,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730910954] [2021-03-10 21:32:10,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:10,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:10,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:10,660 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:11,093 INFO L93 Difference]: Finished difference Result 3032 states and 9158 transitions. [2021-03-10 21:32:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:11,097 INFO L225 Difference]: With dead ends: 3032 [2021-03-10 21:32:11,097 INFO L226 Difference]: Without dead ends: 3022 [2021-03-10 21:32:11,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-03-10 21:32:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2982. [2021-03-10 21:32:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-03-10 21:32:11,128 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-03-10 21:32:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:11,128 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-03-10 21:32:11,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-03-10 21:32:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:11,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:11,131 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:11,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13078,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:11,331 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash -834014084, now seen corresponding path program 266 times [2021-03-10 21:32:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:11,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299538421] [2021-03-10 21:32:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:11,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299538421] [2021-03-10 21:32:11,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968632176] [2021-03-10 21:32:11,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:11,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:11,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:11,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:11,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:12,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:12,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:12,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:12,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:12,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:12,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:12,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470686836] [2021-03-10 21:32:12,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:12,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:12,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:12,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:12,134 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:12,646 INFO L93 Difference]: Finished difference Result 3204 states and 9569 transitions. [2021-03-10 21:32:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:12,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:12,649 INFO L225 Difference]: With dead ends: 3204 [2021-03-10 21:32:12,649 INFO L226 Difference]: Without dead ends: 3187 [2021-03-10 21:32:12,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:32:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-03-10 21:32:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2982. [2021-03-10 21:32:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-03-10 21:32:12,689 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-03-10 21:32:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:12,689 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-03-10 21:32:12,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-03-10 21:32:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:12,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:12,691 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:12,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13210,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:12,892 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash -812513544, now seen corresponding path program 267 times [2021-03-10 21:32:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:12,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229089543] [2021-03-10 21:32:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:12,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229089543] [2021-03-10 21:32:12,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363239679] [2021-03-10 21:32:12,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:12,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:12,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:12,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:13,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:13,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:13,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:13,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:13,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:13,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:13,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:13,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:13,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837525977] [2021-03-10 21:32:13,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:13,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:13,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:13,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:13,462 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:13,781 INFO L93 Difference]: Finished difference Result 3020 states and 9115 transitions. [2021-03-10 21:32:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:13,785 INFO L225 Difference]: With dead ends: 3020 [2021-03-10 21:32:13,785 INFO L226 Difference]: Without dead ends: 3015 [2021-03-10 21:32:13,785 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-03-10 21:32:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2982. [2021-03-10 21:32:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-03-10 21:32:13,815 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-03-10 21:32:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:13,815 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-03-10 21:32:13,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-03-10 21:32:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:13,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:13,818 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:14,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13353,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:14,018 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1756974294, now seen corresponding path program 268 times [2021-03-10 21:32:14,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:14,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690952219] [2021-03-10 21:32:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:14,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690952219] [2021-03-10 21:32:14,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564432365] [2021-03-10 21:32:14,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:14,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:14,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:14,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:14,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:14,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:14,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:14,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:14,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:14,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:14,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:14,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068701029] [2021-03-10 21:32:14,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:14,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:14,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:14,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:14,914 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:15,447 INFO L93 Difference]: Finished difference Result 3037 states and 9140 transitions. [2021-03-10 21:32:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:15,451 INFO L225 Difference]: With dead ends: 3037 [2021-03-10 21:32:15,451 INFO L226 Difference]: Without dead ends: 3032 [2021-03-10 21:32:15,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-03-10 21:32:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2982. [2021-03-10 21:32:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-03-10 21:32:15,482 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-03-10 21:32:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:15,482 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-03-10 21:32:15,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-03-10 21:32:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:15,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:15,485 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:15,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13442,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:15,685 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1048588006, now seen corresponding path program 269 times [2021-03-10 21:32:15,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:15,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930654239] [2021-03-10 21:32:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:15,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930654239] [2021-03-10 21:32:15,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327895812] [2021-03-10 21:32:15,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:15,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:15,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:16,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:16,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:16,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:16,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:16,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:16,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:16,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:16,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:16,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598908531] [2021-03-10 21:32:16,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:16,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:16,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:16,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:16,257 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:16,657 INFO L93 Difference]: Finished difference Result 3082 states and 9238 transitions. [2021-03-10 21:32:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:16,661 INFO L225 Difference]: With dead ends: 3082 [2021-03-10 21:32:16,661 INFO L226 Difference]: Without dead ends: 3077 [2021-03-10 21:32:16,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-03-10 21:32:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2982. [2021-03-10 21:32:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-03-10 21:32:16,693 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-03-10 21:32:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:16,693 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-03-10 21:32:16,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-03-10 21:32:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:16,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:16,695 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:16,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13698 [2021-03-10 21:32:16,895 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2121673386, now seen corresponding path program 270 times [2021-03-10 21:32:16,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:16,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399924029] [2021-03-10 21:32:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:16,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399924029] [2021-03-10 21:32:16,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415513456] [2021-03-10 21:32:16,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:17,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:32:17,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:17,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:17,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:17,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:17,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:17,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:17,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:17,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783904522] [2021-03-10 21:32:17,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:17,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:17,463 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:17,946 INFO L93 Difference]: Finished difference Result 3139 states and 9381 transitions. [2021-03-10 21:32:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:17,949 INFO L225 Difference]: With dead ends: 3139 [2021-03-10 21:32:17,949 INFO L226 Difference]: Without dead ends: 3126 [2021-03-10 21:32:17,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-03-10 21:32:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2986. [2021-03-10 21:32:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.0268006700167502) internal successors, (9035), 2985 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 9035 transitions. [2021-03-10 21:32:17,978 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 9035 transitions. Word has length 20 [2021-03-10 21:32:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:17,978 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 9035 transitions. [2021-03-10 21:32:17,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 9035 transitions. [2021-03-10 21:32:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:17,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:17,980 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:18,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13791,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:18,181 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1402054059, now seen corresponding path program 271 times [2021-03-10 21:32:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:18,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241090312] [2021-03-10 21:32:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:18,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241090312] [2021-03-10 21:32:18,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574607584] [2021-03-10 21:32:18,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:18,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:18,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:18,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:18,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:18,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312078980] [2021-03-10 21:32:18,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:18,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:18,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:18,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:18,306 INFO L87 Difference]: Start difference. First operand 2986 states and 9035 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:18,411 INFO L93 Difference]: Finished difference Result 3429 states and 10006 transitions. [2021-03-10 21:32:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:18,415 INFO L225 Difference]: With dead ends: 3429 [2021-03-10 21:32:18,416 INFO L226 Difference]: Without dead ends: 3429 [2021-03-10 21:32:18,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-03-10 21:32:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2845. [2021-03-10 21:32:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-03-10 21:32:18,449 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-03-10 21:32:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:18,450 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-03-10 21:32:18,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-03-10 21:32:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:18,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:18,452 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:18,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13867 [2021-03-10 21:32:18,652 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1027581798, now seen corresponding path program 272 times [2021-03-10 21:32:18,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:18,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810722668] [2021-03-10 21:32:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:18,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810722668] [2021-03-10 21:32:18,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423850112] [2021-03-10 21:32:18,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:18,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:18,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:18,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:19,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:19,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:19,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:19,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:19,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:19,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:19,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:19,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:19,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016749950] [2021-03-10 21:32:19,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:19,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:19,400 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:19,882 INFO L93 Difference]: Finished difference Result 3008 states and 8868 transitions. [2021-03-10 21:32:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:19,886 INFO L225 Difference]: With dead ends: 3008 [2021-03-10 21:32:19,887 INFO L226 Difference]: Without dead ends: 3003 [2021-03-10 21:32:19,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-03-10 21:32:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2845. [2021-03-10 21:32:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-03-10 21:32:19,924 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-03-10 21:32:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:19,924 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-03-10 21:32:19,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-03-10 21:32:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:19,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:19,927 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:20,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13868 [2021-03-10 21:32:20,127 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1908400325, now seen corresponding path program 273 times [2021-03-10 21:32:20,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:20,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015763554] [2021-03-10 21:32:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:20,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015763554] [2021-03-10 21:32:20,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021355618] [2021-03-10 21:32:20,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:20,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:20,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:20,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:20,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:20,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949341931] [2021-03-10 21:32:20,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:20,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:20,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:20,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:20,240 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:20,327 INFO L93 Difference]: Finished difference Result 3840 states and 11378 transitions. [2021-03-10 21:32:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:20,331 INFO L225 Difference]: With dead ends: 3840 [2021-03-10 21:32:20,331 INFO L226 Difference]: Without dead ends: 3840 [2021-03-10 21:32:20,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2021-03-10 21:32:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 3571. [2021-03-10 21:32:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0103641456582633) internal successors, (10747), 3570 states have internal predecessors, (10747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10747 transitions. [2021-03-10 21:32:20,373 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10747 transitions. Word has length 20 [2021-03-10 21:32:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:20,373 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 10747 transitions. [2021-03-10 21:32:20,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10747 transitions. [2021-03-10 21:32:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:20,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:20,376 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:20,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13992,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:20,576 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1470480938, now seen corresponding path program 274 times [2021-03-10 21:32:20,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:20,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041794196] [2021-03-10 21:32:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041794196] [2021-03-10 21:32:20,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633182694] [2021-03-10 21:32:20,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:20,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:20,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:21,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:21,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:21,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:21,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:21,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:21,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:21,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:21,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856836656] [2021-03-10 21:32:21,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:21,368 INFO L87 Difference]: Start difference. First operand 3571 states and 10747 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:21,827 INFO L93 Difference]: Finished difference Result 3789 states and 11234 transitions. [2021-03-10 21:32:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:21,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:21,831 INFO L225 Difference]: With dead ends: 3789 [2021-03-10 21:32:21,831 INFO L226 Difference]: Without dead ends: 3772 [2021-03-10 21:32:21,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:32:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-03-10 21:32:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3571. [2021-03-10 21:32:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0095238095238095) internal successors, (10744), 3570 states have internal predecessors, (10744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10744 transitions. [2021-03-10 21:32:21,871 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10744 transitions. Word has length 20 [2021-03-10 21:32:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:21,871 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 10744 transitions. [2021-03-10 21:32:21,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10744 transitions. [2021-03-10 21:32:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:21,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:21,873 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:22,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13993,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:22,074 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash -425265387, now seen corresponding path program 275 times [2021-03-10 21:32:22,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:22,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665012270] [2021-03-10 21:32:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665012270] [2021-03-10 21:32:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859877156] [2021-03-10 21:32:22,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:22,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:22,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:22,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:22,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:32:22,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881762800] [2021-03-10 21:32:22,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:32:22,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:22,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:32:22,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:22,194 INFO L87 Difference]: Start difference. First operand 3571 states and 10744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:22,337 INFO L93 Difference]: Finished difference Result 3935 states and 11615 transitions. [2021-03-10 21:32:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:22,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:22,342 INFO L225 Difference]: With dead ends: 3935 [2021-03-10 21:32:22,342 INFO L226 Difference]: Without dead ends: 3935 [2021-03-10 21:32:22,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-03-10 21:32:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3315. [2021-03-10 21:32:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:22,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-03-10 21:32:22,381 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-03-10 21:32:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:22,381 INFO L480 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-03-10 21:32:22,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-03-10 21:32:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:22,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:22,384 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:22,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14169 [2021-03-10 21:32:22,584 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1979514906, now seen corresponding path program 276 times [2021-03-10 21:32:22,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:22,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705606990] [2021-03-10 21:32:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:22,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705606990] [2021-03-10 21:32:22,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900573461] [2021-03-10 21:32:22,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:22,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:22,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:23,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:23,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:23,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:23,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:23,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:23,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:23,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:23,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416952673] [2021-03-10 21:32:23,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:23,193 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:23,709 INFO L93 Difference]: Finished difference Result 3697 states and 10990 transitions. [2021-03-10 21:32:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:23,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:23,713 INFO L225 Difference]: With dead ends: 3697 [2021-03-10 21:32:23,713 INFO L226 Difference]: Without dead ends: 3692 [2021-03-10 21:32:23,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2021-03-10 21:32:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 3315. [2021-03-10 21:32:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-03-10 21:32:23,748 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-03-10 21:32:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:23,748 INFO L480 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-03-10 21:32:23,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-03-10 21:32:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:23,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:23,750 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:23,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14170 [2021-03-10 21:32:23,951 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1692722565, now seen corresponding path program 277 times [2021-03-10 21:32:23,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:23,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090602078] [2021-03-10 21:32:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:24,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090602078] [2021-03-10 21:32:24,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407299836] [2021-03-10 21:32:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:24,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:24,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:24,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:32:24,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388537669] [2021-03-10 21:32:24,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:32:24,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:32:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:24,076 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:24,293 INFO L93 Difference]: Finished difference Result 3902 states and 11479 transitions. [2021-03-10 21:32:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:24,297 INFO L225 Difference]: With dead ends: 3902 [2021-03-10 21:32:24,297 INFO L226 Difference]: Without dead ends: 3902 [2021-03-10 21:32:24,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-03-10 21:32:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3561. [2021-03-10 21:32:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0095505617977527) internal successors, (10714), 3560 states have internal predecessors, (10714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10714 transitions. [2021-03-10 21:32:24,337 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10714 transitions. Word has length 20 [2021-03-10 21:32:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:24,337 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10714 transitions. [2021-03-10 21:32:24,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10714 transitions. [2021-03-10 21:32:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:24,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:24,339 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:24,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14236 [2021-03-10 21:32:24,540 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1050867918, now seen corresponding path program 278 times [2021-03-10 21:32:24,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:24,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750334034] [2021-03-10 21:32:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:24,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750334034] [2021-03-10 21:32:24,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860852196] [2021-03-10 21:32:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:24,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:24,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:24,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:24,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:24,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:25,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:25,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:25,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:25,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:25,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285568510] [2021-03-10 21:32:25,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:25,161 INFO L87 Difference]: Start difference. First operand 3561 states and 10714 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:25,721 INFO L93 Difference]: Finished difference Result 3658 states and 10896 transitions. [2021-03-10 21:32:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:25,725 INFO L225 Difference]: With dead ends: 3658 [2021-03-10 21:32:25,726 INFO L226 Difference]: Without dead ends: 3642 [2021-03-10 21:32:25,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2021-03-10 21:32:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3561. [2021-03-10 21:32:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0070224719101124) internal successors, (10705), 3560 states have internal predecessors, (10705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10705 transitions. [2021-03-10 21:32:25,766 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10705 transitions. Word has length 20 [2021-03-10 21:32:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:25,766 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10705 transitions. [2021-03-10 21:32:25,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10705 transitions. [2021-03-10 21:32:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:25,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:25,769 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:25,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14237 [2021-03-10 21:32:25,969 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1354204688, now seen corresponding path program 279 times [2021-03-10 21:32:25,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:25,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858436493] [2021-03-10 21:32:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:26,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858436493] [2021-03-10 21:32:26,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002047566] [2021-03-10 21:32:26,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:26,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:26,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:26,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:26,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:26,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:26,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:26,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:26,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:26,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:26,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:26,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659445867] [2021-03-10 21:32:26,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:26,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:26,840 INFO L87 Difference]: Start difference. First operand 3561 states and 10705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:27,285 INFO L93 Difference]: Finished difference Result 3663 states and 10877 transitions. [2021-03-10 21:32:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:27,290 INFO L225 Difference]: With dead ends: 3663 [2021-03-10 21:32:27,290 INFO L226 Difference]: Without dead ends: 3648 [2021-03-10 21:32:27,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-03-10 21:32:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3561. [2021-03-10 21:32:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9985955056179776) internal successors, (10675), 3560 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10675 transitions. [2021-03-10 21:32:27,329 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10675 transitions. Word has length 20 [2021-03-10 21:32:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:27,329 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10675 transitions. [2021-03-10 21:32:27,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10675 transitions. [2021-03-10 21:32:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:27,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:27,332 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:27,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14316,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:27,532 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1797103828, now seen corresponding path program 280 times [2021-03-10 21:32:27,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:27,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522577396] [2021-03-10 21:32:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:27,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522577396] [2021-03-10 21:32:27,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325589782] [2021-03-10 21:32:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:27,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:27,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:27,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:27,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:27,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:28,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:28,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:28,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:28,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:28,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:28,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:28,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350858033] [2021-03-10 21:32:28,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:28,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:28,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:28,309 INFO L87 Difference]: Start difference. First operand 3561 states and 10675 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:28,829 INFO L93 Difference]: Finished difference Result 3677 states and 10845 transitions. [2021-03-10 21:32:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:28,829 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:28,833 INFO L225 Difference]: With dead ends: 3677 [2021-03-10 21:32:28,833 INFO L226 Difference]: Without dead ends: 3660 [2021-03-10 21:32:28,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:32:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-03-10 21:32:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3561. [2021-03-10 21:32:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-03-10 21:32:28,872 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-03-10 21:32:28,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:28,872 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-03-10 21:32:28,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-03-10 21:32:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:28,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:28,874 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:29,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14493 [2021-03-10 21:32:29,075 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1652892016, now seen corresponding path program 281 times [2021-03-10 21:32:29,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:29,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560399101] [2021-03-10 21:32:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560399101] [2021-03-10 21:32:29,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594966093] [2021-03-10 21:32:29,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:29,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:29,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:29,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:29,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:29,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:29,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:29,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:29,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:29,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:29,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:29,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096526033] [2021-03-10 21:32:29,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:29,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:29,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:29,994 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:30,421 INFO L93 Difference]: Finished difference Result 3666 states and 10779 transitions. [2021-03-10 21:32:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:32:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:30,425 INFO L225 Difference]: With dead ends: 3666 [2021-03-10 21:32:30,425 INFO L226 Difference]: Without dead ends: 3661 [2021-03-10 21:32:30,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-03-10 21:32:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3561. [2021-03-10 21:32:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-03-10 21:32:30,463 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-03-10 21:32:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:30,463 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-03-10 21:32:30,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-03-10 21:32:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:30,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:30,466 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:30,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14646 [2021-03-10 21:32:30,667 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2136066476, now seen corresponding path program 282 times [2021-03-10 21:32:30,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:30,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645751664] [2021-03-10 21:32:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:30,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645751664] [2021-03-10 21:32:30,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335878383] [2021-03-10 21:32:30,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:30,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:32:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:31,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:31,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:31,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:31,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:31,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:31,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:31,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:31,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:31,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128637509] [2021-03-10 21:32:31,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:31,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:31,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:31,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:31,253 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:31,657 INFO L93 Difference]: Finished difference Result 3633 states and 10776 transitions. [2021-03-10 21:32:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:31,661 INFO L225 Difference]: With dead ends: 3633 [2021-03-10 21:32:31,661 INFO L226 Difference]: Without dead ends: 3623 [2021-03-10 21:32:31,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-03-10 21:32:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3565. [2021-03-10 21:32:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.98625140291807) internal successors, (10643), 3564 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10643 transitions. [2021-03-10 21:32:31,715 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10643 transitions. Word has length 20 [2021-03-10 21:32:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:31,716 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10643 transitions. [2021-03-10 21:32:31,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10643 transitions. [2021-03-10 21:32:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:31,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:31,718 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:31,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14873 [2021-03-10 21:32:31,919 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash -106398646, now seen corresponding path program 283 times [2021-03-10 21:32:31,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:31,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961654116] [2021-03-10 21:32:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:32,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961654116] [2021-03-10 21:32:32,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733076731] [2021-03-10 21:32:32,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:32,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:32,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:32,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:32,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:32,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:32,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:32,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:32,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:32,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732679596] [2021-03-10 21:32:32,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:32,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:32,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:32,601 INFO L87 Difference]: Start difference. First operand 3565 states and 10643 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:33,056 INFO L93 Difference]: Finished difference Result 3684 states and 10816 transitions. [2021-03-10 21:32:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:32:33,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:33,060 INFO L225 Difference]: With dead ends: 3684 [2021-03-10 21:32:33,060 INFO L226 Difference]: Without dead ends: 3665 [2021-03-10 21:32:33,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-03-10 21:32:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3565. [2021-03-10 21:32:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-03-10 21:32:33,095 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-03-10 21:32:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:33,095 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-03-10 21:32:33,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-03-10 21:32:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:33,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:33,098 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:33,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14953 [2021-03-10 21:32:33,298 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1154063090, now seen corresponding path program 284 times [2021-03-10 21:32:33,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:33,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576674282] [2021-03-10 21:32:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576674282] [2021-03-10 21:32:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272388043] [2021-03-10 21:32:33,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:33,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:33,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:34,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:34,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:34,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:34,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:34,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:34,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26135899] [2021-03-10 21:32:34,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:34,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:34,048 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:34,395 INFO L93 Difference]: Finished difference Result 3609 states and 10719 transitions. [2021-03-10 21:32:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:32:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:34,398 INFO L225 Difference]: With dead ends: 3609 [2021-03-10 21:32:34,398 INFO L226 Difference]: Without dead ends: 3604 [2021-03-10 21:32:34,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:34,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-03-10 21:32:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3565. [2021-03-10 21:32:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-03-10 21:32:34,434 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-03-10 21:32:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:34,435 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-03-10 21:32:34,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-03-10 21:32:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:34,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:34,437 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:34,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15083,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:34,638 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1415424748, now seen corresponding path program 285 times [2021-03-10 21:32:34,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:34,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526857676] [2021-03-10 21:32:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526857676] [2021-03-10 21:32:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42317807] [2021-03-10 21:32:34,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:34,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:34,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:34,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:35,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:35,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:35,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:35,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:35,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:35,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:35,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:35,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957947112] [2021-03-10 21:32:35,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:35,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:35,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:35,228 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:35,543 INFO L93 Difference]: Finished difference Result 3624 states and 10731 transitions. [2021-03-10 21:32:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:35,543 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:35,547 INFO L225 Difference]: With dead ends: 3624 [2021-03-10 21:32:35,547 INFO L226 Difference]: Without dead ends: 3619 [2021-03-10 21:32:35,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-03-10 21:32:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3565. [2021-03-10 21:32:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-03-10 21:32:35,596 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-03-10 21:32:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:35,596 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-03-10 21:32:35,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-03-10 21:32:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:35,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:35,598 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:35,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15250 [2021-03-10 21:32:35,799 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash -220599381, now seen corresponding path program 286 times [2021-03-10 21:32:35,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:35,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610026590] [2021-03-10 21:32:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610026590] [2021-03-10 21:32:35,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540760897] [2021-03-10 21:32:35,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:35,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:35,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:35,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:35,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:35,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:35,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702894563] [2021-03-10 21:32:35,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:35,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:35,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:35,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:35,901 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:36,004 INFO L93 Difference]: Finished difference Result 4289 states and 12569 transitions. [2021-03-10 21:32:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:36,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:36,009 INFO L225 Difference]: With dead ends: 4289 [2021-03-10 21:32:36,009 INFO L226 Difference]: Without dead ends: 4289 [2021-03-10 21:32:36,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-03-10 21:32:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3974. [2021-03-10 21:32:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-03-10 21:32:36,057 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-03-10 21:32:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:36,057 INFO L480 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-03-10 21:32:36,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-03-10 21:32:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:36,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:36,060 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:36,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15352,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:36,260 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1390137552, now seen corresponding path program 287 times [2021-03-10 21:32:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:36,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258206597] [2021-03-10 21:32:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258206597] [2021-03-10 21:32:36,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632824227] [2021-03-10 21:32:36,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:36,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:36,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:36,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:36,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:37,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:37,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:37,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:37,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:37,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:37,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465476155] [2021-03-10 21:32:37,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:37,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:37,211 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:37,571 INFO L93 Difference]: Finished difference Result 4051 states and 12046 transitions. [2021-03-10 21:32:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:37,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:37,576 INFO L225 Difference]: With dead ends: 4051 [2021-03-10 21:32:37,576 INFO L226 Difference]: Without dead ends: 4046 [2021-03-10 21:32:37,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-03-10 21:32:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3974. [2021-03-10 21:32:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-03-10 21:32:37,625 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-03-10 21:32:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:37,625 INFO L480 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-03-10 21:32:37,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-03-10 21:32:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:37,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:37,629 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:37,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15353 [2021-03-10 21:32:37,829 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2013508113, now seen corresponding path program 288 times [2021-03-10 21:32:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:37,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070353406] [2021-03-10 21:32:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:37,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070353406] [2021-03-10 21:32:37,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497046601] [2021-03-10 21:32:37,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:37,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:37,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:37,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:37,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:37,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:37,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321788235] [2021-03-10 21:32:37,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:37,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:37,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:37,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:37,932 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:38,063 INFO L93 Difference]: Finished difference Result 4435 states and 12955 transitions. [2021-03-10 21:32:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:38,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:38,068 INFO L225 Difference]: With dead ends: 4435 [2021-03-10 21:32:38,068 INFO L226 Difference]: Without dead ends: 4435 [2021-03-10 21:32:38,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-03-10 21:32:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3990. [2021-03-10 21:32:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-03-10 21:32:38,115 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-03-10 21:32:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:38,115 INFO L480 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-03-10 21:32:38,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-03-10 21:32:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:38,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:38,118 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:38,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15587,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:38,318 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1831744364, now seen corresponding path program 289 times [2021-03-10 21:32:38,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:38,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130907565] [2021-03-10 21:32:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:38,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130907565] [2021-03-10 21:32:38,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597077822] [2021-03-10 21:32:38,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:38,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:38,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:38,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:38,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:39,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:39,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:39,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:39,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:39,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:39,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378595848] [2021-03-10 21:32:39,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:39,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:39,053 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:39,549 INFO L93 Difference]: Finished difference Result 4136 states and 12254 transitions. [2021-03-10 21:32:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:39,553 INFO L225 Difference]: With dead ends: 4136 [2021-03-10 21:32:39,554 INFO L226 Difference]: Without dead ends: 4131 [2021-03-10 21:32:39,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-03-10 21:32:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3990. [2021-03-10 21:32:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-03-10 21:32:39,600 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-03-10 21:32:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:39,600 INFO L480 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-03-10 21:32:39,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-03-10 21:32:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:39,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:39,603 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:39,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15588 [2021-03-10 21:32:39,804 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1743603605, now seen corresponding path program 290 times [2021-03-10 21:32:39,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:39,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544616905] [2021-03-10 21:32:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:39,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544616905] [2021-03-10 21:32:39,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855663922] [2021-03-10 21:32:39,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:39,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:39,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:39,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:39,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:39,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518622769] [2021-03-10 21:32:39,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:39,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:39,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:39,907 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:40,048 INFO L93 Difference]: Finished difference Result 5817 states and 17279 transitions. [2021-03-10 21:32:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:40,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:40,055 INFO L225 Difference]: With dead ends: 5817 [2021-03-10 21:32:40,055 INFO L226 Difference]: Without dead ends: 5817 [2021-03-10 21:32:40,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2021-03-10 21:32:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 5550. [2021-03-10 21:32:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.0131555235177507) internal successors, (16720), 5549 states have internal predecessors, (16720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16720 transitions. [2021-03-10 21:32:40,121 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16720 transitions. Word has length 20 [2021-03-10 21:32:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:40,121 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 16720 transitions. [2021-03-10 21:32:40,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16720 transitions. [2021-03-10 21:32:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:40,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:40,125 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:40,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15746,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:40,326 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1369131344, now seen corresponding path program 291 times [2021-03-10 21:32:40,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:40,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499677800] [2021-03-10 21:32:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:40,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499677800] [2021-03-10 21:32:40,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997143749] [2021-03-10 21:32:40,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:40,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:32:40,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:40,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:40,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:40,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:40,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:40,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:40,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:40,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:40,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:40,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244024091] [2021-03-10 21:32:40,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:40,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:40,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:40,937 INFO L87 Difference]: Start difference. First operand 5550 states and 16720 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:41,506 INFO L93 Difference]: Finished difference Result 5762 states and 17201 transitions. [2021-03-10 21:32:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:41,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:41,512 INFO L225 Difference]: With dead ends: 5762 [2021-03-10 21:32:41,512 INFO L226 Difference]: Without dead ends: 5747 [2021-03-10 21:32:41,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:32:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-03-10 21:32:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5546. [2021-03-10 21:32:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5545 states have (on average 3.012082957619477) internal successors, (16702), 5545 states have internal predecessors, (16702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 16702 transitions. [2021-03-10 21:32:41,580 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 16702 transitions. Word has length 20 [2021-03-10 21:32:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:41,580 INFO L480 AbstractCegarLoop]: Abstraction has 5546 states and 16702 transitions. [2021-03-10 21:32:41,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 16702 transitions. [2021-03-10 21:32:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:41,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:41,584 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:41,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15747 [2021-03-10 21:32:41,785 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:41,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2045017425, now seen corresponding path program 292 times [2021-03-10 21:32:41,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:41,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062058304] [2021-03-10 21:32:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:41,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062058304] [2021-03-10 21:32:41,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316143766] [2021-03-10 21:32:41,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:41,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:41,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:41,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:41,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:41,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:41,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934382322] [2021-03-10 21:32:41,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:41,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:41,895 INFO L87 Difference]: Start difference. First operand 5546 states and 16702 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:42,025 INFO L93 Difference]: Finished difference Result 5777 states and 17109 transitions. [2021-03-10 21:32:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:42,031 INFO L225 Difference]: With dead ends: 5777 [2021-03-10 21:32:42,031 INFO L226 Difference]: Without dead ends: 5777 [2021-03-10 21:32:42,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-03-10 21:32:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5282. [2021-03-10 21:32:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-03-10 21:32:42,090 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-03-10 21:32:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:42,090 INFO L480 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-03-10 21:32:42,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-03-10 21:32:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:42,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:42,093 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:42,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15835 [2021-03-10 21:32:42,293 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1812030484, now seen corresponding path program 293 times [2021-03-10 21:32:42,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:42,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056418906] [2021-03-10 21:32:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:42,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056418906] [2021-03-10 21:32:42,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673328884] [2021-03-10 21:32:42,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:42,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:42,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:42,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:42,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:42,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:42,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:42,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:42,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:42,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:42,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:42,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:42,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840205351] [2021-03-10 21:32:42,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:42,961 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:43,448 INFO L93 Difference]: Finished difference Result 5451 states and 16210 transitions. [2021-03-10 21:32:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:43,453 INFO L225 Difference]: With dead ends: 5451 [2021-03-10 21:32:43,453 INFO L226 Difference]: Without dead ends: 5446 [2021-03-10 21:32:43,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-03-10 21:32:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5282. [2021-03-10 21:32:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-03-10 21:32:43,507 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-03-10 21:32:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:43,507 INFO L480 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-03-10 21:32:43,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-03-10 21:32:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:43,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:43,511 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:43,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15836 [2021-03-10 21:32:43,711 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash -766814933, now seen corresponding path program 294 times [2021-03-10 21:32:43,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:43,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082594075] [2021-03-10 21:32:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:43,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082594075] [2021-03-10 21:32:43,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740570032] [2021-03-10 21:32:43,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:43,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:32:43,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:43,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:43,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:43,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835545553] [2021-03-10 21:32:43,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:43,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:43,828 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:43,934 INFO L93 Difference]: Finished difference Result 5596 states and 16637 transitions. [2021-03-10 21:32:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:43,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:43,939 INFO L225 Difference]: With dead ends: 5596 [2021-03-10 21:32:43,940 INFO L226 Difference]: Without dead ends: 5596 [2021-03-10 21:32:43,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2021-03-10 21:32:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5450. [2021-03-10 21:32:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.998715360616627) internal successors, (16340), 5449 states have internal predecessors, (16340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16340 transitions. [2021-03-10 21:32:43,998 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16340 transitions. Word has length 20 [2021-03-10 21:32:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:43,998 INFO L480 AbstractCegarLoop]: Abstraction has 5450 states and 16340 transitions. [2021-03-10 21:32:43,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16340 transitions. [2021-03-10 21:32:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:44,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:44,002 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:44,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15951 [2021-03-10 21:32:44,207 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1637965360, now seen corresponding path program 295 times [2021-03-10 21:32:44,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194284797] [2021-03-10 21:32:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194284797] [2021-03-10 21:32:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689615501] [2021-03-10 21:32:44,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:44,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:44,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:44,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:44,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:44,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:44,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:44,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:44,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:44,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:44,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058905996] [2021-03-10 21:32:44,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:44,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:44,905 INFO L87 Difference]: Start difference. First operand 5450 states and 16340 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:45,447 INFO L93 Difference]: Finished difference Result 5569 states and 16513 transitions. [2021-03-10 21:32:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:45,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:45,453 INFO L225 Difference]: With dead ends: 5569 [2021-03-10 21:32:45,453 INFO L226 Difference]: Without dead ends: 5550 [2021-03-10 21:32:45,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-03-10 21:32:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5450. [2021-03-10 21:32:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.9981648008808954) internal successors, (16337), 5449 states have internal predecessors, (16337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16337 transitions. [2021-03-10 21:32:45,526 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16337 transitions. Word has length 20 [2021-03-10 21:32:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:45,526 INFO L480 AbstractCegarLoop]: Abstraction has 5450 states and 16337 transitions. [2021-03-10 21:32:45,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16337 transitions. [2021-03-10 21:32:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:45,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:45,530 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:45,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15952 [2021-03-10 21:32:45,730 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:45,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2034272111, now seen corresponding path program 296 times [2021-03-10 21:32:45,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:45,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488627343] [2021-03-10 21:32:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488627343] [2021-03-10 21:32:45,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545249718] [2021-03-10 21:32:45,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:45,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:45,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:45,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:32:45,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391400208] [2021-03-10 21:32:45,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:32:45,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:45,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:32:45,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:45,859 INFO L87 Difference]: Start difference. First operand 5450 states and 16337 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:46,018 INFO L93 Difference]: Finished difference Result 5644 states and 16739 transitions. [2021-03-10 21:32:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:46,024 INFO L225 Difference]: With dead ends: 5644 [2021-03-10 21:32:46,024 INFO L226 Difference]: Without dead ends: 5644 [2021-03-10 21:32:46,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-03-10 21:32:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 5491. [2021-03-10 21:32:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5490 states have (on average 2.9981785063752278) internal successors, (16460), 5490 states have internal predecessors, (16460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 16460 transitions. [2021-03-10 21:32:46,090 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 16460 transitions. Word has length 20 [2021-03-10 21:32:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:46,090 INFO L480 AbstractCegarLoop]: Abstraction has 5491 states and 16460 transitions. [2021-03-10 21:32:46,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,091 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 16460 transitions. [2021-03-10 21:32:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:46,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:46,095 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:46,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16053,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:46,295 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1213654124, now seen corresponding path program 297 times [2021-03-10 21:32:46,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:46,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050273275] [2021-03-10 21:32:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:46,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050273275] [2021-03-10 21:32:46,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979056540] [2021-03-10 21:32:46,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:46,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:46,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:46,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:46,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:47,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:47,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:47,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:47,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:47,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:47,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120239925] [2021-03-10 21:32:47,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:47,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:47,106 INFO L87 Difference]: Start difference. First operand 5491 states and 16460 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:47,700 INFO L93 Difference]: Finished difference Result 7043 states and 21060 transitions. [2021-03-10 21:32:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:47,709 INFO L225 Difference]: With dead ends: 7043 [2021-03-10 21:32:47,709 INFO L226 Difference]: Without dead ends: 7038 [2021-03-10 21:32:47,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:32:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-03-10 21:32:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 5493. [2021-03-10 21:32:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.997632920611799) internal successors, (16463), 5492 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 16463 transitions. [2021-03-10 21:32:47,782 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 16463 transitions. Word has length 20 [2021-03-10 21:32:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:47,782 INFO L480 AbstractCegarLoop]: Abstraction has 5493 states and 16463 transitions. [2021-03-10 21:32:47,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 16463 transitions. [2021-03-10 21:32:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:47,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:47,786 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:47,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16054 [2021-03-10 21:32:47,986 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1624228331, now seen corresponding path program 298 times [2021-03-10 21:32:47,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:47,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639066396] [2021-03-10 21:32:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639066396] [2021-03-10 21:32:48,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062432273] [2021-03-10 21:32:48,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:32:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:48,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:32:48,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756342668] [2021-03-10 21:32:48,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:32:48,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:48,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:32:48,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:48,117 INFO L87 Difference]: Start difference. First operand 5493 states and 16463 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:48,338 INFO L93 Difference]: Finished difference Result 5812 states and 17186 transitions. [2021-03-10 21:32:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:48,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:48,343 INFO L225 Difference]: With dead ends: 5812 [2021-03-10 21:32:48,343 INFO L226 Difference]: Without dead ends: 5812 [2021-03-10 21:32:48,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-03-10 21:32:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5528. [2021-03-10 21:32:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5528 states, 5527 states have (on average 2.99764791025873) internal successors, (16568), 5527 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5528 states to 5528 states and 16568 transitions. [2021-03-10 21:32:48,408 INFO L78 Accepts]: Start accepts. Automaton has 5528 states and 16568 transitions. Word has length 20 [2021-03-10 21:32:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:48,408 INFO L480 AbstractCegarLoop]: Abstraction has 5528 states and 16568 transitions. [2021-03-10 21:32:48,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5528 states and 16568 transitions. [2021-03-10 21:32:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:48,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:48,413 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:48,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16227,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,613 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1322257352, now seen corresponding path program 299 times [2021-03-10 21:32:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:48,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858661650] [2021-03-10 21:32:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858661650] [2021-03-10 21:32:48,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197244641] [2021-03-10 21:32:48,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:48,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:48,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:32:48,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924046506] [2021-03-10 21:32:48,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:32:48,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:48,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:32:48,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:48,751 INFO L87 Difference]: Start difference. First operand 5528 states and 16568 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:48,910 INFO L93 Difference]: Finished difference Result 5709 states and 16848 transitions. [2021-03-10 21:32:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:48,917 INFO L225 Difference]: With dead ends: 5709 [2021-03-10 21:32:48,917 INFO L226 Difference]: Without dead ends: 5703 [2021-03-10 21:32:48,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-03-10 21:32:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5519. [2021-03-10 21:32:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 2.996737948532077) internal successors, (16536), 5518 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 16536 transitions. [2021-03-10 21:32:48,985 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 16536 transitions. Word has length 21 [2021-03-10 21:32:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:48,985 INFO L480 AbstractCegarLoop]: Abstraction has 5519 states and 16536 transitions. [2021-03-10 21:32:48,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 16536 transitions. [2021-03-10 21:32:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:48,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:48,990 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:49,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16228,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:49,190 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:49,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:49,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1554817325, now seen corresponding path program 300 times [2021-03-10 21:32:49,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:49,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773381681] [2021-03-10 21:32:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773381681] [2021-03-10 21:32:49,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143004077] [2021-03-10 21:32:49,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:49,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:49,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:49,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:49,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:32:49,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270338010] [2021-03-10 21:32:49,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:32:49,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:32:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:49,327 INFO L87 Difference]: Start difference. First operand 5519 states and 16536 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:49,559 INFO L93 Difference]: Finished difference Result 5835 states and 17177 transitions. [2021-03-10 21:32:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:49,565 INFO L225 Difference]: With dead ends: 5835 [2021-03-10 21:32:49,566 INFO L226 Difference]: Without dead ends: 5826 [2021-03-10 21:32:49,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-03-10 21:32:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5556. [2021-03-10 21:32:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.996759675967597) internal successors, (16647), 5555 states have internal predecessors, (16647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16647 transitions. [2021-03-10 21:32:49,649 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16647 transitions. Word has length 21 [2021-03-10 21:32:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:49,649 INFO L480 AbstractCegarLoop]: Abstraction has 5556 states and 16647 transitions. [2021-03-10 21:32:49,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16647 transitions. [2021-03-10 21:32:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:49,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:49,652 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:49,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16229 [2021-03-10 21:32:49,852 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash -395399322, now seen corresponding path program 301 times [2021-03-10 21:32:49,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:49,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903613115] [2021-03-10 21:32:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903613115] [2021-03-10 21:32:49,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055378011] [2021-03-10 21:32:49,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:49,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521412164] [2021-03-10 21:32:49,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:49,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:49,971 INFO L87 Difference]: Start difference. First operand 5556 states and 16647 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:50,119 INFO L93 Difference]: Finished difference Result 5621 states and 16745 transitions. [2021-03-10 21:32:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:50,127 INFO L225 Difference]: With dead ends: 5621 [2021-03-10 21:32:50,127 INFO L226 Difference]: Without dead ends: 5617 [2021-03-10 21:32:50,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-03-10 21:32:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 5556. [2021-03-10 21:32:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.9962196219621964) internal successors, (16644), 5555 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16644 transitions. [2021-03-10 21:32:50,211 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16644 transitions. Word has length 21 [2021-03-10 21:32:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:50,211 INFO L480 AbstractCegarLoop]: Abstraction has 5556 states and 16644 transitions. [2021-03-10 21:32:50,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16644 transitions. [2021-03-10 21:32:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:50,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:50,215 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:50,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16230 [2021-03-10 21:32:50,415 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2031423451, now seen corresponding path program 302 times [2021-03-10 21:32:50,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:50,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290665099] [2021-03-10 21:32:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290665099] [2021-03-10 21:32:50,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910179302] [2021-03-10 21:32:50,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:50,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:50,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:50,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447257798] [2021-03-10 21:32:50,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:50,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:50,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:50,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:50,535 INFO L87 Difference]: Start difference. First operand 5556 states and 16644 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:50,622 INFO L93 Difference]: Finished difference Result 5973 states and 17563 transitions. [2021-03-10 21:32:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:50,629 INFO L225 Difference]: With dead ends: 5973 [2021-03-10 21:32:50,630 INFO L226 Difference]: Without dead ends: 5973 [2021-03-10 21:32:50,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-03-10 21:32:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 5549. [2021-03-10 21:32:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994953136265321) internal successors, (16616), 5548 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16616 transitions. [2021-03-10 21:32:50,699 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16616 transitions. Word has length 21 [2021-03-10 21:32:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:50,699 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16616 transitions. [2021-03-10 21:32:50,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16616 transitions. [2021-03-10 21:32:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:50,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:50,704 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:50,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16231 [2021-03-10 21:32:50,904 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash -771235884, now seen corresponding path program 303 times [2021-03-10 21:32:50,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:50,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461947077] [2021-03-10 21:32:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461947077] [2021-03-10 21:32:50,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560075281] [2021-03-10 21:32:50,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:50,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:32:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:50,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:50,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:51,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:51,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832702661] [2021-03-10 21:32:51,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:51,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:51,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:51,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:51,014 INFO L87 Difference]: Start difference. First operand 5549 states and 16616 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:51,163 INFO L93 Difference]: Finished difference Result 5638 states and 16779 transitions. [2021-03-10 21:32:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:51,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:51,170 INFO L225 Difference]: With dead ends: 5638 [2021-03-10 21:32:51,171 INFO L226 Difference]: Without dead ends: 5634 [2021-03-10 21:32:51,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-03-10 21:32:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5549. [2021-03-10 21:32:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-03-10 21:32:51,232 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-03-10 21:32:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:51,232 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-03-10 21:32:51,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-03-10 21:32:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:51,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:51,236 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:51,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16232 [2021-03-10 21:32:51,436 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1662557515, now seen corresponding path program 304 times [2021-03-10 21:32:51,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:51,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810315476] [2021-03-10 21:32:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810315476] [2021-03-10 21:32:51,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172494219] [2021-03-10 21:32:51,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:51,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:51,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:51,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262726183] [2021-03-10 21:32:51,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:51,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:51,554 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:51,646 INFO L93 Difference]: Finished difference Result 6298 states and 18497 transitions. [2021-03-10 21:32:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:51,653 INFO L225 Difference]: With dead ends: 6298 [2021-03-10 21:32:51,653 INFO L226 Difference]: Without dead ends: 6298 [2021-03-10 21:32:51,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2021-03-10 21:32:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 5549. [2021-03-10 21:32:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-03-10 21:32:51,718 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-03-10 21:32:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:51,718 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-03-10 21:32:51,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-03-10 21:32:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:51,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:51,722 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:51,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16233 [2021-03-10 21:32:51,929 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1771892424, now seen corresponding path program 305 times [2021-03-10 21:32:51,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:51,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453940532] [2021-03-10 21:32:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:51,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453940532] [2021-03-10 21:32:51,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023492052] [2021-03-10 21:32:51,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:51,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:51,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:51,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:52,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:52,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:52,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462094333] [2021-03-10 21:32:52,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:52,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:52,037 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:52,131 INFO L93 Difference]: Finished difference Result 5861 states and 17231 transitions. [2021-03-10 21:32:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:52,137 INFO L225 Difference]: With dead ends: 5861 [2021-03-10 21:32:52,137 INFO L226 Difference]: Without dead ends: 5859 [2021-03-10 21:32:52,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-03-10 21:32:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5592. [2021-03-10 21:32:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5592 states, 5591 states have (on average 2.996959399034162) internal successors, (16756), 5591 states have internal predecessors, (16756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 16756 transitions. [2021-03-10 21:32:52,199 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 16756 transitions. Word has length 21 [2021-03-10 21:32:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:52,200 INFO L480 AbstractCegarLoop]: Abstraction has 5592 states and 16756 transitions. [2021-03-10 21:32:52,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 16756 transitions. [2021-03-10 21:32:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:52,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:52,204 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:52,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16234 [2021-03-10 21:32:52,404 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash 994742825, now seen corresponding path program 306 times [2021-03-10 21:32:52,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:52,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652778241] [2021-03-10 21:32:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:52,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652778241] [2021-03-10 21:32:52,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828253314] [2021-03-10 21:32:52,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:52,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:52,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:52,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:52,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:52,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9254517] [2021-03-10 21:32:52,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:52,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:52,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:52,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:52,502 INFO L87 Difference]: Start difference. First operand 5592 states and 16756 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:52,662 INFO L93 Difference]: Finished difference Result 5825 states and 17153 transitions. [2021-03-10 21:32:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:52,669 INFO L225 Difference]: With dead ends: 5825 [2021-03-10 21:32:52,669 INFO L226 Difference]: Without dead ends: 5823 [2021-03-10 21:32:52,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2021-03-10 21:32:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5602. [2021-03-10 21:32:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5601 states have (on average 2.997143367255847) internal successors, (16787), 5601 states have internal predecessors, (16787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 16787 transitions. [2021-03-10 21:32:52,746 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 16787 transitions. Word has length 21 [2021-03-10 21:32:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:52,746 INFO L480 AbstractCegarLoop]: Abstraction has 5602 states and 16787 transitions. [2021-03-10 21:32:52,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 16787 transitions. [2021-03-10 21:32:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:52,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:52,750 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:52,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16235,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:52,951 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1535817962, now seen corresponding path program 307 times [2021-03-10 21:32:52,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:52,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618938851] [2021-03-10 21:32:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:52,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618938851] [2021-03-10 21:32:52,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305958362] [2021-03-10 21:32:53,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:53,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:53,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137050585] [2021-03-10 21:32:53,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:53,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:53,071 INFO L87 Difference]: Start difference. First operand 5602 states and 16787 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:53,221 INFO L93 Difference]: Finished difference Result 5786 states and 17096 transitions. [2021-03-10 21:32:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:53,228 INFO L225 Difference]: With dead ends: 5786 [2021-03-10 21:32:53,228 INFO L226 Difference]: Without dead ends: 5778 [2021-03-10 21:32:53,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2021-03-10 21:32:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 5570. [2021-03-10 21:32:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 2.995151732806608) internal successors, (16680), 5569 states have internal predecessors, (16680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 16680 transitions. [2021-03-10 21:32:53,297 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16680 transitions. Word has length 21 [2021-03-10 21:32:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:53,297 INFO L480 AbstractCegarLoop]: Abstraction has 5570 states and 16680 transitions. [2021-03-10 21:32:53,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16680 transitions. [2021-03-10 21:32:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:53,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:53,301 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:53,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16236 [2021-03-10 21:32:53,501 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:53,502 INFO L82 PathProgramCache]: Analyzing trace with hash 644496331, now seen corresponding path program 308 times [2021-03-10 21:32:53,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:53,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135929681] [2021-03-10 21:32:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135929681] [2021-03-10 21:32:53,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249232272] [2021-03-10 21:32:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:53,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:53,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:53,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:53,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973181077] [2021-03-10 21:32:53,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:53,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:53,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:53,613 INFO L87 Difference]: Start difference. First operand 5570 states and 16680 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:53,705 INFO L93 Difference]: Finished difference Result 6267 states and 18410 transitions. [2021-03-10 21:32:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:53,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:53,711 INFO L225 Difference]: With dead ends: 6267 [2021-03-10 21:32:53,711 INFO L226 Difference]: Without dead ends: 6267 [2021-03-10 21:32:53,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-03-10 21:32:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5560. [2021-03-10 21:32:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.99388379204893) internal successors, (16643), 5559 states have internal predecessors, (16643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16643 transitions. [2021-03-10 21:32:53,774 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16643 transitions. Word has length 21 [2021-03-10 21:32:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:53,775 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 16643 transitions. [2021-03-10 21:32:53,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16643 transitions. [2021-03-10 21:32:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:53,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:53,778 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:53,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16237,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:53,978 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash 462732582, now seen corresponding path program 309 times [2021-03-10 21:32:53,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:53,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12488084] [2021-03-10 21:32:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12488084] [2021-03-10 21:32:54,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746030489] [2021-03-10 21:32:54,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:54,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:32:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:54,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:54,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:54,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634811984] [2021-03-10 21:32:54,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:54,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:54,097 INFO L87 Difference]: Start difference. First operand 5560 states and 16643 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:54,244 INFO L93 Difference]: Finished difference Result 5734 states and 16945 transitions. [2021-03-10 21:32:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:54,250 INFO L225 Difference]: With dead ends: 5734 [2021-03-10 21:32:54,250 INFO L226 Difference]: Without dead ends: 5728 [2021-03-10 21:32:54,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2021-03-10 21:32:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 5560. [2021-03-10 21:32:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.993344126641482) internal successors, (16640), 5559 states have internal predecessors, (16640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16640 transitions. [2021-03-10 21:32:54,319 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16640 transitions. Word has length 21 [2021-03-10 21:32:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:54,319 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 16640 transitions. [2021-03-10 21:32:54,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16640 transitions. [2021-03-10 21:32:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:54,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:54,323 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:54,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16238,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:54,524 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:54,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1182351909, now seen corresponding path program 310 times [2021-03-10 21:32:54,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:54,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559754835] [2021-03-10 21:32:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559754835] [2021-03-10 21:32:54,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765674460] [2021-03-10 21:32:54,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:54,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:54,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387156408] [2021-03-10 21:32:54,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:54,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:54,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:54,638 INFO L87 Difference]: Start difference. First operand 5560 states and 16640 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:54,773 INFO L93 Difference]: Finished difference Result 6745 states and 19766 transitions. [2021-03-10 21:32:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:54,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:54,782 INFO L225 Difference]: With dead ends: 6745 [2021-03-10 21:32:54,782 INFO L226 Difference]: Without dead ends: 6745 [2021-03-10 21:32:54,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-03-10 21:32:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 5531. [2021-03-10 21:32:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 5530 states have (on average 2.992405063291139) internal successors, (16548), 5530 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 16548 transitions. [2021-03-10 21:32:54,856 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 16548 transitions. Word has length 21 [2021-03-10 21:32:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:54,856 INFO L480 AbstractCegarLoop]: Abstraction has 5531 states and 16548 transitions. [2021-03-10 21:32:54,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 16548 transitions. [2021-03-10 21:32:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:54,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:54,860 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:55,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16239,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,061 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 276117618, now seen corresponding path program 311 times [2021-03-10 21:32:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:55,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4959260] [2021-03-10 21:32:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4959260] [2021-03-10 21:32:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343275692] [2021-03-10 21:32:55,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:55,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:55,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:55,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:55,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:55,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:55,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281016494] [2021-03-10 21:32:55,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:55,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:55,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:55,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:55,169 INFO L87 Difference]: Start difference. First operand 5531 states and 16548 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:55,258 INFO L93 Difference]: Finished difference Result 5788 states and 17031 transitions. [2021-03-10 21:32:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:55,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:55,265 INFO L225 Difference]: With dead ends: 5788 [2021-03-10 21:32:55,265 INFO L226 Difference]: Without dead ends: 5786 [2021-03-10 21:32:55,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-03-10 21:32:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 5550. [2021-03-10 21:32:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 2.9938727698684446) internal successors, (16613), 5549 states have internal predecessors, (16613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16613 transitions. [2021-03-10 21:32:55,356 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16613 transitions. Word has length 21 [2021-03-10 21:32:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:55,356 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 16613 transitions. [2021-03-10 21:32:55,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16613 transitions. [2021-03-10 21:32:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:55,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:55,359 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:55,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16240,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,560 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:55,560 INFO L82 PathProgramCache]: Analyzing trace with hash -501031981, now seen corresponding path program 312 times [2021-03-10 21:32:55,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:55,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572389701] [2021-03-10 21:32:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:55,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572389701] [2021-03-10 21:32:55,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641026128] [2021-03-10 21:32:55,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:55,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:55,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:55,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468862566] [2021-03-10 21:32:55,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:55,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:55,661 INFO L87 Difference]: Start difference. First operand 5550 states and 16613 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:55,792 INFO L93 Difference]: Finished difference Result 5761 states and 16965 transitions. [2021-03-10 21:32:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:55,797 INFO L225 Difference]: With dead ends: 5761 [2021-03-10 21:32:55,797 INFO L226 Difference]: Without dead ends: 5759 [2021-03-10 21:32:55,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2021-03-10 21:32:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 5562. [2021-03-10 21:32:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.994425463046215) internal successors, (16652), 5561 states have internal predecessors, (16652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16652 transitions. [2021-03-10 21:32:55,856 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16652 transitions. Word has length 21 [2021-03-10 21:32:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:55,856 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 16652 transitions. [2021-03-10 21:32:55,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16652 transitions. [2021-03-10 21:32:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:55,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:55,860 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:56,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16241 [2021-03-10 21:32:56,060 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1033042224, now seen corresponding path program 313 times [2021-03-10 21:32:56,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:56,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212243755] [2021-03-10 21:32:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212243755] [2021-03-10 21:32:56,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435693176] [2021-03-10 21:32:56,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:56,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:56,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935411727] [2021-03-10 21:32:56,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:56,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:56,174 INFO L87 Difference]: Start difference. First operand 5562 states and 16652 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:56,330 INFO L93 Difference]: Finished difference Result 5736 states and 16954 transitions. [2021-03-10 21:32:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:56,336 INFO L225 Difference]: With dead ends: 5736 [2021-03-10 21:32:56,336 INFO L226 Difference]: Without dead ends: 5730 [2021-03-10 21:32:56,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-03-10 21:32:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5534. [2021-03-10 21:32:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 2.9942165190674137) internal successors, (16567), 5533 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 16567 transitions. [2021-03-10 21:32:56,404 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 16567 transitions. Word has length 21 [2021-03-10 21:32:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:56,404 INFO L480 AbstractCegarLoop]: Abstraction has 5534 states and 16567 transitions. [2021-03-10 21:32:56,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 16567 transitions. [2021-03-10 21:32:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:56,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:56,408 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:56,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16242 [2021-03-10 21:32:56,608 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -313422897, now seen corresponding path program 314 times [2021-03-10 21:32:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:56,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920862217] [2021-03-10 21:32:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920862217] [2021-03-10 21:32:56,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294258756] [2021-03-10 21:32:56,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:56,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:56,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:56,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:56,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231909084] [2021-03-10 21:32:56,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:56,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:56,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:56,734 INFO L87 Difference]: Start difference. First operand 5534 states and 16567 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:56,853 INFO L93 Difference]: Finished difference Result 6490 states and 19040 transitions. [2021-03-10 21:32:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:56,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:56,861 INFO L225 Difference]: With dead ends: 6490 [2021-03-10 21:32:56,861 INFO L226 Difference]: Without dead ends: 6490 [2021-03-10 21:32:56,862 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-03-10 21:32:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5526. [2021-03-10 21:32:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 2.9931221719457013) internal successors, (16537), 5525 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 16537 transitions. [2021-03-10 21:32:56,935 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 16537 transitions. Word has length 21 [2021-03-10 21:32:56,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:56,935 INFO L480 AbstractCegarLoop]: Abstraction has 5526 states and 16537 transitions. [2021-03-10 21:32:56,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 16537 transitions. [2021-03-10 21:32:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:56,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:56,939 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:57,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16243 [2021-03-10 21:32:57,140 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:57,140 INFO L82 PathProgramCache]: Analyzing trace with hash 61049364, now seen corresponding path program 315 times [2021-03-10 21:32:57,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:57,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296978035] [2021-03-10 21:32:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296978035] [2021-03-10 21:32:57,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585351546] [2021-03-10 21:32:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:57,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:32:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:57,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:57,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193121170] [2021-03-10 21:32:57,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:57,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:57,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:57,255 INFO L87 Difference]: Start difference. First operand 5526 states and 16537 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:57,395 INFO L93 Difference]: Finished difference Result 5752 states and 17010 transitions. [2021-03-10 21:32:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:57,401 INFO L225 Difference]: With dead ends: 5752 [2021-03-10 21:32:57,401 INFO L226 Difference]: Without dead ends: 5744 [2021-03-10 21:32:57,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2021-03-10 21:32:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 5527. [2021-03-10 21:32:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5526 states have (on average 2.9927614911328266) internal successors, (16538), 5526 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 16538 transitions. [2021-03-10 21:32:57,459 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 16538 transitions. Word has length 21 [2021-03-10 21:32:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:57,459 INFO L480 AbstractCegarLoop]: Abstraction has 5527 states and 16538 transitions. [2021-03-10 21:32:57,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 16538 transitions. [2021-03-10 21:32:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:57,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:57,462 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:57,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16244 [2021-03-10 21:32:57,662 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:57,663 INFO L82 PathProgramCache]: Analyzing trace with hash -819769163, now seen corresponding path program 316 times [2021-03-10 21:32:57,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:57,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163163042] [2021-03-10 21:32:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163163042] [2021-03-10 21:32:57,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610475053] [2021-03-10 21:32:57,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:57,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:57,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:57,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:57,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:57,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605672445] [2021-03-10 21:32:57,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:57,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:57,786 INFO L87 Difference]: Start difference. First operand 5527 states and 16538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:57,943 INFO L93 Difference]: Finished difference Result 7065 states and 20726 transitions. [2021-03-10 21:32:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:57,951 INFO L225 Difference]: With dead ends: 7065 [2021-03-10 21:32:57,951 INFO L226 Difference]: Without dead ends: 7065 [2021-03-10 21:32:57,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2021-03-10 21:32:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 5559. [2021-03-10 21:32:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.9899244332493704) internal successors, (16618), 5558 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16618 transitions. [2021-03-10 21:32:58,019 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16618 transitions. Word has length 21 [2021-03-10 21:32:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:58,019 INFO L480 AbstractCegarLoop]: Abstraction has 5559 states and 16618 transitions. [2021-03-10 21:32:58,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16618 transitions. [2021-03-10 21:32:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:58,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:58,022 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:58,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16245,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:58,222 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:58,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2090839484, now seen corresponding path program 317 times [2021-03-10 21:32:58,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:58,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541294073] [2021-03-10 21:32:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:58,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541294073] [2021-03-10 21:32:58,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415010599] [2021-03-10 21:32:58,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:58,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:58,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:58,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:58,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:58,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852544164] [2021-03-10 21:32:58,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:58,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:58,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:58,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:58,365 INFO L87 Difference]: Start difference. First operand 5559 states and 16618 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:58,527 INFO L93 Difference]: Finished difference Result 5721 states and 16907 transitions. [2021-03-10 21:32:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:58,533 INFO L225 Difference]: With dead ends: 5721 [2021-03-10 21:32:58,533 INFO L226 Difference]: Without dead ends: 5713 [2021-03-10 21:32:58,534 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-03-10 21:32:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5559. [2021-03-10 21:32:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.989564591579705) internal successors, (16616), 5558 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16616 transitions. [2021-03-10 21:32:58,602 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16616 transitions. Word has length 21 [2021-03-10 21:32:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:58,602 INFO L480 AbstractCegarLoop]: Abstraction has 5559 states and 16616 transitions. [2021-03-10 21:32:58,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16616 transitions. [2021-03-10 21:32:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:58,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:58,606 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:58,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16246 [2021-03-10 21:32:58,807 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1323309285, now seen corresponding path program 318 times [2021-03-10 21:32:58,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:58,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219691994] [2021-03-10 21:32:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:58,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219691994] [2021-03-10 21:32:58,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390558071] [2021-03-10 21:32:58,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:58,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:58,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:58,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:32:58,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220231891] [2021-03-10 21:32:58,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:58,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:58,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:58,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:58,930 INFO L87 Difference]: Start difference. First operand 5559 states and 16616 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:59,077 INFO L93 Difference]: Finished difference Result 7043 states and 20681 transitions. [2021-03-10 21:32:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:59,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:59,086 INFO L225 Difference]: With dead ends: 7043 [2021-03-10 21:32:59,086 INFO L226 Difference]: Without dead ends: 7043 [2021-03-10 21:32:59,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2021-03-10 21:32:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 3914. [2021-03-10 21:32:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 2.9608995655507284) internal successors, (11586), 3913 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 11586 transitions. [2021-03-10 21:32:59,147 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 11586 transitions. Word has length 21 [2021-03-10 21:32:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:59,147 INFO L480 AbstractCegarLoop]: Abstraction has 3914 states and 11586 transitions. [2021-03-10 21:32:59,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 11586 transitions. [2021-03-10 21:32:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:59,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:59,149 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:59,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16247 [2021-03-10 21:32:59,350 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:59,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1151738888, now seen corresponding path program 319 times [2021-03-10 21:32:59,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:59,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129537257] [2021-03-10 21:32:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:59,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129537257] [2021-03-10 21:32:59,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289591602] [2021-03-10 21:32:59,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:59,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:59,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:59,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:59,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040489178] [2021-03-10 21:32:59,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:59,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:59,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:59,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:59,455 INFO L87 Difference]: Start difference. First operand 3914 states and 11586 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:59,542 INFO L93 Difference]: Finished difference Result 4174 states and 12068 transitions. [2021-03-10 21:32:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:59,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:32:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:59,547 INFO L225 Difference]: With dead ends: 4174 [2021-03-10 21:32:59,547 INFO L226 Difference]: Without dead ends: 4172 [2021-03-10 21:32:59,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-03-10 21:32:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3916. [2021-03-10 21:32:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.9591315453384417) internal successors, (11585), 3915 states have internal predecessors, (11585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 11585 transitions. [2021-03-10 21:32:59,591 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 11585 transitions. Word has length 21 [2021-03-10 21:32:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:59,591 INFO L480 AbstractCegarLoop]: Abstraction has 3916 states and 11585 transitions. [2021-03-10 21:32:59,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 11585 transitions. [2021-03-10 21:32:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:32:59,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:59,594 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:59,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16248,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:59,795 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash 374589289, now seen corresponding path program 320 times [2021-03-10 21:32:59,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:59,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267850345] [2021-03-10 21:32:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:59,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267850345] [2021-03-10 21:32:59,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740381705] [2021-03-10 21:32:59,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:59,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:59,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:59,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:32:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:59,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:59,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:59,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715305680] [2021-03-10 21:32:59,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:59,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:59,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:59,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:59,896 INFO L87 Difference]: Start difference. First operand 3916 states and 11585 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:00,014 INFO L93 Difference]: Finished difference Result 4111 states and 11901 transitions. [2021-03-10 21:33:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:33:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:00,018 INFO L225 Difference]: With dead ends: 4111 [2021-03-10 21:33:00,018 INFO L226 Difference]: Without dead ends: 4107 [2021-03-10 21:33:00,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-03-10 21:33:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3926. [2021-03-10 21:33:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 2.959235668789809) internal successors, (11615), 3925 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 11615 transitions. [2021-03-10 21:33:00,057 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 11615 transitions. Word has length 21 [2021-03-10 21:33:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:00,058 INFO L480 AbstractCegarLoop]: Abstraction has 3926 states and 11615 transitions. [2021-03-10 21:33:00,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 11615 transitions. [2021-03-10 21:33:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:00,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:00,060 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:00,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16249,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:00,261 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:00,261 INFO L82 PathProgramCache]: Analyzing trace with hash 915664426, now seen corresponding path program 321 times [2021-03-10 21:33:00,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:00,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899572115] [2021-03-10 21:33:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:00,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899572115] [2021-03-10 21:33:00,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706230327] [2021-03-10 21:33:00,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:00,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:33:00,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:00,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:00,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:00,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652785984] [2021-03-10 21:33:00,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:00,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:00,370 INFO L87 Difference]: Start difference. First operand 3926 states and 11615 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:00,516 INFO L93 Difference]: Finished difference Result 4151 states and 11987 transitions. [2021-03-10 21:33:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:33:00,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:00,521 INFO L225 Difference]: With dead ends: 4151 [2021-03-10 21:33:00,521 INFO L226 Difference]: Without dead ends: 4139 [2021-03-10 21:33:00,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-03-10 21:33:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3894. [2021-03-10 21:33:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3893 states have (on average 2.959671204726432) internal successors, (11522), 3893 states have internal predecessors, (11522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 11522 transitions. [2021-03-10 21:33:00,565 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 11522 transitions. Word has length 21 [2021-03-10 21:33:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:00,565 INFO L480 AbstractCegarLoop]: Abstraction has 3894 states and 11522 transitions. [2021-03-10 21:33:00,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 11522 transitions. [2021-03-10 21:33:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:00,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:00,568 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:00,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16250 [2021-03-10 21:33:00,769 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:00,769 INFO L82 PathProgramCache]: Analyzing trace with hash 24342795, now seen corresponding path program 322 times [2021-03-10 21:33:00,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:00,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052173561] [2021-03-10 21:33:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:00,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052173561] [2021-03-10 21:33:00,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155511666] [2021-03-10 21:33:00,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:00,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:00,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:00,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:00,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543714853] [2021-03-10 21:33:00,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:00,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:00,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:00,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:00,877 INFO L87 Difference]: Start difference. First operand 3894 states and 11522 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:00,976 INFO L93 Difference]: Finished difference Result 4318 states and 12449 transitions. [2021-03-10 21:33:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:33:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:00,982 INFO L225 Difference]: With dead ends: 4318 [2021-03-10 21:33:00,982 INFO L226 Difference]: Without dead ends: 4318 [2021-03-10 21:33:00,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:33:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-03-10 21:33:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3872. [2021-03-10 21:33:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9571170240247997) internal successors, (11447), 3871 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11447 transitions. [2021-03-10 21:33:01,026 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11447 transitions. Word has length 21 [2021-03-10 21:33:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:01,026 INFO L480 AbstractCegarLoop]: Abstraction has 3872 states and 11447 transitions. [2021-03-10 21:33:01,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11447 transitions. [2021-03-10 21:33:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:01,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:01,029 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:01,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16251 [2021-03-10 21:33:01,230 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:01,230 INFO L82 PathProgramCache]: Analyzing trace with hash 936670634, now seen corresponding path program 323 times [2021-03-10 21:33:01,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:01,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395898837] [2021-03-10 21:33:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:01,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395898837] [2021-03-10 21:33:01,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970455529] [2021-03-10 21:33:01,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:01,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:33:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:01,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:01,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280672895] [2021-03-10 21:33:01,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:01,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:01,363 INFO L87 Difference]: Start difference. First operand 3872 states and 11447 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:01,548 INFO L93 Difference]: Finished difference Result 4056 states and 11770 transitions. [2021-03-10 21:33:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:33:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:01,552 INFO L225 Difference]: With dead ends: 4056 [2021-03-10 21:33:01,552 INFO L226 Difference]: Without dead ends: 4048 [2021-03-10 21:33:01,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-03-10 21:33:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3878. [2021-03-10 21:33:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.9551199380964666) internal successors, (11457), 3877 states have internal predecessors, (11457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 11457 transitions. [2021-03-10 21:33:01,596 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 11457 transitions. Word has length 21 [2021-03-10 21:33:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:01,596 INFO L480 AbstractCegarLoop]: Abstraction has 3878 states and 11457 transitions. [2021-03-10 21:33:01,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 11457 transitions. [2021-03-10 21:33:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:01,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:01,599 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:01,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16252,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:01,800 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:01,800 INFO L82 PathProgramCache]: Analyzing trace with hash 55852107, now seen corresponding path program 324 times [2021-03-10 21:33:01,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:01,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310014986] [2021-03-10 21:33:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:01,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310014986] [2021-03-10 21:33:01,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88421904] [2021-03-10 21:33:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:01,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:33:01,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:01,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:01,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:01,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:01,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74422514] [2021-03-10 21:33:01,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:01,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:01,933 INFO L87 Difference]: Start difference. First operand 3878 states and 11457 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:02,076 INFO L93 Difference]: Finished difference Result 4744 states and 13653 transitions. [2021-03-10 21:33:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:33:02,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:02,083 INFO L225 Difference]: With dead ends: 4744 [2021-03-10 21:33:02,083 INFO L226 Difference]: Without dead ends: 4744 [2021-03-10 21:33:02,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:33:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-03-10 21:33:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2823. [2021-03-10 21:33:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 2.919206236711552) internal successors, (8238), 2822 states have internal predecessors, (8238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8238 transitions. [2021-03-10 21:33:02,119 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8238 transitions. Word has length 21 [2021-03-10 21:33:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:02,119 INFO L480 AbstractCegarLoop]: Abstraction has 2823 states and 8238 transitions. [2021-03-10 21:33:02,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8238 transitions. [2021-03-10 21:33:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:02,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:02,121 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:02,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16253 [2021-03-10 21:33:02,321 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash 493771494, now seen corresponding path program 325 times [2021-03-10 21:33:02,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:02,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24195680] [2021-03-10 21:33:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24195680] [2021-03-10 21:33:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488736310] [2021-03-10 21:33:02,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:02,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:02,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:02,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669656908] [2021-03-10 21:33:02,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:02,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:02,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:02,463 INFO L87 Difference]: Start difference. First operand 2823 states and 8238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:02,619 INFO L93 Difference]: Finished difference Result 3224 states and 9127 transitions. [2021-03-10 21:33:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:33:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:02,623 INFO L225 Difference]: With dead ends: 3224 [2021-03-10 21:33:02,623 INFO L226 Difference]: Without dead ends: 3214 [2021-03-10 21:33:02,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:33:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-03-10 21:33:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2839. [2021-03-10 21:33:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 2.9147286821705425) internal successors, (8272), 2838 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 8272 transitions. [2021-03-10 21:33:02,653 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 8272 transitions. Word has length 21 [2021-03-10 21:33:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:02,653 INFO L480 AbstractCegarLoop]: Abstraction has 2839 states and 8272 transitions. [2021-03-10 21:33:02,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 8272 transitions. [2021-03-10 21:33:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:02,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:02,655 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:02,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16254 [2021-03-10 21:33:02,855 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1538987045, now seen corresponding path program 326 times [2021-03-10 21:33:02,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:02,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501796994] [2021-03-10 21:33:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:02,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501796994] [2021-03-10 21:33:02,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495872724] [2021-03-10 21:33:02,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:02,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:02,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:02,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:02,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:02,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:02,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638477410] [2021-03-10 21:33:02,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:02,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:02,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:02,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:02,986 INFO L87 Difference]: Start difference. First operand 2839 states and 8272 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:03,198 INFO L93 Difference]: Finished difference Result 5034 states and 14432 transitions. [2021-03-10 21:33:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:03,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:03,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:03,203 INFO L225 Difference]: With dead ends: 5034 [2021-03-10 21:33:03,204 INFO L226 Difference]: Without dead ends: 5034 [2021-03-10 21:33:03,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:33:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-03-10 21:33:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3008. [2021-03-10 21:33:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.9514466245427338) internal successors, (8875), 3007 states have internal predecessors, (8875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8875 transitions. [2021-03-10 21:33:03,242 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8875 transitions. Word has length 21 [2021-03-10 21:33:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:03,242 INFO L480 AbstractCegarLoop]: Abstraction has 3008 states and 8875 transitions. [2021-03-10 21:33:03,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8875 transitions. [2021-03-10 21:33:03,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:03,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:03,244 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:03,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16255 [2021-03-10 21:33:03,445 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273354, now seen corresponding path program 327 times [2021-03-10 21:33:03,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:03,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62730553] [2021-03-10 21:33:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:03,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62730553] [2021-03-10 21:33:03,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329114274] [2021-03-10 21:33:03,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:03,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:03,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:03,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:03,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:03,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082574641] [2021-03-10 21:33:03,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:03,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:03,583 INFO L87 Difference]: Start difference. First operand 3008 states and 8875 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:03,744 INFO L93 Difference]: Finished difference Result 3214 states and 9274 transitions. [2021-03-10 21:33:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:33:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:03,748 INFO L225 Difference]: With dead ends: 3214 [2021-03-10 21:33:03,748 INFO L226 Difference]: Without dead ends: 3204 [2021-03-10 21:33:03,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:33:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-03-10 21:33:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3008. [2021-03-10 21:33:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.950116395078151) internal successors, (8871), 3007 states have internal predecessors, (8871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8871 transitions. [2021-03-10 21:33:03,779 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8871 transitions. Word has length 21 [2021-03-10 21:33:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:03,779 INFO L480 AbstractCegarLoop]: Abstraction has 3008 states and 8871 transitions. [2021-03-10 21:33:03,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8871 transitions. [2021-03-10 21:33:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:03,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:03,781 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:03,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16256 [2021-03-10 21:33:03,981 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash -745057803, now seen corresponding path program 328 times [2021-03-10 21:33:03,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:03,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212545726] [2021-03-10 21:33:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:04,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212545726] [2021-03-10 21:33:04,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707271585] [2021-03-10 21:33:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:04,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:04,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:04,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:04,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151784330] [2021-03-10 21:33:04,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:04,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:04,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:04,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:04,110 INFO L87 Difference]: Start difference. First operand 3008 states and 8871 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:04,298 INFO L93 Difference]: Finished difference Result 3988 states and 11457 transitions. [2021-03-10 21:33:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:33:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:04,303 INFO L225 Difference]: With dead ends: 3988 [2021-03-10 21:33:04,303 INFO L226 Difference]: Without dead ends: 3986 [2021-03-10 21:33:04,303 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-03-10 21:33:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 1933. [2021-03-10 21:33:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9073498964803313) internal successors, (5617), 1932 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5617 transitions. [2021-03-10 21:33:04,331 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5617 transitions. Word has length 21 [2021-03-10 21:33:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:04,331 INFO L480 AbstractCegarLoop]: Abstraction has 1933 states and 5617 transitions. [2021-03-10 21:33:04,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5617 transitions. [2021-03-10 21:33:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:04,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:04,333 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:04,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16257 [2021-03-10 21:33:04,533 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1768772814, now seen corresponding path program 329 times [2021-03-10 21:33:04,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:04,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097564196] [2021-03-10 21:33:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:04,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097564196] [2021-03-10 21:33:04,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110535555] [2021-03-10 21:33:04,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:04,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:04,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:33:04,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:04,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:33:04,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485137858] [2021-03-10 21:33:04,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:33:04,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:33:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:33:04,644 INFO L87 Difference]: Start difference. First operand 1933 states and 5617 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:04,706 INFO L93 Difference]: Finished difference Result 2184 states and 6076 transitions. [2021-03-10 21:33:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:33:04,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:04,709 INFO L225 Difference]: With dead ends: 2184 [2021-03-10 21:33:04,709 INFO L226 Difference]: Without dead ends: 2182 [2021-03-10 21:33:04,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-03-10 21:33:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1921. [2021-03-10 21:33:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 2.9036458333333335) internal successors, (5575), 1920 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 5575 transitions. [2021-03-10 21:33:04,729 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 5575 transitions. Word has length 21 [2021-03-10 21:33:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:04,729 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 5575 transitions. [2021-03-10 21:33:04,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 5575 transitions. [2021-03-10 21:33:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:04,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:04,730 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:04,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16258 [2021-03-10 21:33:04,931 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:04,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1749044883, now seen corresponding path program 330 times [2021-03-10 21:33:04,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:04,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277389715] [2021-03-10 21:33:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:04,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277389715] [2021-03-10 21:33:04,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413330140] [2021-03-10 21:33:04,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:04,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:04,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:04,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:33:05,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:05,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:33:05,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710149540] [2021-03-10 21:33:05,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:33:05,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:33:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:33:05,034 INFO L87 Difference]: Start difference. First operand 1921 states and 5575 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:05,151 INFO L93 Difference]: Finished difference Result 2090 states and 5850 transitions. [2021-03-10 21:33:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:33:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:05,154 INFO L225 Difference]: With dead ends: 2090 [2021-03-10 21:33:05,154 INFO L226 Difference]: Without dead ends: 2086 [2021-03-10 21:33:05,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-03-10 21:33:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1932. [2021-03-10 21:33:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9047125841532884) internal successors, (5609), 1931 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5609 transitions. [2021-03-10 21:33:05,173 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5609 transitions. Word has length 21 [2021-03-10 21:33:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:05,173 INFO L480 AbstractCegarLoop]: Abstraction has 1932 states and 5609 transitions. [2021-03-10 21:33:05,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5609 transitions. [2021-03-10 21:33:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:05,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:05,174 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:05,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16259,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:05,375 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1217034640, now seen corresponding path program 331 times [2021-03-10 21:33:05,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:05,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578406497] [2021-03-10 21:33:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:05,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578406497] [2021-03-10 21:33:05,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143568890] [2021-03-10 21:33:05,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:05,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:05,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:05,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:33:05,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406401697] [2021-03-10 21:33:05,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:05,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:05,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:05,500 INFO L87 Difference]: Start difference. First operand 1932 states and 5609 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:05,665 INFO L93 Difference]: Finished difference Result 2179 states and 6040 transitions. [2021-03-10 21:33:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:05,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:05,668 INFO L225 Difference]: With dead ends: 2179 [2021-03-10 21:33:05,668 INFO L226 Difference]: Without dead ends: 2173 [2021-03-10 21:33:05,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:33:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-03-10 21:33:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1910. [2021-03-10 21:33:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.900995285489785) internal successors, (5538), 1909 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5538 transitions. [2021-03-10 21:33:05,687 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5538 transitions. Word has length 21 [2021-03-10 21:33:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:05,687 INFO L480 AbstractCegarLoop]: Abstraction has 1910 states and 5538 transitions. [2021-03-10 21:33:05,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5538 transitions. [2021-03-10 21:33:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:05,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:05,689 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:05,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16260,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:05,889 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1936653967, now seen corresponding path program 332 times [2021-03-10 21:33:05,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:05,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172273045] [2021-03-10 21:33:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:05,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172273045] [2021-03-10 21:33:05,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253351050] [2021-03-10 21:33:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:05,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:05,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:05,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:06,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:06,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:33:06,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360546406] [2021-03-10 21:33:06,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:06,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:06,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:06,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:06,010 INFO L87 Difference]: Start difference. First operand 1910 states and 5538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:06,119 INFO L93 Difference]: Finished difference Result 2223 states and 6180 transitions. [2021-03-10 21:33:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:33:06,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:06,122 INFO L225 Difference]: With dead ends: 2223 [2021-03-10 21:33:06,122 INFO L226 Difference]: Without dead ends: 2221 [2021-03-10 21:33:06,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-03-10 21:33:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1885. [2021-03-10 21:33:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 2.8959660297239913) internal successors, (5456), 1884 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5456 transitions. [2021-03-10 21:33:06,142 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5456 transitions. Word has length 21 [2021-03-10 21:33:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:06,142 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 5456 transitions. [2021-03-10 21:33:06,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5456 transitions. [2021-03-10 21:33:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:06,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:06,144 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:06,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16261 [2021-03-10 21:33:06,344 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1430307701, now seen corresponding path program 333 times [2021-03-10 21:33:06,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:06,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378044246] [2021-03-10 21:33:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378044246] [2021-03-10 21:33:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188367628] [2021-03-10 21:33:06,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:06,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:06,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:06,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:06,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:06,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:33:06,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724527889] [2021-03-10 21:33:06,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:06,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:06,468 INFO L87 Difference]: Start difference. First operand 1885 states and 5456 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:06,557 INFO L93 Difference]: Finished difference Result 2639 states and 7430 transitions. [2021-03-10 21:33:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:33:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:06,561 INFO L225 Difference]: With dead ends: 2639 [2021-03-10 21:33:06,561 INFO L226 Difference]: Without dead ends: 2639 [2021-03-10 21:33:06,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:33:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-03-10 21:33:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2332. [2021-03-10 21:33:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.891033891033891) internal successors, (6739), 2331 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 6739 transitions. [2021-03-10 21:33:06,588 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 6739 transitions. Word has length 21 [2021-03-10 21:33:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:06,588 INFO L480 AbstractCegarLoop]: Abstraction has 2332 states and 6739 transitions. [2021-03-10 21:33:06,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 6739 transitions. [2021-03-10 21:33:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:06,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:06,590 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:06,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16262 [2021-03-10 21:33:06,795 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:06,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1868227088, now seen corresponding path program 334 times [2021-03-10 21:33:06,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:06,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731279226] [2021-03-10 21:33:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:06,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731279226] [2021-03-10 21:33:06,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049383114] [2021-03-10 21:33:06,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:06,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:06,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:06,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:06,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:06,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:06,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:06,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167357602] [2021-03-10 21:33:06,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:06,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:06,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:06,927 INFO L87 Difference]: Start difference. First operand 2332 states and 6739 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:07,112 INFO L93 Difference]: Finished difference Result 2899 states and 8005 transitions. [2021-03-10 21:33:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:07,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:07,116 INFO L225 Difference]: With dead ends: 2899 [2021-03-10 21:33:07,116 INFO L226 Difference]: Without dead ends: 2889 [2021-03-10 21:33:07,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-03-10 21:33:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2339. [2021-03-10 21:33:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.8896492728828056) internal successors, (6756), 2338 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6756 transitions. [2021-03-10 21:33:07,141 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6756 transitions. Word has length 21 [2021-03-10 21:33:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:07,141 INFO L480 AbstractCegarLoop]: Abstraction has 2339 states and 6756 transitions. [2021-03-10 21:33:07,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6756 transitions. [2021-03-10 21:33:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:07,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:07,143 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:07,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16263 [2021-03-10 21:33:07,343 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:07,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1381524657, now seen corresponding path program 335 times [2021-03-10 21:33:07,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:07,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276623248] [2021-03-10 21:33:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276623248] [2021-03-10 21:33:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993169945] [2021-03-10 21:33:07,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:07,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:07,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:07,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:07,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:07,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288605156] [2021-03-10 21:33:07,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:07,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:07,468 INFO L87 Difference]: Start difference. First operand 2339 states and 6756 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:07,609 INFO L93 Difference]: Finished difference Result 2784 states and 7761 transitions. [2021-03-10 21:33:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:33:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:07,612 INFO L225 Difference]: With dead ends: 2784 [2021-03-10 21:33:07,612 INFO L226 Difference]: Without dead ends: 2784 [2021-03-10 21:33:07,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:33:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-03-10 21:33:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2068. [2021-03-10 21:33:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864537977745525) internal successors, (5921), 2067 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5921 transitions. [2021-03-10 21:33:07,635 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5921 transitions. Word has length 21 [2021-03-10 21:33:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:07,635 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5921 transitions. [2021-03-10 21:33:07,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5921 transitions. [2021-03-10 21:33:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:07,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:07,637 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:07,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16264 [2021-03-10 21:33:07,837 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:07,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1023255636, now seen corresponding path program 336 times [2021-03-10 21:33:07,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:07,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759544912] [2021-03-10 21:33:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:07,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759544912] [2021-03-10 21:33:07,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636641456] [2021-03-10 21:33:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:07,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:07,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:07,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:07,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:07,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:07,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:07,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172843211] [2021-03-10 21:33:07,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:07,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:07,977 INFO L87 Difference]: Start difference. First operand 2068 states and 5921 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:08,103 INFO L93 Difference]: Finished difference Result 2495 states and 6829 transitions. [2021-03-10 21:33:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:08,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:08,107 INFO L225 Difference]: With dead ends: 2495 [2021-03-10 21:33:08,107 INFO L226 Difference]: Without dead ends: 2483 [2021-03-10 21:33:08,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-03-10 21:33:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2068. [2021-03-10 21:33:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864054184808902) internal successors, (5920), 2067 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5920 transitions. [2021-03-10 21:33:08,127 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5920 transitions. Word has length 21 [2021-03-10 21:33:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:08,127 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5920 transitions. [2021-03-10 21:33:08,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5920 transitions. [2021-03-10 21:33:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:08,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:08,129 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:08,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16265 [2021-03-10 21:33:08,329 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1645985461, now seen corresponding path program 337 times [2021-03-10 21:33:08,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:08,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345105474] [2021-03-10 21:33:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:08,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345105474] [2021-03-10 21:33:08,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023311485] [2021-03-10 21:33:08,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:08,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:08,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:08,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:08,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129502695] [2021-03-10 21:33:08,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:08,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:08,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:08,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:08,464 INFO L87 Difference]: Start difference. First operand 2068 states and 5920 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:08,693 INFO L93 Difference]: Finished difference Result 3237 states and 8989 transitions. [2021-03-10 21:33:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:33:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:08,697 INFO L225 Difference]: With dead ends: 3237 [2021-03-10 21:33:08,697 INFO L226 Difference]: Without dead ends: 3237 [2021-03-10 21:33:08,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-03-10 21:33:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2165. [2021-03-10 21:33:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.863678373382625) internal successors, (6197), 2164 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6197 transitions. [2021-03-10 21:33:08,721 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6197 transitions. Word has length 21 [2021-03-10 21:33:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:08,721 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 6197 transitions. [2021-03-10 21:33:08,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6197 transitions. [2021-03-10 21:33:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:08,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:08,723 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:08,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16266,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:08,923 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 94608648, now seen corresponding path program 338 times [2021-03-10 21:33:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:08,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40827214] [2021-03-10 21:33:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:08,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40827214] [2021-03-10 21:33:08,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356444899] [2021-03-10 21:33:08,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:09,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:09,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:09,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:09,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:09,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:09,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:33:09,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738120147] [2021-03-10 21:33:09,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:09,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:09,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:09,049 INFO L87 Difference]: Start difference. First operand 2165 states and 6197 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:09,174 INFO L93 Difference]: Finished difference Result 2340 states and 6503 transitions. [2021-03-10 21:33:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:33:09,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:09,177 INFO L225 Difference]: With dead ends: 2340 [2021-03-10 21:33:09,177 INFO L226 Difference]: Without dead ends: 2336 [2021-03-10 21:33:09,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-03-10 21:33:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2135. [2021-03-10 21:33:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8533270852858483) internal successors, (6089), 2134 states have internal predecessors, (6089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6089 transitions. [2021-03-10 21:33:09,199 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6089 transitions. Word has length 21 [2021-03-10 21:33:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:09,199 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 6089 transitions. [2021-03-10 21:33:09,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6089 transitions. [2021-03-10 21:33:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:09,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:09,200 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:09,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16267 [2021-03-10 21:33:09,401 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash 578153513, now seen corresponding path program 339 times [2021-03-10 21:33:09,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:09,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430904754] [2021-03-10 21:33:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:09,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430904754] [2021-03-10 21:33:09,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79439552] [2021-03-10 21:33:09,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:09,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:09,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:09,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:09,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:33:09,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895159561] [2021-03-10 21:33:09,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:09,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:09,523 INFO L87 Difference]: Start difference. First operand 2135 states and 6089 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:09,716 INFO L93 Difference]: Finished difference Result 2321 states and 6379 transitions. [2021-03-10 21:33:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:33:09,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:09,718 INFO L225 Difference]: With dead ends: 2321 [2021-03-10 21:33:09,718 INFO L226 Difference]: Without dead ends: 2315 [2021-03-10 21:33:09,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-03-10 21:33:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2135. [2021-03-10 21:33:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8509840674789126) internal successors, (6084), 2134 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6084 transitions. [2021-03-10 21:33:09,737 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6084 transitions. Word has length 21 [2021-03-10 21:33:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:09,738 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 6084 transitions. [2021-03-10 21:33:09,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6084 transitions. [2021-03-10 21:33:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:09,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:09,739 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:09,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16268,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:09,940 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1541604198, now seen corresponding path program 340 times [2021-03-10 21:33:09,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:09,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806133525] [2021-03-10 21:33:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:10,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806133525] [2021-03-10 21:33:10,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860725283] [2021-03-10 21:33:10,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:10,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:10,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:10,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:10,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:10,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079981148] [2021-03-10 21:33:10,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:10,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:10,072 INFO L87 Difference]: Start difference. First operand 2135 states and 6084 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:10,249 INFO L93 Difference]: Finished difference Result 2405 states and 6657 transitions. [2021-03-10 21:33:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:10,252 INFO L225 Difference]: With dead ends: 2405 [2021-03-10 21:33:10,252 INFO L226 Difference]: Without dead ends: 2395 [2021-03-10 21:33:10,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-03-10 21:33:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2157. [2021-03-10 21:33:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.8501855287569575) internal successors, (6145), 2156 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6145 transitions. [2021-03-10 21:33:10,274 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6145 transitions. Word has length 21 [2021-03-10 21:33:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:10,274 INFO L480 AbstractCegarLoop]: Abstraction has 2157 states and 6145 transitions. [2021-03-10 21:33:10,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6145 transitions. [2021-03-10 21:33:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:10,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:10,276 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:10,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16269 [2021-03-10 21:33:10,476 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1708147547, now seen corresponding path program 341 times [2021-03-10 21:33:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:10,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698499283] [2021-03-10 21:33:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:10,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698499283] [2021-03-10 21:33:10,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671731004] [2021-03-10 21:33:10,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:10,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:10,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:10,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:10,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:10,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:10,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190893489] [2021-03-10 21:33:10,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:10,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:10,605 INFO L87 Difference]: Start difference. First operand 2157 states and 6145 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:10,749 INFO L93 Difference]: Finished difference Result 2688 states and 7467 transitions. [2021-03-10 21:33:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:33:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:10,752 INFO L225 Difference]: With dead ends: 2688 [2021-03-10 21:33:10,752 INFO L226 Difference]: Without dead ends: 2686 [2021-03-10 21:33:10,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:33:10,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-03-10 21:33:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1554. [2021-03-10 21:33:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8126207340631035) internal successors, (4368), 1553 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4368 transitions. [2021-03-10 21:33:10,771 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4368 transitions. Word has length 21 [2021-03-10 21:33:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:10,771 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4368 transitions. [2021-03-10 21:33:10,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4368 transitions. [2021-03-10 21:33:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:10,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:10,772 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:10,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16270,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:10,973 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash 696632746, now seen corresponding path program 342 times [2021-03-10 21:33:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:10,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223071647] [2021-03-10 21:33:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:11,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223071647] [2021-03-10 21:33:11,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789179073] [2021-03-10 21:33:11,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:11,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:11,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:11,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:11,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:11,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:11,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017011348] [2021-03-10 21:33:11,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:11,109 INFO L87 Difference]: Start difference. First operand 1554 states and 4368 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:11,247 INFO L93 Difference]: Finished difference Result 1983 states and 5292 transitions. [2021-03-10 21:33:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:33:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:11,249 INFO L225 Difference]: With dead ends: 1983 [2021-03-10 21:33:11,249 INFO L226 Difference]: Without dead ends: 1971 [2021-03-10 21:33:11,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:33:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-03-10 21:33:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1554. [2021-03-10 21:33:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8106889890534448) internal successors, (4365), 1553 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4365 transitions. [2021-03-10 21:33:11,264 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4365 transitions. Word has length 21 [2021-03-10 21:33:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:11,264 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4365 transitions. [2021-03-10 21:33:11,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4365 transitions. [2021-03-10 21:33:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:11,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:11,265 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:11,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16271 [2021-03-10 21:33:11,466 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:11,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:11,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1319362571, now seen corresponding path program 343 times [2021-03-10 21:33:11,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:11,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616536102] [2021-03-10 21:33:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:11,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616536102] [2021-03-10 21:33:11,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674701602] [2021-03-10 21:33:11,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:11,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:11,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:11,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:11,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753405317] [2021-03-10 21:33:11,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:11,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:11,600 INFO L87 Difference]: Start difference. First operand 1554 states and 4365 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:11,843 INFO L93 Difference]: Finished difference Result 2612 states and 7115 transitions. [2021-03-10 21:33:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:33:11,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:11,847 INFO L225 Difference]: With dead ends: 2612 [2021-03-10 21:33:11,847 INFO L226 Difference]: Without dead ends: 2612 [2021-03-10 21:33:11,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-03-10 21:33:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1490. [2021-03-10 21:33:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 2.8280725319006046) internal successors, (4211), 1489 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4211 transitions. [2021-03-10 21:33:11,864 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4211 transitions. Word has length 21 [2021-03-10 21:33:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:11,864 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 4211 transitions. [2021-03-10 21:33:11,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4211 transitions. [2021-03-10 21:33:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:11,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:11,865 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:12,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16272,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:12,066 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:12,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1179807206, now seen corresponding path program 344 times [2021-03-10 21:33:12,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:12,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342075114] [2021-03-10 21:33:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342075114] [2021-03-10 21:33:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866017155] [2021-03-10 21:33:12,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:12,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:12,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:12,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:12,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784560400] [2021-03-10 21:33:12,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:12,184 INFO L87 Difference]: Start difference. First operand 1490 states and 4211 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:12,277 INFO L93 Difference]: Finished difference Result 1712 states and 4615 transitions. [2021-03-10 21:33:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:33:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:12,279 INFO L225 Difference]: With dead ends: 1712 [2021-03-10 21:33:12,279 INFO L226 Difference]: Without dead ends: 1712 [2021-03-10 21:33:12,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:33:12,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-03-10 21:33:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1470. [2021-03-10 21:33:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.821647379169503) internal successors, (4145), 1469 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4145 transitions. [2021-03-10 21:33:12,294 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4145 transitions. Word has length 21 [2021-03-10 21:33:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:12,294 INFO L480 AbstractCegarLoop]: Abstraction has 1470 states and 4145 transitions. [2021-03-10 21:33:12,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4145 transitions. [2021-03-10 21:33:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:12,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:12,295 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:12,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16273,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:12,495 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993883, now seen corresponding path program 345 times [2021-03-10 21:33:12,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:12,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364672021] [2021-03-10 21:33:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:12,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364672021] [2021-03-10 21:33:12,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979167695] [2021-03-10 21:33:12,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:12,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:12,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:12,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:12,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:12,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:12,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706825257] [2021-03-10 21:33:12,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:12,600 INFO L87 Difference]: Start difference. First operand 1470 states and 4145 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:12,756 INFO L93 Difference]: Finished difference Result 1612 states and 4366 transitions. [2021-03-10 21:33:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:12,758 INFO L225 Difference]: With dead ends: 1612 [2021-03-10 21:33:12,758 INFO L226 Difference]: Without dead ends: 1608 [2021-03-10 21:33:12,758 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:33:12,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-03-10 21:33:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1454. [2021-03-10 21:33:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 2.8183069511355816) internal successors, (4095), 1453 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4095 transitions. [2021-03-10 21:33:12,772 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4095 transitions. Word has length 21 [2021-03-10 21:33:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:12,772 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 4095 transitions. [2021-03-10 21:33:12,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4095 transitions. [2021-03-10 21:33:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:12,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:12,774 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:12,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16274 [2021-03-10 21:33:12,974 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:12,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:12,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1062657916, now seen corresponding path program 346 times [2021-03-10 21:33:12,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:12,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965123897] [2021-03-10 21:33:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:13,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965123897] [2021-03-10 21:33:13,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31800595] [2021-03-10 21:33:13,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:13,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:13,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:13,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:13,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:13,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:13,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:13,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124544941] [2021-03-10 21:33:13,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:13,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:13,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:13,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:13,106 INFO L87 Difference]: Start difference. First operand 1454 states and 4095 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:13,304 INFO L93 Difference]: Finished difference Result 1781 states and 4786 transitions. [2021-03-10 21:33:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:13,306 INFO L225 Difference]: With dead ends: 1781 [2021-03-10 21:33:13,306 INFO L226 Difference]: Without dead ends: 1769 [2021-03-10 21:33:13,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-03-10 21:33:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1460. [2021-03-10 21:33:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.8115147361206305) internal successors, (4102), 1459 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4102 transitions. [2021-03-10 21:33:13,321 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4102 transitions. Word has length 21 [2021-03-10 21:33:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:13,321 INFO L480 AbstractCegarLoop]: Abstraction has 1460 states and 4102 transitions. [2021-03-10 21:33:13,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4102 transitions. [2021-03-10 21:33:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:13,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:13,322 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:13,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16275 [2021-03-10 21:33:13,522 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash -439928091, now seen corresponding path program 347 times [2021-03-10 21:33:13,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:13,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065402268] [2021-03-10 21:33:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:13,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065402268] [2021-03-10 21:33:13,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752910572] [2021-03-10 21:33:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:13,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:33:13,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:13,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:13,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:13,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:13,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945205151] [2021-03-10 21:33:13,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:13,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:13,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:13,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:13,666 INFO L87 Difference]: Start difference. First operand 1460 states and 4102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:13,884 INFO L93 Difference]: Finished difference Result 1843 states and 4934 transitions. [2021-03-10 21:33:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:13,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:13,886 INFO L225 Difference]: With dead ends: 1843 [2021-03-10 21:33:13,886 INFO L226 Difference]: Without dead ends: 1839 [2021-03-10 21:33:13,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-03-10 21:33:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1157. [2021-03-10 21:33:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7889273356401385) internal successors, (3224), 1156 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3224 transitions. [2021-03-10 21:33:13,899 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3224 transitions. Word has length 21 [2021-03-10 21:33:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:13,899 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3224 transitions. [2021-03-10 21:33:13,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3224 transitions. [2021-03-10 21:33:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:13,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:13,900 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:14,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16276,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:14,100 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:14,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2110322360, now seen corresponding path program 348 times [2021-03-10 21:33:14,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:14,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613614237] [2021-03-10 21:33:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:14,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613614237] [2021-03-10 21:33:14,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576094848] [2021-03-10 21:33:14,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:14,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:14,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:14,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:14,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:14,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:33:14,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118501409] [2021-03-10 21:33:14,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:33:14,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:14,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:33:14,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:33:14,219 INFO L87 Difference]: Start difference. First operand 1157 states and 3224 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:14,292 INFO L93 Difference]: Finished difference Result 1482 states and 3827 transitions. [2021-03-10 21:33:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:33:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:14,294 INFO L225 Difference]: With dead ends: 1482 [2021-03-10 21:33:14,294 INFO L226 Difference]: Without dead ends: 1482 [2021-03-10 21:33:14,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-03-10 21:33:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1173. [2021-03-10 21:33:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.803754266211604) internal successors, (3286), 1172 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3286 transitions. [2021-03-10 21:33:14,305 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3286 transitions. Word has length 21 [2021-03-10 21:33:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:14,305 INFO L480 AbstractCegarLoop]: Abstraction has 1173 states and 3286 transitions. [2021-03-10 21:33:14,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3286 transitions. [2021-03-10 21:33:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:14,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:14,306 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:14,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16277 [2021-03-10 21:33:14,507 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1407495337, now seen corresponding path program 349 times [2021-03-10 21:33:14,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:14,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825744360] [2021-03-10 21:33:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825744360] [2021-03-10 21:33:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141461884] [2021-03-10 21:33:14,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:14,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:14,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:33:14,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343412842] [2021-03-10 21:33:14,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:33:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:33:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:33:14,605 INFO L87 Difference]: Start difference. First operand 1173 states and 3286 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:14,733 INFO L93 Difference]: Finished difference Result 1332 states and 3551 transitions. [2021-03-10 21:33:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:33:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:14,735 INFO L225 Difference]: With dead ends: 1332 [2021-03-10 21:33:14,736 INFO L226 Difference]: Without dead ends: 1330 [2021-03-10 21:33:14,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-03-10 21:33:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1184. [2021-03-10 21:33:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.808114961961116) internal successors, (3322), 1183 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3322 transitions. [2021-03-10 21:33:14,746 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3322 transitions. Word has length 21 [2021-03-10 21:33:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:14,746 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 3322 transitions. [2021-03-10 21:33:14,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3322 transitions. [2021-03-10 21:33:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:14,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:14,747 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:14,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16278,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:14,948 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1948570474, now seen corresponding path program 350 times [2021-03-10 21:33:14,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:14,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87621966] [2021-03-10 21:33:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:14,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87621966] [2021-03-10 21:33:14,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494131727] [2021-03-10 21:33:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:15,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:15,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:15,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:15,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080533467] [2021-03-10 21:33:15,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:15,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:15,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:15,054 INFO L87 Difference]: Start difference. First operand 1184 states and 3322 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:15,188 INFO L93 Difference]: Finished difference Result 1469 states and 3818 transitions. [2021-03-10 21:33:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:33:15,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:15,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:15,190 INFO L225 Difference]: With dead ends: 1469 [2021-03-10 21:33:15,190 INFO L226 Difference]: Without dead ends: 1463 [2021-03-10 21:33:15,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-03-10 21:33:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1184. [2021-03-10 21:33:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.804733727810651) internal successors, (3318), 1183 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3318 transitions. [2021-03-10 21:33:15,201 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3318 transitions. Word has length 21 [2021-03-10 21:33:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:15,201 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 3318 transitions. [2021-03-10 21:33:15,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3318 transitions. [2021-03-10 21:33:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:15,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:15,202 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:15,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16279 [2021-03-10 21:33:15,403 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:15,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1057248843, now seen corresponding path program 351 times [2021-03-10 21:33:15,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:15,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008140460] [2021-03-10 21:33:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008140460] [2021-03-10 21:33:15,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623821138] [2021-03-10 21:33:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:15,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:15,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006675948] [2021-03-10 21:33:15,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:15,518 INFO L87 Difference]: Start difference. First operand 1184 states and 3318 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:15,642 INFO L93 Difference]: Finished difference Result 1448 states and 3844 transitions. [2021-03-10 21:33:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:33:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:15,644 INFO L225 Difference]: With dead ends: 1448 [2021-03-10 21:33:15,644 INFO L226 Difference]: Without dead ends: 1448 [2021-03-10 21:33:15,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-03-10 21:33:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1157. [2021-03-10 21:33:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7949826989619377) internal successors, (3231), 1156 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3231 transitions. [2021-03-10 21:33:15,655 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3231 transitions. Word has length 21 [2021-03-10 21:33:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:15,655 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3231 transitions. [2021-03-10 21:33:15,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3231 transitions. [2021-03-10 21:33:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:15,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:15,656 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:15,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16280,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:15,857 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1969576682, now seen corresponding path program 352 times [2021-03-10 21:33:15,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:15,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848089261] [2021-03-10 21:33:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848089261] [2021-03-10 21:33:15,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652050117] [2021-03-10 21:33:15,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:15,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:15,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514149536] [2021-03-10 21:33:15,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:15,983 INFO L87 Difference]: Start difference. First operand 1157 states and 3231 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:16,175 INFO L93 Difference]: Finished difference Result 1462 states and 3767 transitions. [2021-03-10 21:33:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:33:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:16,177 INFO L225 Difference]: With dead ends: 1462 [2021-03-10 21:33:16,178 INFO L226 Difference]: Without dead ends: 1454 [2021-03-10 21:33:16,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-03-10 21:33:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1157. [2021-03-10 21:33:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7932525951557095) internal successors, (3229), 1156 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3229 transitions. [2021-03-10 21:33:16,189 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3229 transitions. Word has length 21 [2021-03-10 21:33:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:16,189 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3229 transitions. [2021-03-10 21:33:16,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3229 transitions. [2021-03-10 21:33:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:16,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:16,190 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:16,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16281 [2021-03-10 21:33:16,390 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1088758155, now seen corresponding path program 353 times [2021-03-10 21:33:16,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:16,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224805129] [2021-03-10 21:33:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:16,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224805129] [2021-03-10 21:33:16,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821042660] [2021-03-10 21:33:16,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:16,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:33:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:16,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:16,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:16,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975230386] [2021-03-10 21:33:16,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:16,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:16,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:16,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:16,515 INFO L87 Difference]: Start difference. First operand 1157 states and 3229 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:16,636 INFO L93 Difference]: Finished difference Result 1409 states and 3711 transitions. [2021-03-10 21:33:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:33:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:16,637 INFO L225 Difference]: With dead ends: 1409 [2021-03-10 21:33:16,637 INFO L226 Difference]: Without dead ends: 1405 [2021-03-10 21:33:16,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:33:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-03-10 21:33:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1044. [2021-03-10 21:33:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.771812080536913) internal successors, (2891), 1043 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2891 transitions. [2021-03-10 21:33:16,648 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2891 transitions. Word has length 21 [2021-03-10 21:33:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:16,648 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 2891 transitions. [2021-03-10 21:33:16,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2891 transitions. [2021-03-10 21:33:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:16,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:16,649 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:16,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16282,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:16,849 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1723074203, now seen corresponding path program 354 times [2021-03-10 21:33:16,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:16,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507226916] [2021-03-10 21:33:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:16,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507226916] [2021-03-10 21:33:16,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323317612] [2021-03-10 21:33:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:16,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:33:16,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:16,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:16,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:16,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:16,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:16,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750869768] [2021-03-10 21:33:16,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:16,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:16,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:16,988 INFO L87 Difference]: Start difference. First operand 1044 states and 2891 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:17,093 INFO L93 Difference]: Finished difference Result 1522 states and 3994 transitions. [2021-03-10 21:33:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:33:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:17,095 INFO L225 Difference]: With dead ends: 1522 [2021-03-10 21:33:17,095 INFO L226 Difference]: Without dead ends: 1522 [2021-03-10 21:33:17,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-03-10 21:33:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1262. [2021-03-10 21:33:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7731958762886597) internal successors, (3497), 1261 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3497 transitions. [2021-03-10 21:33:17,106 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3497 transitions. Word has length 21 [2021-03-10 21:33:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:17,106 INFO L480 AbstractCegarLoop]: Abstraction has 1262 states and 3497 transitions. [2021-03-10 21:33:17,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3497 transitions. [2021-03-10 21:33:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:17,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:17,107 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:17,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16283 [2021-03-10 21:33:17,308 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:17,308 INFO L82 PathProgramCache]: Analyzing trace with hash 681706090, now seen corresponding path program 355 times [2021-03-10 21:33:17,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:17,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294207376] [2021-03-10 21:33:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:17,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294207376] [2021-03-10 21:33:17,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703756734] [2021-03-10 21:33:17,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:17,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:17,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:17,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726740272] [2021-03-10 21:33:17,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:17,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:17,446 INFO L87 Difference]: Start difference. First operand 1262 states and 3497 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:17,612 INFO L93 Difference]: Finished difference Result 2034 states and 5233 transitions. [2021-03-10 21:33:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:33:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:17,614 INFO L225 Difference]: With dead ends: 2034 [2021-03-10 21:33:17,614 INFO L226 Difference]: Without dead ends: 2022 [2021-03-10 21:33:17,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-03-10 21:33:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1292. [2021-03-10 21:33:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.7683965917893105) internal successors, (3574), 1291 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3574 transitions. [2021-03-10 21:33:17,628 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3574 transitions. Word has length 21 [2021-03-10 21:33:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:17,628 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 3574 transitions. [2021-03-10 21:33:17,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3574 transitions. [2021-03-10 21:33:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:17,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:17,629 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:17,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16284,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:17,829 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1304435915, now seen corresponding path program 356 times [2021-03-10 21:33:17,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:17,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310483595] [2021-03-10 21:33:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:17,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310483595] [2021-03-10 21:33:17,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180754776] [2021-03-10 21:33:17,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:17,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:17,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:17,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:17,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:17,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958979603] [2021-03-10 21:33:17,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:17,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:17,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:17,969 INFO L87 Difference]: Start difference. First operand 1292 states and 3574 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:18,151 INFO L93 Difference]: Finished difference Result 1611 states and 4182 transitions. [2021-03-10 21:33:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:33:18,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:18,153 INFO L225 Difference]: With dead ends: 1611 [2021-03-10 21:33:18,153 INFO L226 Difference]: Without dead ends: 1611 [2021-03-10 21:33:18,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:33:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-03-10 21:33:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1257. [2021-03-10 21:33:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.7619426751592355) internal successors, (3469), 1256 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3469 transitions. [2021-03-10 21:33:18,165 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3469 transitions. Word has length 21 [2021-03-10 21:33:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:18,165 INFO L480 AbstractCegarLoop]: Abstraction has 1257 states and 3469 transitions. [2021-03-10 21:33:18,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3469 transitions. [2021-03-10 21:33:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:18,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:18,166 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:18,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16285 [2021-03-10 21:33:18,366 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash 257394854, now seen corresponding path program 357 times [2021-03-10 21:33:18,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:18,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597404235] [2021-03-10 21:33:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:18,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597404235] [2021-03-10 21:33:18,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3819069] [2021-03-10 21:33:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:18,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:18,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:18,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792881713] [2021-03-10 21:33:18,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:18,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:18,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:18,506 INFO L87 Difference]: Start difference. First operand 1257 states and 3469 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:18,631 INFO L93 Difference]: Finished difference Result 1884 states and 4813 transitions. [2021-03-10 21:33:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:33:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:18,633 INFO L225 Difference]: With dead ends: 1884 [2021-03-10 21:33:18,633 INFO L226 Difference]: Without dead ends: 1870 [2021-03-10 21:33:18,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:33:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-03-10 21:33:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1262. [2021-03-10 21:33:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7573354480570975) internal successors, (3477), 1261 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3477 transitions. [2021-03-10 21:33:18,645 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3477 transitions. Word has length 21 [2021-03-10 21:33:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:18,646 INFO L480 AbstractCegarLoop]: Abstraction has 1262 states and 3477 transitions. [2021-03-10 21:33:18,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3477 transitions. [2021-03-10 21:33:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:18,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:18,647 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:18,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16286,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:18,847 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:18,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:18,847 INFO L82 PathProgramCache]: Analyzing trace with hash 667969061, now seen corresponding path program 358 times [2021-03-10 21:33:18,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:18,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252173608] [2021-03-10 21:33:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:18,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252173608] [2021-03-10 21:33:18,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969250169] [2021-03-10 21:33:18,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:18,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:18,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:18,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:18,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:18,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:18,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45911158] [2021-03-10 21:33:18,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:18,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:18,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:18,999 INFO L87 Difference]: Start difference. First operand 1262 states and 3477 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:19,280 INFO L93 Difference]: Finished difference Result 1832 states and 4763 transitions. [2021-03-10 21:33:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:33:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:19,282 INFO L225 Difference]: With dead ends: 1832 [2021-03-10 21:33:19,282 INFO L226 Difference]: Without dead ends: 1832 [2021-03-10 21:33:19,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=376, Invalid=746, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:33:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-03-10 21:33:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1349. [2021-03-10 21:33:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.770771513353116) internal successors, (3735), 1348 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3735 transitions. [2021-03-10 21:33:19,295 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3735 transitions. Word has length 21 [2021-03-10 21:33:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:19,295 INFO L480 AbstractCegarLoop]: Abstraction has 1349 states and 3735 transitions. [2021-03-10 21:33:19,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3735 transitions. [2021-03-10 21:33:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:19,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:19,296 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:19,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16287 [2021-03-10 21:33:19,496 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:19,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1440766350, now seen corresponding path program 359 times [2021-03-10 21:33:19,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:19,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975100490] [2021-03-10 21:33:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:19,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975100490] [2021-03-10 21:33:19,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032285012] [2021-03-10 21:33:19,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:19,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:33:19,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:19,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:19,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201314591] [2021-03-10 21:33:19,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:19,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:19,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:19,630 INFO L87 Difference]: Start difference. First operand 1349 states and 3735 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:19,781 INFO L93 Difference]: Finished difference Result 1621 states and 4225 transitions. [2021-03-10 21:33:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:33:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:19,784 INFO L225 Difference]: With dead ends: 1621 [2021-03-10 21:33:19,784 INFO L226 Difference]: Without dead ends: 1617 [2021-03-10 21:33:19,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:33:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-03-10 21:33:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1383. [2021-03-10 21:33:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.7836468885672936) internal successors, (3847), 1382 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3847 transitions. [2021-03-10 21:33:19,797 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3847 transitions. Word has length 21 [2021-03-10 21:33:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:19,798 INFO L480 AbstractCegarLoop]: Abstraction has 1383 states and 3847 transitions. [2021-03-10 21:33:19,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3847 transitions. [2021-03-10 21:33:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:19,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:19,799 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:19,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16288 [2021-03-10 21:33:19,999 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:19,999 INFO L82 PathProgramCache]: Analyzing trace with hash -957221485, now seen corresponding path program 360 times [2021-03-10 21:33:19,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:19,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853473744] [2021-03-10 21:33:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:20,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853473744] [2021-03-10 21:33:20,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462131401] [2021-03-10 21:33:20,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:20,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:33:20,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:20,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:20,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:33:20,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564568778] [2021-03-10 21:33:20,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:20,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:20,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:20,138 INFO L87 Difference]: Start difference. First operand 1383 states and 3847 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:20,355 INFO L93 Difference]: Finished difference Result 1662 states and 4335 transitions. [2021-03-10 21:33:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:20,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:20,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:20,357 INFO L225 Difference]: With dead ends: 1662 [2021-03-10 21:33:20,357 INFO L226 Difference]: Without dead ends: 1656 [2021-03-10 21:33:20,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-03-10 21:33:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1398. [2021-03-10 21:33:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7931281317108088) internal successors, (3902), 1397 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3902 transitions. [2021-03-10 21:33:20,371 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3902 transitions. Word has length 21 [2021-03-10 21:33:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:20,371 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 3902 transitions. [2021-03-10 21:33:20,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3902 transitions. [2021-03-10 21:33:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:20,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:20,372 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:20,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16289 [2021-03-10 21:33:20,573 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1489231728, now seen corresponding path program 361 times [2021-03-10 21:33:20,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:20,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760607836] [2021-03-10 21:33:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:20,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760607836] [2021-03-10 21:33:20,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114847497] [2021-03-10 21:33:20,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:20,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:20,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:20,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:20,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881013117] [2021-03-10 21:33:20,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:20,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:20,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:20,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:20,686 INFO L87 Difference]: Start difference. First operand 1398 states and 3902 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:20,837 INFO L93 Difference]: Finished difference Result 1568 states and 4165 transitions. [2021-03-10 21:33:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:20,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:20,840 INFO L225 Difference]: With dead ends: 1568 [2021-03-10 21:33:20,840 INFO L226 Difference]: Without dead ends: 1566 [2021-03-10 21:33:20,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-03-10 21:33:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-03-10 21:33:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7924123120973516) internal successors, (3901), 1397 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3901 transitions. [2021-03-10 21:33:20,853 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3901 transitions. Word has length 21 [2021-03-10 21:33:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:20,853 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 3901 transitions. [2021-03-10 21:33:20,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3901 transitions. [2021-03-10 21:33:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:20,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:20,855 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:21,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16290 [2021-03-10 21:33:21,055 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1169711439, now seen corresponding path program 362 times [2021-03-10 21:33:21,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:21,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017888832] [2021-03-10 21:33:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:21,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017888832] [2021-03-10 21:33:21,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101325459] [2021-03-10 21:33:21,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:21,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:21,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:21,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:21,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:21,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293000271] [2021-03-10 21:33:21,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:21,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:21,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:21,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:21,184 INFO L87 Difference]: Start difference. First operand 1398 states and 3901 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:21,275 INFO L93 Difference]: Finished difference Result 1703 states and 4442 transitions. [2021-03-10 21:33:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:33:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:21,278 INFO L225 Difference]: With dead ends: 1703 [2021-03-10 21:33:21,278 INFO L226 Difference]: Without dead ends: 1703 [2021-03-10 21:33:21,278 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-03-10 21:33:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1399. [2021-03-10 21:33:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.78826895565093) internal successors, (3898), 1398 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 3898 transitions. [2021-03-10 21:33:21,292 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 3898 transitions. Word has length 21 [2021-03-10 21:33:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:21,292 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 3898 transitions. [2021-03-10 21:33:21,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 3898 transitions. [2021-03-10 21:33:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:21,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:21,294 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:21,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16291,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:21,494 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:21,494 INFO L82 PathProgramCache]: Analyzing trace with hash -853668908, now seen corresponding path program 363 times [2021-03-10 21:33:21,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:21,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308127043] [2021-03-10 21:33:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:21,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308127043] [2021-03-10 21:33:21,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738770056] [2021-03-10 21:33:21,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:21,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:33:21,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:21,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:21,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697300971] [2021-03-10 21:33:21,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:21,624 INFO L87 Difference]: Start difference. First operand 1399 states and 3898 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:21,808 INFO L93 Difference]: Finished difference Result 1746 states and 4637 transitions. [2021-03-10 21:33:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:33:21,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:21,810 INFO L225 Difference]: With dead ends: 1746 [2021-03-10 21:33:21,810 INFO L226 Difference]: Without dead ends: 1734 [2021-03-10 21:33:21,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-03-10 21:33:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1419. [2021-03-10 21:33:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.796191819464034) internal successors, (3965), 1418 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 3965 transitions. [2021-03-10 21:33:21,825 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 3965 transitions. Word has length 21 [2021-03-10 21:33:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:21,825 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 3965 transitions. [2021-03-10 21:33:21,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 3965 transitions. [2021-03-10 21:33:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:21,826 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:21,826 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:22,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16292 [2021-03-10 21:33:22,026 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:22,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:22,026 INFO L82 PathProgramCache]: Analyzing trace with hash -230939083, now seen corresponding path program 364 times [2021-03-10 21:33:22,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:22,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613351179] [2021-03-10 21:33:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:22,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613351179] [2021-03-10 21:33:22,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488171903] [2021-03-10 21:33:22,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:22,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:22,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:22,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:22,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:22,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:22,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77499882] [2021-03-10 21:33:22,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:22,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:22,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:22,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:22,169 INFO L87 Difference]: Start difference. First operand 1419 states and 3965 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:22,350 INFO L93 Difference]: Finished difference Result 1714 states and 4627 transitions. [2021-03-10 21:33:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:33:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:22,352 INFO L225 Difference]: With dead ends: 1714 [2021-03-10 21:33:22,352 INFO L226 Difference]: Without dead ends: 1710 [2021-03-10 21:33:22,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-03-10 21:33:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1352. [2021-03-10 21:33:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.7860843819393044) internal successors, (3764), 1351 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3764 transitions. [2021-03-10 21:33:22,365 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3764 transitions. Word has length 21 [2021-03-10 21:33:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:22,365 INFO L480 AbstractCegarLoop]: Abstraction has 1352 states and 3764 transitions. [2021-03-10 21:33:22,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3764 transitions. [2021-03-10 21:33:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:22,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:22,366 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:22,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16293,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:22,567 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1277980144, now seen corresponding path program 365 times [2021-03-10 21:33:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:22,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320157612] [2021-03-10 21:33:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:22,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320157612] [2021-03-10 21:33:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739009817] [2021-03-10 21:33:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:22,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:22,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:22,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:22,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:22,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:22,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:22,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834034762] [2021-03-10 21:33:22,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:22,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:22,702 INFO L87 Difference]: Start difference. First operand 1352 states and 3764 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:22,867 INFO L93 Difference]: Finished difference Result 1892 states and 4939 transitions. [2021-03-10 21:33:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:33:22,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:22,870 INFO L225 Difference]: With dead ends: 1892 [2021-03-10 21:33:22,870 INFO L226 Difference]: Without dead ends: 1878 [2021-03-10 21:33:22,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:33:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-03-10 21:33:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1354. [2021-03-10 21:33:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 2.785661492978566) internal successors, (3769), 1353 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 3769 transitions. [2021-03-10 21:33:22,883 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 3769 transitions. Word has length 21 [2021-03-10 21:33:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:22,883 INFO L480 AbstractCegarLoop]: Abstraction has 1354 states and 3769 transitions. [2021-03-10 21:33:22,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 3769 transitions. [2021-03-10 21:33:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:22,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:22,885 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:23,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16294,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:23,085 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -867405937, now seen corresponding path program 366 times [2021-03-10 21:33:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805871997] [2021-03-10 21:33:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:23,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805871997] [2021-03-10 21:33:23,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822645928] [2021-03-10 21:33:23,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:23,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:33:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:23,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:23,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:23,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622932279] [2021-03-10 21:33:23,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:23,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:23,251 INFO L87 Difference]: Start difference. First operand 1354 states and 3769 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:23,515 INFO L93 Difference]: Finished difference Result 1810 states and 4802 transitions. [2021-03-10 21:33:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:23,517 INFO L225 Difference]: With dead ends: 1810 [2021-03-10 21:33:23,517 INFO L226 Difference]: Without dead ends: 1810 [2021-03-10 21:33:23,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=356, Invalid=700, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:33:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-03-10 21:33:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1323. [2021-03-10 21:33:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 2.793494704992436) internal successors, (3693), 1322 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 3693 transitions. [2021-03-10 21:33:23,530 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 3693 transitions. Word has length 21 [2021-03-10 21:33:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:23,530 INFO L480 AbstractCegarLoop]: Abstraction has 1323 states and 3693 transitions. [2021-03-10 21:33:23,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 3693 transitions. [2021-03-10 21:33:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:23,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:23,531 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:23,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16295 [2021-03-10 21:33:23,731 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 940996534, now seen corresponding path program 367 times [2021-03-10 21:33:23,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:23,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354268169] [2021-03-10 21:33:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:23,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354268169] [2021-03-10 21:33:23,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403402709] [2021-03-10 21:33:23,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:23,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:23,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:23,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:33:23,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846553985] [2021-03-10 21:33:23,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:23,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:23,848 INFO L87 Difference]: Start difference. First operand 1323 states and 3693 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:23,959 INFO L93 Difference]: Finished difference Result 1696 states and 4444 transitions. [2021-03-10 21:33:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:33:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:23,961 INFO L225 Difference]: With dead ends: 1696 [2021-03-10 21:33:23,962 INFO L226 Difference]: Without dead ends: 1696 [2021-03-10 21:33:23,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:33:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-03-10 21:33:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1401. [2021-03-10 21:33:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.8235714285714284) internal successors, (3953), 1400 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3953 transitions. [2021-03-10 21:33:23,975 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3953 transitions. Word has length 21 [2021-03-10 21:33:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:23,975 INFO L480 AbstractCegarLoop]: Abstraction has 1401 states and 3953 transitions. [2021-03-10 21:33:23,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3953 transitions. [2021-03-10 21:33:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:23,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:23,976 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:24,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16296,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:24,176 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1675804555, now seen corresponding path program 368 times [2021-03-10 21:33:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:24,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279054652] [2021-03-10 21:33:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279054652] [2021-03-10 21:33:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845014506] [2021-03-10 21:33:24,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:24,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:24,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:24,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:33:24,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543439714] [2021-03-10 21:33:24,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:24,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:24,295 INFO L87 Difference]: Start difference. First operand 1401 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:24,495 INFO L93 Difference]: Finished difference Result 1640 states and 4370 transitions. [2021-03-10 21:33:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:33:24,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:24,497 INFO L225 Difference]: With dead ends: 1640 [2021-03-10 21:33:24,497 INFO L226 Difference]: Without dead ends: 1636 [2021-03-10 21:33:24,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:33:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-03-10 21:33:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1419. [2021-03-10 21:33:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.8314527503526095) internal successors, (4015), 1418 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4015 transitions. [2021-03-10 21:33:24,512 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4015 transitions. Word has length 21 [2021-03-10 21:33:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:24,512 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4015 transitions. [2021-03-10 21:33:24,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4015 transitions. [2021-03-10 21:33:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:24,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:24,514 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:24,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16297 [2021-03-10 21:33:24,714 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1134729418, now seen corresponding path program 369 times [2021-03-10 21:33:24,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:24,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351422794] [2021-03-10 21:33:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:24,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351422794] [2021-03-10 21:33:24,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214269443] [2021-03-10 21:33:24,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:24,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:33:24,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:24,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:24,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:24,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:24,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321379292] [2021-03-10 21:33:24,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:24,829 INFO L87 Difference]: Start difference. First operand 1419 states and 4015 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:24,967 INFO L93 Difference]: Finished difference Result 1665 states and 4422 transitions. [2021-03-10 21:33:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:24,969 INFO L225 Difference]: With dead ends: 1665 [2021-03-10 21:33:24,969 INFO L226 Difference]: Without dead ends: 1663 [2021-03-10 21:33:24,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-03-10 21:33:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1419. [2021-03-10 21:33:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.830042313117066) internal successors, (4013), 1418 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4013 transitions. [2021-03-10 21:33:24,983 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4013 transitions. Word has length 21 [2021-03-10 21:33:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:24,983 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4013 transitions. [2021-03-10 21:33:24,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4013 transitions. [2021-03-10 21:33:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:24,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:24,985 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:25,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16298 [2021-03-10 21:33:25,185 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1524213749, now seen corresponding path program 370 times [2021-03-10 21:33:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:25,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641799360] [2021-03-10 21:33:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:25,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641799360] [2021-03-10 21:33:25,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365907432] [2021-03-10 21:33:25,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:25,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:25,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:25,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:25,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:25,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:25,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991960493] [2021-03-10 21:33:25,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:25,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:25,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:25,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:25,309 INFO L87 Difference]: Start difference. First operand 1419 states and 4013 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:25,416 INFO L93 Difference]: Finished difference Result 1795 states and 4748 transitions. [2021-03-10 21:33:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:33:25,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:25,418 INFO L225 Difference]: With dead ends: 1795 [2021-03-10 21:33:25,418 INFO L226 Difference]: Without dead ends: 1795 [2021-03-10 21:33:25,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:33:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-03-10 21:33:25,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1431. [2021-03-10 21:33:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827972027972028) internal successors, (4044), 1430 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4044 transitions. [2021-03-10 21:33:25,433 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4044 transitions. Word has length 21 [2021-03-10 21:33:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:25,433 INFO L480 AbstractCegarLoop]: Abstraction has 1431 states and 4044 transitions. [2021-03-10 21:33:25,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4044 transitions. [2021-03-10 21:33:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:25,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:25,434 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:25,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16299,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:25,634 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:25,634 INFO L82 PathProgramCache]: Analyzing trace with hash 18584182, now seen corresponding path program 371 times [2021-03-10 21:33:25,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:25,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243097080] [2021-03-10 21:33:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243097080] [2021-03-10 21:33:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879173052] [2021-03-10 21:33:25,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:25,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:25,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:25,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:25,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:25,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764187613] [2021-03-10 21:33:25,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:25,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:25,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:25,774 INFO L87 Difference]: Start difference. First operand 1431 states and 4044 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:25,957 INFO L93 Difference]: Finished difference Result 1934 states and 5102 transitions. [2021-03-10 21:33:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:25,960 INFO L225 Difference]: With dead ends: 1934 [2021-03-10 21:33:25,960 INFO L226 Difference]: Without dead ends: 1920 [2021-03-10 21:33:25,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-03-10 21:33:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1431. [2021-03-10 21:33:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827272727272727) internal successors, (4043), 1430 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4043 transitions. [2021-03-10 21:33:25,975 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4043 transitions. Word has length 21 [2021-03-10 21:33:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:25,975 INFO L480 AbstractCegarLoop]: Abstraction has 1431 states and 4043 transitions. [2021-03-10 21:33:25,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4043 transitions. [2021-03-10 21:33:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:25,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:25,976 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:26,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16300 [2021-03-10 21:33:26,176 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash 429158389, now seen corresponding path program 372 times [2021-03-10 21:33:26,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:26,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365962482] [2021-03-10 21:33:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:26,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365962482] [2021-03-10 21:33:26,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195492139] [2021-03-10 21:33:26,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:26,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:26,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:26,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:26,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:26,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:26,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245505650] [2021-03-10 21:33:26,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:26,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:26,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:26,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:26,331 INFO L87 Difference]: Start difference. First operand 1431 states and 4043 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:26,572 INFO L93 Difference]: Finished difference Result 1818 states and 4976 transitions. [2021-03-10 21:33:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:26,575 INFO L225 Difference]: With dead ends: 1818 [2021-03-10 21:33:26,575 INFO L226 Difference]: Without dead ends: 1818 [2021-03-10 21:33:26,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-03-10 21:33:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1629. [2021-03-10 21:33:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.8316953316953315) internal successors, (4610), 1628 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 4610 transitions. [2021-03-10 21:33:26,591 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 4610 transitions. Word has length 21 [2021-03-10 21:33:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:26,591 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 4610 transitions. [2021-03-10 21:33:26,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 4610 transitions. [2021-03-10 21:33:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:26,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:26,592 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:26,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16301 [2021-03-10 21:33:26,793 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash 186543602, now seen corresponding path program 373 times [2021-03-10 21:33:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:26,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716343586] [2021-03-10 21:33:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:26,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716343586] [2021-03-10 21:33:26,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966234728] [2021-03-10 21:33:26,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:26,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:26,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:26,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521509940] [2021-03-10 21:33:26,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:26,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:26,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:26,906 INFO L87 Difference]: Start difference. First operand 1629 states and 4610 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:26,977 INFO L93 Difference]: Finished difference Result 2167 states and 5841 transitions. [2021-03-10 21:33:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:33:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:26,980 INFO L225 Difference]: With dead ends: 2167 [2021-03-10 21:33:26,980 INFO L226 Difference]: Without dead ends: 2167 [2021-03-10 21:33:26,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-03-10 21:33:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1854. [2021-03-10 21:33:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 2.870480302212628) internal successors, (5319), 1853 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 5319 transitions. [2021-03-10 21:33:26,998 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 5319 transitions. Word has length 21 [2021-03-10 21:33:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:26,998 INFO L480 AbstractCegarLoop]: Abstraction has 1854 states and 5319 transitions. [2021-03-10 21:33:26,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 5319 transitions. [2021-03-10 21:33:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:27,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:27,000 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:27,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16302 [2021-03-10 21:33:27,200 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash -590605997, now seen corresponding path program 374 times [2021-03-10 21:33:27,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:27,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386874522] [2021-03-10 21:33:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386874522] [2021-03-10 21:33:27,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719887768] [2021-03-10 21:33:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:27,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:27,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:27,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066650593] [2021-03-10 21:33:27,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:27,313 INFO L87 Difference]: Start difference. First operand 1854 states and 5319 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:27,486 INFO L93 Difference]: Finished difference Result 2069 states and 5690 transitions. [2021-03-10 21:33:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:27,488 INFO L225 Difference]: With dead ends: 2069 [2021-03-10 21:33:27,489 INFO L226 Difference]: Without dead ends: 2067 [2021-03-10 21:33:27,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-03-10 21:33:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1876. [2021-03-10 21:33:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8789333333333333) internal successors, (5398), 1875 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5398 transitions. [2021-03-10 21:33:27,507 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5398 transitions. Word has length 21 [2021-03-10 21:33:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:27,507 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5398 transitions. [2021-03-10 21:33:27,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5398 transitions. [2021-03-10 21:33:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:27,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:27,509 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:27,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16303,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:27,711 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1538935856, now seen corresponding path program 375 times [2021-03-10 21:33:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:27,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594620150] [2021-03-10 21:33:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594620150] [2021-03-10 21:33:27,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601897138] [2021-03-10 21:33:27,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:27,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:27,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:27,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:27,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770364213] [2021-03-10 21:33:27,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:27,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:27,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:27,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:27,833 INFO L87 Difference]: Start difference. First operand 1876 states and 5398 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:28,003 INFO L93 Difference]: Finished difference Result 2160 states and 5868 transitions. [2021-03-10 21:33:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:28,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:28,006 INFO L225 Difference]: With dead ends: 2160 [2021-03-10 21:33:28,006 INFO L226 Difference]: Without dead ends: 2158 [2021-03-10 21:33:28,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-03-10 21:33:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1876. [2021-03-10 21:33:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8784) internal successors, (5397), 1875 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5397 transitions. [2021-03-10 21:33:28,034 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5397 transitions. Word has length 21 [2021-03-10 21:33:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:28,034 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5397 transitions. [2021-03-10 21:33:28,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5397 transitions. [2021-03-10 21:33:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:28,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:28,036 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:28,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16304,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:28,239 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1120007311, now seen corresponding path program 376 times [2021-03-10 21:33:28,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:28,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281288197] [2021-03-10 21:33:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:28,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281288197] [2021-03-10 21:33:28,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003859962] [2021-03-10 21:33:28,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:28,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:28,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:28,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:28,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:28,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474417807] [2021-03-10 21:33:28,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:28,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:28,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:28,435 INFO L87 Difference]: Start difference. First operand 1876 states and 5397 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:28,570 INFO L93 Difference]: Finished difference Result 2164 states and 5944 transitions. [2021-03-10 21:33:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:33:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:28,574 INFO L225 Difference]: With dead ends: 2164 [2021-03-10 21:33:28,574 INFO L226 Difference]: Without dead ends: 2164 [2021-03-10 21:33:28,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-03-10 21:33:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1880. [2021-03-10 21:33:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.8786588610963277) internal successors, (5409), 1879 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5409 transitions. [2021-03-10 21:33:28,594 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5409 transitions. Word has length 21 [2021-03-10 21:33:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:28,594 INFO L480 AbstractCegarLoop]: Abstraction has 1880 states and 5409 transitions. [2021-03-10 21:33:28,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5409 transitions. [2021-03-10 21:33:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:28,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:28,596 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:28,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16305,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:28,796 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash -49530860, now seen corresponding path program 377 times [2021-03-10 21:33:28,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:28,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028457001] [2021-03-10 21:33:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028457001] [2021-03-10 21:33:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252872179] [2021-03-10 21:33:28,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:28,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:28,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:28,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:28,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:28,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:28,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:28,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999600851] [2021-03-10 21:33:28,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:28,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:28,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:28,907 INFO L87 Difference]: Start difference. First operand 1880 states and 5409 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:29,062 INFO L93 Difference]: Finished difference Result 2226 states and 6044 transitions. [2021-03-10 21:33:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:33:29,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:29,066 INFO L225 Difference]: With dead ends: 2226 [2021-03-10 21:33:29,066 INFO L226 Difference]: Without dead ends: 2222 [2021-03-10 21:33:29,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-03-10 21:33:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1880. [2021-03-10 21:33:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.87812666311868) internal successors, (5408), 1879 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5408 transitions. [2021-03-10 21:33:29,085 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5408 transitions. Word has length 21 [2021-03-10 21:33:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:29,085 INFO L480 AbstractCegarLoop]: Abstraction has 1880 states and 5408 transitions. [2021-03-10 21:33:29,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5408 transitions. [2021-03-10 21:33:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:29,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:29,087 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:29,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16306,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:29,288 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash -940852491, now seen corresponding path program 378 times [2021-03-10 21:33:29,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:29,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200212857] [2021-03-10 21:33:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:29,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200212857] [2021-03-10 21:33:29,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062138851] [2021-03-10 21:33:29,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:29,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:33:29,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:29,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:29,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:33:29,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151666207] [2021-03-10 21:33:29,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:33:29,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:29,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:33:29,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:33:29,417 INFO L87 Difference]: Start difference. First operand 1880 states and 5408 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:29,577 INFO L93 Difference]: Finished difference Result 2131 states and 5923 transitions. [2021-03-10 21:33:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:33:29,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:29,580 INFO L225 Difference]: With dead ends: 2131 [2021-03-10 21:33:29,580 INFO L226 Difference]: Without dead ends: 2131 [2021-03-10 21:33:29,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:33:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-03-10 21:33:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1896. [2021-03-10 21:33:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.880738786279683) internal successors, (5459), 1895 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 5459 transitions. [2021-03-10 21:33:29,599 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 5459 transitions. Word has length 21 [2021-03-10 21:33:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:29,599 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 5459 transitions. [2021-03-10 21:33:29,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 5459 transitions. [2021-03-10 21:33:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:29,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:29,601 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:29,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16307 [2021-03-10 21:33:29,801 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1122616240, now seen corresponding path program 379 times [2021-03-10 21:33:29,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:29,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782930584] [2021-03-10 21:33:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:29,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782930584] [2021-03-10 21:33:29,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812628492] [2021-03-10 21:33:29,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:29,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:29,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:33:29,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260749295] [2021-03-10 21:33:29,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:29,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:29,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:29,934 INFO L87 Difference]: Start difference. First operand 1896 states and 5459 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:30,105 INFO L93 Difference]: Finished difference Result 2262 states and 6134 transitions. [2021-03-10 21:33:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:30,108 INFO L225 Difference]: With dead ends: 2262 [2021-03-10 21:33:30,108 INFO L226 Difference]: Without dead ends: 2256 [2021-03-10 21:33:30,108 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:33:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-03-10 21:33:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1915. [2021-03-10 21:33:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.8876698014629048) internal successors, (5527), 1914 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5527 transitions. [2021-03-10 21:33:30,127 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5527 transitions. Word has length 21 [2021-03-10 21:33:30,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:30,127 INFO L480 AbstractCegarLoop]: Abstraction has 1915 states and 5527 transitions. [2021-03-10 21:33:30,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5527 transitions. [2021-03-10 21:33:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:30,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:30,128 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:30,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16308,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:30,329 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash -402996913, now seen corresponding path program 380 times [2021-03-10 21:33:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:30,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507802434] [2021-03-10 21:33:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:30,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507802434] [2021-03-10 21:33:30,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679463837] [2021-03-10 21:33:30,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:30,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:30,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:30,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:30,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:30,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:33:30,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561753648] [2021-03-10 21:33:30,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:30,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:30,463 INFO L87 Difference]: Start difference. First operand 1915 states and 5527 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:30,636 INFO L93 Difference]: Finished difference Result 2204 states and 6118 transitions. [2021-03-10 21:33:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:33:30,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:30,639 INFO L225 Difference]: With dead ends: 2204 [2021-03-10 21:33:30,639 INFO L226 Difference]: Without dead ends: 2202 [2021-03-10 21:33:30,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-03-10 21:33:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1917. [2021-03-10 21:33:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.887787056367432) internal successors, (5533), 1916 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 5533 transitions. [2021-03-10 21:33:30,657 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 5533 transitions. Word has length 21 [2021-03-10 21:33:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:30,657 INFO L480 AbstractCegarLoop]: Abstraction has 1917 states and 5533 transitions. [2021-03-10 21:33:30,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 5533 transitions. [2021-03-10 21:33:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:30,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:30,659 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:30,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16309,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:30,859 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:30,860 INFO L82 PathProgramCache]: Analyzing trace with hash -909343179, now seen corresponding path program 381 times [2021-03-10 21:33:30,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:30,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874020598] [2021-03-10 21:33:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:30,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874020598] [2021-03-10 21:33:30,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441293789] [2021-03-10 21:33:30,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:30,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:30,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:31,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:31,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:33:31,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604442301] [2021-03-10 21:33:31,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:31,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:31,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:31,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:31,007 INFO L87 Difference]: Start difference. First operand 1917 states and 5533 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:31,193 INFO L93 Difference]: Finished difference Result 2248 states and 6327 transitions. [2021-03-10 21:33:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:33:31,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:31,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:31,197 INFO L225 Difference]: With dead ends: 2248 [2021-03-10 21:33:31,197 INFO L226 Difference]: Without dead ends: 2248 [2021-03-10 21:33:31,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-03-10 21:33:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2054. [2021-03-10 21:33:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.895762299074525) internal successors, (5945), 2053 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5945 transitions. [2021-03-10 21:33:31,216 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5945 transitions. Word has length 21 [2021-03-10 21:33:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:31,216 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 5945 transitions. [2021-03-10 21:33:31,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5945 transitions. [2021-03-10 21:33:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:31,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:31,218 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:31,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16310 [2021-03-10 21:33:31,418 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:31,418 INFO L82 PathProgramCache]: Analyzing trace with hash -471423792, now seen corresponding path program 382 times [2021-03-10 21:33:31,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:31,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743909113] [2021-03-10 21:33:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:31,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743909113] [2021-03-10 21:33:31,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463978887] [2021-03-10 21:33:31,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:31,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:31,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:31,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:31,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:31,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919603467] [2021-03-10 21:33:31,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:31,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:31,558 INFO L87 Difference]: Start difference. First operand 2054 states and 5945 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:31,748 INFO L93 Difference]: Finished difference Result 2927 states and 7947 transitions. [2021-03-10 21:33:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:31,752 INFO L225 Difference]: With dead ends: 2927 [2021-03-10 21:33:31,752 INFO L226 Difference]: Without dead ends: 2917 [2021-03-10 21:33:31,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-03-10 21:33:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2066. [2021-03-10 21:33:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8949152542372882) internal successors, (5978), 2065 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5978 transitions. [2021-03-10 21:33:31,775 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5978 transitions. Word has length 21 [2021-03-10 21:33:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:31,775 INFO L480 AbstractCegarLoop]: Abstraction has 2066 states and 5978 transitions. [2021-03-10 21:33:31,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5978 transitions. [2021-03-10 21:33:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:31,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:31,777 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:31,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16311 [2021-03-10 21:33:31,977 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash 573791759, now seen corresponding path program 383 times [2021-03-10 21:33:31,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:31,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181306788] [2021-03-10 21:33:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:32,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181306788] [2021-03-10 21:33:32,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482843083] [2021-03-10 21:33:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:32,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:33:32,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:32,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:32,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:32,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:32,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715493229] [2021-03-10 21:33:32,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:32,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:32,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:32,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:32,114 INFO L87 Difference]: Start difference. First operand 2066 states and 5978 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:32,303 INFO L93 Difference]: Finished difference Result 2220 states and 6263 transitions. [2021-03-10 21:33:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:33:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:32,306 INFO L225 Difference]: With dead ends: 2220 [2021-03-10 21:33:32,306 INFO L226 Difference]: Without dead ends: 2214 [2021-03-10 21:33:32,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-03-10 21:33:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2055. [2021-03-10 21:33:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8938656280428434) internal successors, (5944), 2054 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5944 transitions. [2021-03-10 21:33:32,326 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5944 transitions. Word has length 21 [2021-03-10 21:33:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:32,326 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5944 transitions. [2021-03-10 21:33:32,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5944 transitions. [2021-03-10 21:33:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:32,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:32,328 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:32,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16312 [2021-03-10 21:33:32,529 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -693665419, now seen corresponding path program 384 times [2021-03-10 21:33:32,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:32,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622157707] [2021-03-10 21:33:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:32,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622157707] [2021-03-10 21:33:32,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940890642] [2021-03-10 21:33:32,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:32,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:32,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:32,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:32,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:32,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:32,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:33:32,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134787435] [2021-03-10 21:33:32,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:33:32,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:33:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:33:32,677 INFO L87 Difference]: Start difference. First operand 2055 states and 5944 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:32,815 INFO L93 Difference]: Finished difference Result 2405 states and 6839 transitions. [2021-03-10 21:33:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:33:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:32,818 INFO L225 Difference]: With dead ends: 2405 [2021-03-10 21:33:32,818 INFO L226 Difference]: Without dead ends: 2405 [2021-03-10 21:33:32,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:33:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-03-10 21:33:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2231. [2021-03-10 21:33:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.8937219730941703) internal successors, (6453), 2230 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6453 transitions. [2021-03-10 21:33:32,839 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6453 transitions. Word has length 21 [2021-03-10 21:33:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:32,839 INFO L480 AbstractCegarLoop]: Abstraction has 2231 states and 6453 transitions. [2021-03-10 21:33:32,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6453 transitions. [2021-03-10 21:33:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:32,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:32,841 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:33,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16313 [2021-03-10 21:33:33,041 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1740706480, now seen corresponding path program 385 times [2021-03-10 21:33:33,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:33,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933415772] [2021-03-10 21:33:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:33,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933415772] [2021-03-10 21:33:33,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035731196] [2021-03-10 21:33:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:33,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:33,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:33,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:33,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028293843] [2021-03-10 21:33:33,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:33,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:33,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:33,191 INFO L87 Difference]: Start difference. First operand 2231 states and 6453 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:33,393 INFO L93 Difference]: Finished difference Result 3084 states and 8355 transitions. [2021-03-10 21:33:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:33:33,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:33,397 INFO L225 Difference]: With dead ends: 3084 [2021-03-10 21:33:33,397 INFO L226 Difference]: Without dead ends: 3070 [2021-03-10 21:33:33,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-03-10 21:33:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2241. [2021-03-10 21:33:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8924107142857145) internal successors, (6479), 2240 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6479 transitions. [2021-03-10 21:33:33,421 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6479 transitions. Word has length 21 [2021-03-10 21:33:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:33,421 INFO L480 AbstractCegarLoop]: Abstraction has 2241 states and 6479 transitions. [2021-03-10 21:33:33,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6479 transitions. [2021-03-10 21:33:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:33,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:33,423 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:33,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16314,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:33,624 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1330132273, now seen corresponding path program 386 times [2021-03-10 21:33:33,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:33,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031796311] [2021-03-10 21:33:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:33,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031796311] [2021-03-10 21:33:33,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668092689] [2021-03-10 21:33:33,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:33,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:33,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:33,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:33,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:33,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137696253] [2021-03-10 21:33:33,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:33,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:33,787 INFO L87 Difference]: Start difference. First operand 2241 states and 6479 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:33,983 INFO L93 Difference]: Finished difference Result 2484 states and 7025 transitions. [2021-03-10 21:33:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:33:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:33,986 INFO L225 Difference]: With dead ends: 2484 [2021-03-10 21:33:33,986 INFO L226 Difference]: Without dead ends: 2484 [2021-03-10 21:33:33,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:33:33,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-03-10 21:33:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2245. [2021-03-10 21:33:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 2.892602495543672) internal successors, (6491), 2244 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 6491 transitions. [2021-03-10 21:33:34,007 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 6491 transitions. Word has length 21 [2021-03-10 21:33:34,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:34,007 INFO L480 AbstractCegarLoop]: Abstraction has 2245 states and 6491 transitions. [2021-03-10 21:33:34,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 6491 transitions. [2021-03-10 21:33:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:34,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:34,009 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:34,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16315,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:34,210 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:34,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2009452908, now seen corresponding path program 387 times [2021-03-10 21:33:34,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:34,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699919995] [2021-03-10 21:33:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:34,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699919995] [2021-03-10 21:33:34,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066164724] [2021-03-10 21:33:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:34,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:34,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:34,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:34,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:34,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:34,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:34,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172299275] [2021-03-10 21:33:34,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:34,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:34,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:34,374 INFO L87 Difference]: Start difference. First operand 2245 states and 6491 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:34,468 INFO L93 Difference]: Finished difference Result 2777 states and 7639 transitions. [2021-03-10 21:33:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:33:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:34,472 INFO L225 Difference]: With dead ends: 2777 [2021-03-10 21:33:34,472 INFO L226 Difference]: Without dead ends: 2761 [2021-03-10 21:33:34,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-03-10 21:33:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2243. [2021-03-10 21:33:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 2.893398751115076) internal successors, (6487), 2242 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 6487 transitions. [2021-03-10 21:33:34,494 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 6487 transitions. Word has length 21 [2021-03-10 21:33:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:34,494 INFO L480 AbstractCegarLoop]: Abstraction has 2243 states and 6487 transitions. [2021-03-10 21:33:34,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 6487 transitions. [2021-03-10 21:33:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:33:34,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:34,496 INFO L519 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:34,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16316,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:34,696 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash 414231733, now seen corresponding path program 388 times [2021-03-10 21:33:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:34,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924868131] [2021-03-10 21:33:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924868131] [2021-03-10 21:33:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442010755] [2021-03-10 21:33:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:34,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:34,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:33:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:34,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:34,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:33:34,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421474906] [2021-03-10 21:33:34,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:34,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:34,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:34,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:34,878 INFO L87 Difference]: Start difference. First operand 2243 states and 6487 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:35,162 INFO L93 Difference]: Finished difference Result 2725 states and 7700 transitions. [2021-03-10 21:33:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:35,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:33:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:35,166 INFO L225 Difference]: With dead ends: 2725 [2021-03-10 21:33:35,166 INFO L226 Difference]: Without dead ends: 2725 [2021-03-10 21:33:35,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:33:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-03-10 21:33:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2301. [2021-03-10 21:33:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.893478260869565) internal successors, (6655), 2300 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6655 transitions. [2021-03-10 21:33:35,189 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6655 transitions. Word has length 21 [2021-03-10 21:33:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:35,189 INFO L480 AbstractCegarLoop]: Abstraction has 2301 states and 6655 transitions. [2021-03-10 21:33:35,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6655 transitions. [2021-03-10 21:33:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:35,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:35,191 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:35,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16317,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:35,391 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:35,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1134083623, now seen corresponding path program 389 times [2021-03-10 21:33:35,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:35,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917367904] [2021-03-10 21:33:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917367904] [2021-03-10 21:33:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036554502] [2021-03-10 21:33:35,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:35,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:35,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:35,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:36,211 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:36,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:36,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:39,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:39,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:39,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:39,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:33:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:39,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:39,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:33:39,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795011936] [2021-03-10 21:33:39,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:33:39,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:39,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:33:39,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:33:39,348 INFO L87 Difference]: Start difference. First operand 2301 states and 6655 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:39,944 INFO L93 Difference]: Finished difference Result 2401 states and 6850 transitions. [2021-03-10 21:33:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:33:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:33:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:39,947 INFO L225 Difference]: With dead ends: 2401 [2021-03-10 21:33:39,947 INFO L226 Difference]: Without dead ends: 2362 [2021-03-10 21:33:39,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 792.6ms TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:33:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-03-10 21:33:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2321. [2021-03-10 21:33:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 2.8922413793103448) internal successors, (6710), 2320 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 6710 transitions. [2021-03-10 21:33:39,969 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 6710 transitions. Word has length 22 [2021-03-10 21:33:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:39,970 INFO L480 AbstractCegarLoop]: Abstraction has 2321 states and 6710 transitions. [2021-03-10 21:33:39,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 6710 transitions. [2021-03-10 21:33:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:39,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:39,971 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:40,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16318,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:40,172 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1610689749, now seen corresponding path program 390 times [2021-03-10 21:33:40,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:40,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113417519] [2021-03-10 21:33:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113417519] [2021-03-10 21:33:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557193913] [2021-03-10 21:33:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:40,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:40,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:40,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:40,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:40,911 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:40,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:40,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:41,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:41,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:41,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:41,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:33:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:41,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:41,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:33:41,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253255064] [2021-03-10 21:33:41,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:33:41,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:41,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:33:41,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:41,604 INFO L87 Difference]: Start difference. First operand 2321 states and 6710 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:42,076 INFO L93 Difference]: Finished difference Result 2430 states and 6936 transitions. [2021-03-10 21:33:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:33:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:33:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:42,079 INFO L225 Difference]: With dead ends: 2430 [2021-03-10 21:33:42,079 INFO L226 Difference]: Without dead ends: 2414 [2021-03-10 21:33:42,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:33:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-03-10 21:33:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2342. [2021-03-10 21:33:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-03-10 21:33:42,101 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-03-10 21:33:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:42,101 INFO L480 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-03-10 21:33:42,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-03-10 21:33:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:42,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:42,103 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:42,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17475,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:42,303 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash -751815219, now seen corresponding path program 391 times [2021-03-10 21:33:42,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:42,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875053898] [2021-03-10 21:33:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:42,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875053898] [2021-03-10 21:33:42,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702001211] [2021-03-10 21:33:42,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:42,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:42,971 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:42,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:42,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:43,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:43,729 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:43,730 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:43,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:33:44,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:44,916 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:33:44,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:44,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:33:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:44,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:44,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:33:44,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340228044] [2021-03-10 21:33:44,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:33:44,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:44,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:33:44,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:44,961 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:45,703 INFO L93 Difference]: Finished difference Result 2452 states and 6986 transitions. [2021-03-10 21:33:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:33:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:33:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:45,707 INFO L225 Difference]: With dead ends: 2452 [2021-03-10 21:33:45,707 INFO L226 Difference]: Without dead ends: 2442 [2021-03-10 21:33:45,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:33:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-03-10 21:33:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2342. [2021-03-10 21:33:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-03-10 21:33:45,729 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-03-10 21:33:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:45,729 INFO L480 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-03-10 21:33:45,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-03-10 21:33:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:45,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:45,731 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:45,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17730 [2021-03-10 21:33:45,931 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1241823813, now seen corresponding path program 392 times [2021-03-10 21:33:45,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:45,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853106813] [2021-03-10 21:33:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:46,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853106813] [2021-03-10 21:33:46,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409136749] [2021-03-10 21:33:46,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:46,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:46,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:46,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:46,624 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:46,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:46,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:47,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:47,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:47,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:47,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:33:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:47,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:47,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:33:47,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221189269] [2021-03-10 21:33:47,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:33:47,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:33:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:47,838 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:48,487 INFO L93 Difference]: Finished difference Result 2475 states and 7097 transitions. [2021-03-10 21:33:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:33:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:33:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:48,490 INFO L225 Difference]: With dead ends: 2475 [2021-03-10 21:33:48,490 INFO L226 Difference]: Without dead ends: 2459 [2021-03-10 21:33:48,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:33:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-03-10 21:33:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2381. [2021-03-10 21:33:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9063025210084033) internal successors, (6917), 2380 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6917 transitions. [2021-03-10 21:33:48,513 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6917 transitions. Word has length 22 [2021-03-10 21:33:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:48,513 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6917 transitions. [2021-03-10 21:33:48,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6917 transitions. [2021-03-10 21:33:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:48,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:48,515 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:48,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18332 [2021-03-10 21:33:48,715 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash -382949283, now seen corresponding path program 393 times [2021-03-10 21:33:48,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:48,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584206856] [2021-03-10 21:33:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:48,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584206856] [2021-03-10 21:33:48,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490707508] [2021-03-10 21:33:48,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:48,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:48,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:49,382 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:49,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:49,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:50,315 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:50,316 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:50,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:33:51,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:51,351 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:33:51,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:51,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:33:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:51,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:51,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:33:51,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706487195] [2021-03-10 21:33:51,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:33:51,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:51,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:33:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:51,397 INFO L87 Difference]: Start difference. First operand 2381 states and 6917 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:51,949 INFO L93 Difference]: Finished difference Result 2516 states and 7177 transitions. [2021-03-10 21:33:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:33:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:33:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:51,952 INFO L225 Difference]: With dead ends: 2516 [2021-03-10 21:33:51,952 INFO L226 Difference]: Without dead ends: 2497 [2021-03-10 21:33:51,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:33:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-03-10 21:33:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2379. [2021-03-10 21:33:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 2.904541631623213) internal successors, (6907), 2378 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 6907 transitions. [2021-03-10 21:33:51,973 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 6907 transitions. Word has length 22 [2021-03-10 21:33:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:51,973 INFO L480 AbstractCegarLoop]: Abstraction has 2379 states and 6907 transitions. [2021-03-10 21:33:51,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:51,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 6907 transitions. [2021-03-10 21:33:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:51,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:51,975 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:52,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18824,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:52,175 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1327664025, now seen corresponding path program 394 times [2021-03-10 21:33:52,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:52,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802586269] [2021-03-10 21:33:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802586269] [2021-03-10 21:33:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557140537] [2021-03-10 21:33:52,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:52,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:52,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:52,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:52,875 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:52,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:52,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:53,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:53,554 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:53,555 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:53,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:33:54,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:54,289 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:33:54,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:54,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:33:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:54,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:54,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:33:54,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615990105] [2021-03-10 21:33:54,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:33:54,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:54,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:33:54,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:54,327 INFO L87 Difference]: Start difference. First operand 2379 states and 6907 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:55,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:55,077 INFO L93 Difference]: Finished difference Result 2452 states and 7057 transitions. [2021-03-10 21:33:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:33:55,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:33:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:55,080 INFO L225 Difference]: With dead ends: 2452 [2021-03-10 21:33:55,080 INFO L226 Difference]: Without dead ends: 2442 [2021-03-10 21:33:55,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:33:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-03-10 21:33:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2381. [2021-03-10 21:33:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9046218487394957) internal successors, (6913), 2380 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6913 transitions. [2021-03-10 21:33:55,102 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6913 transitions. Word has length 22 [2021-03-10 21:33:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:55,102 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6913 transitions. [2021-03-10 21:33:55,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6913 transitions. [2021-03-10 21:33:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:55,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:55,104 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:55,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19351 [2021-03-10 21:33:55,305 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:55,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1415476527, now seen corresponding path program 395 times [2021-03-10 21:33:55,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:55,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114389903] [2021-03-10 21:33:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:33:55,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114389903] [2021-03-10 21:33:55,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017027519] [2021-03-10 21:33:55,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:55,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:55,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:55,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:56,003 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:56,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:56,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:56,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:56,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:56,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:56,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:33:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:56,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:56,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-10 21:33:56,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817232597] [2021-03-10 21:33:56,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:33:56,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:33:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:33:56,789 INFO L87 Difference]: Start difference. First operand 2381 states and 6913 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:57,207 INFO L93 Difference]: Finished difference Result 2422 states and 6975 transitions. [2021-03-10 21:33:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:33:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:57,211 INFO L225 Difference]: With dead ends: 2422 [2021-03-10 21:33:57,211 INFO L226 Difference]: Without dead ends: 2404 [2021-03-10 21:33:57,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:33:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-03-10 21:33:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-03-10 21:33:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.903781512605042) internal successors, (6911), 2380 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6911 transitions. [2021-03-10 21:33:57,232 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6911 transitions. Word has length 22 [2021-03-10 21:33:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:57,232 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6911 transitions. [2021-03-10 21:33:57,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6911 transitions. [2021-03-10 21:33:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:33:57,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:57,234 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:57,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19737,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:57,434 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash -660249425, now seen corresponding path program 396 times [2021-03-10 21:33:57,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:57,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712480910] [2021-03-10 21:33:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712480910] [2021-03-10 21:33:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591588012] [2021-03-10 21:33:57,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:57,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:57,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:57,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:33:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:58,141 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:58,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:58,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:58,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:59,178 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:59,178 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:59,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:00,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:00,841 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:00,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:00,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:00,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:00,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:34:00,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295880080] [2021-03-10 21:34:00,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:34:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:34:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:00,879 INFO L87 Difference]: Start difference. First operand 2381 states and 6911 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:01,714 INFO L93 Difference]: Finished difference Result 2517 states and 7175 transitions. [2021-03-10 21:34:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:34:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:01,717 INFO L225 Difference]: With dead ends: 2517 [2021-03-10 21:34:01,717 INFO L226 Difference]: Without dead ends: 2507 [2021-03-10 21:34:01,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 636.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:34:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-03-10 21:34:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2380. [2021-03-10 21:34:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.903741067675494) internal successors, (6908), 2379 states have internal predecessors, (6908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6908 transitions. [2021-03-10 21:34:01,740 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6908 transitions. Word has length 22 [2021-03-10 21:34:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:01,740 INFO L480 AbstractCegarLoop]: Abstraction has 2380 states and 6908 transitions. [2021-03-10 21:34:01,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6908 transitions. [2021-03-10 21:34:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:01,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:01,742 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:01,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20026 [2021-03-10 21:34:01,942 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:01,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1603085611, now seen corresponding path program 397 times [2021-03-10 21:34:01,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:01,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825301315] [2021-03-10 21:34:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:02,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825301315] [2021-03-10 21:34:02,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528695720] [2021-03-10 21:34:02,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:02,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:02,673 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:02,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:04,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:04,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:04,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:04,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:04,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:04,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:34:04,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82194940] [2021-03-10 21:34:04,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:34:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:34:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:04,920 INFO L87 Difference]: Start difference. First operand 2380 states and 6908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:05,405 INFO L93 Difference]: Finished difference Result 2527 states and 7269 transitions. [2021-03-10 21:34:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:34:05,406 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:05,408 INFO L225 Difference]: With dead ends: 2527 [2021-03-10 21:34:05,408 INFO L226 Difference]: Without dead ends: 2509 [2021-03-10 21:34:05,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:34:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-03-10 21:34:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2429. [2021-03-10 21:34:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 2.915156507413509) internal successors, (7078), 2428 states have internal predecessors, (7078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7078 transitions. [2021-03-10 21:34:05,430 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7078 transitions. Word has length 22 [2021-03-10 21:34:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:05,430 INFO L480 AbstractCegarLoop]: Abstraction has 2429 states and 7078 transitions. [2021-03-10 21:34:05,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7078 transitions. [2021-03-10 21:34:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:05,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:05,432 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:05,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20714,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:05,633 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1833007155, now seen corresponding path program 398 times [2021-03-10 21:34:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:05,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037775748] [2021-03-10 21:34:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:05,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037775748] [2021-03-10 21:34:05,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131255097] [2021-03-10 21:34:05,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:05,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:05,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:05,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:06,266 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:06,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:07,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:07,376 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:07,377 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:07,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:07,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:07,916 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:07,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:07,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:07,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:07,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:34:07,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459709457] [2021-03-10 21:34:07,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:34:07,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:07,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:34:07,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:07,954 INFO L87 Difference]: Start difference. First operand 2429 states and 7078 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:08,746 INFO L93 Difference]: Finished difference Result 2609 states and 7439 transitions. [2021-03-10 21:34:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:34:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:08,750 INFO L225 Difference]: With dead ends: 2609 [2021-03-10 21:34:08,750 INFO L226 Difference]: Without dead ends: 2583 [2021-03-10 21:34:08,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 684.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:34:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-03-10 21:34:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2431. [2021-03-10 21:34:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2430 states have (on average 2.914814814814815) internal successors, (7083), 2430 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 7083 transitions. [2021-03-10 21:34:08,771 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 7083 transitions. Word has length 22 [2021-03-10 21:34:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:08,771 INFO L480 AbstractCegarLoop]: Abstraction has 2431 states and 7083 transitions. [2021-03-10 21:34:08,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 7083 transitions. [2021-03-10 21:34:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:08,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:08,773 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:08,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21574,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:08,974 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash -122393847, now seen corresponding path program 399 times [2021-03-10 21:34:08,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:08,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86065665] [2021-03-10 21:34:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:09,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86065665] [2021-03-10 21:34:09,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356146142] [2021-03-10 21:34:09,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:09,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:34:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:09,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:09,611 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:09,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:09,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:11,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:11,660 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:11,660 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:11,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:14,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:14,078 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:14,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:14,078 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:14,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:14,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:34:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740694114] [2021-03-10 21:34:14,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:34:14,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:14,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:34:14,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:14,116 INFO L87 Difference]: Start difference. First operand 2431 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:15,113 INFO L93 Difference]: Finished difference Result 2675 states and 7586 transitions. [2021-03-10 21:34:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:34:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:15,117 INFO L225 Difference]: With dead ends: 2675 [2021-03-10 21:34:15,117 INFO L226 Difference]: Without dead ends: 2642 [2021-03-10 21:34:15,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 719.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:34:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-03-10 21:34:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2423. [2021-03-10 21:34:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.911643270024773) internal successors, (7052), 2422 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 7052 transitions. [2021-03-10 21:34:15,140 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 7052 transitions. Word has length 22 [2021-03-10 21:34:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:15,140 INFO L480 AbstractCegarLoop]: Abstraction has 2423 states and 7052 transitions. [2021-03-10 21:34:15,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 7052 transitions. [2021-03-10 21:34:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:15,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:15,142 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:15,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22059 [2021-03-10 21:34:15,343 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:15,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1367011149, now seen corresponding path program 400 times [2021-03-10 21:34:15,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:15,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634632975] [2021-03-10 21:34:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:15,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634632975] [2021-03-10 21:34:15,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662486270] [2021-03-10 21:34:15,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:15,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:15,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:15,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:16,058 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:16,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:16,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:17,197 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:17,197 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:18,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:18,070 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:18,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:18,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:18,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:18,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:34:18,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284840688] [2021-03-10 21:34:18,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:34:18,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:34:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:18,109 INFO L87 Difference]: Start difference. First operand 2423 states and 7052 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:18,848 INFO L93 Difference]: Finished difference Result 2564 states and 7348 transitions. [2021-03-10 21:34:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:34:18,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:18,852 INFO L225 Difference]: With dead ends: 2564 [2021-03-10 21:34:18,852 INFO L226 Difference]: Without dead ends: 2554 [2021-03-10 21:34:18,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 736.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:34:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-03-10 21:34:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2425. [2021-03-10 21:34:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.9117161716171616) internal successors, (7058), 2424 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7058 transitions. [2021-03-10 21:34:18,875 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7058 transitions. Word has length 22 [2021-03-10 21:34:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:18,875 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7058 transitions. [2021-03-10 21:34:18,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7058 transitions. [2021-03-10 21:34:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:18,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:18,877 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:19,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23375,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:19,077 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:19,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash -80298279, now seen corresponding path program 401 times [2021-03-10 21:34:19,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:19,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48114207] [2021-03-10 21:34:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:34:19,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48114207] [2021-03-10 21:34:19,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608414149] [2021-03-10 21:34:19,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:19,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:34:19,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:19,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:19,757 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:19,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:20,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:20,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:20,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:20,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:20,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:20,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-10 21:34:20,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396589462] [2021-03-10 21:34:20,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:34:20,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:34:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:34:20,445 INFO L87 Difference]: Start difference. First operand 2425 states and 7058 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:20,921 INFO L93 Difference]: Finished difference Result 2464 states and 7117 transitions. [2021-03-10 21:34:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:34:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:20,924 INFO L225 Difference]: With dead ends: 2464 [2021-03-10 21:34:20,924 INFO L226 Difference]: Without dead ends: 2446 [2021-03-10 21:34:20,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-03-10 21:34:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2425. [2021-03-10 21:34:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.911303630363036) internal successors, (7057), 2424 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7057 transitions. [2021-03-10 21:34:20,945 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7057 transitions. Word has length 22 [2021-03-10 21:34:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:20,945 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7057 transitions. [2021-03-10 21:34:20,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7057 transitions. [2021-03-10 21:34:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:20,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:20,947 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:21,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23955 [2021-03-10 21:34:21,147 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash -128763657, now seen corresponding path program 402 times [2021-03-10 21:34:21,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:21,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612609445] [2021-03-10 21:34:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:21,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612609445] [2021-03-10 21:34:21,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847587734] [2021-03-10 21:34:21,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:21,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:34:21,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:21,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:21,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:21,791 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:21,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:21,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:23,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:23,867 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:23,868 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:23,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:25,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:25,032 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:25,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:25,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:25,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:25,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:34:25,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724226012] [2021-03-10 21:34:25,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:34:25,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:34:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:25,073 INFO L87 Difference]: Start difference. First operand 2425 states and 7057 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:25,805 INFO L93 Difference]: Finished difference Result 2669 states and 7612 transitions. [2021-03-10 21:34:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:34:25,805 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:25,808 INFO L225 Difference]: With dead ends: 2669 [2021-03-10 21:34:25,808 INFO L226 Difference]: Without dead ends: 2659 [2021-03-10 21:34:25,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:34:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-03-10 21:34:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2426. [2021-03-10 21:34:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2425 states have (on average 2.9117525773195876) internal successors, (7061), 2425 states have internal predecessors, (7061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 7061 transitions. [2021-03-10 21:34:25,831 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 7061 transitions. Word has length 22 [2021-03-10 21:34:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:25,831 INFO L480 AbstractCegarLoop]: Abstraction has 2426 states and 7061 transitions. [2021-03-10 21:34:25,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 7061 transitions. [2021-03-10 21:34:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:25,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:25,834 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:26,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24215 [2021-03-10 21:34:26,034 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash -399035461, now seen corresponding path program 403 times [2021-03-10 21:34:26,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:26,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513037594] [2021-03-10 21:34:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:26,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513037594] [2021-03-10 21:34:26,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134812568] [2021-03-10 21:34:26,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:26,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:26,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:26,702 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:26,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:26,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:27,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:27,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:27,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:27,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:27,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:27,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:34:27,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636790150] [2021-03-10 21:34:27,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:34:27,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:27,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:34:27,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:27,306 INFO L87 Difference]: Start difference. First operand 2426 states and 7061 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:28,040 INFO L93 Difference]: Finished difference Result 2557 states and 7399 transitions. [2021-03-10 21:34:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:34:28,041 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:28,044 INFO L225 Difference]: With dead ends: 2557 [2021-03-10 21:34:28,044 INFO L226 Difference]: Without dead ends: 2541 [2021-03-10 21:34:28,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:34:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-03-10 21:34:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2477. [2021-03-10 21:34:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.9232633279483036) internal successors, (7238), 2476 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7238 transitions. [2021-03-10 21:34:28,068 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7238 transitions. Word has length 22 [2021-03-10 21:34:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:28,068 INFO L480 AbstractCegarLoop]: Abstraction has 2477 states and 7238 transitions. [2021-03-10 21:34:28,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7238 transitions. [2021-03-10 21:34:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:28,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:28,070 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:28,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25242,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:28,270 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:28,271 INFO L82 PathProgramCache]: Analyzing trace with hash 459839069, now seen corresponding path program 404 times [2021-03-10 21:34:28,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:28,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425679526] [2021-03-10 21:34:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:28,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425679526] [2021-03-10 21:34:28,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605423832] [2021-03-10 21:34:28,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:28,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:28,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:28,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:28,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:28,966 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:28,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:28,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:30,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:30,389 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:30,390 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:30,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:30,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:31,012 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:31,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:31,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:31,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:31,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:34:31,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35969893] [2021-03-10 21:34:31,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:34:31,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:34:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:31,052 INFO L87 Difference]: Start difference. First operand 2477 states and 7238 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:32,399 INFO L93 Difference]: Finished difference Result 2676 states and 7671 transitions. [2021-03-10 21:34:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:34:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:32,402 INFO L225 Difference]: With dead ends: 2676 [2021-03-10 21:34:32,402 INFO L226 Difference]: Without dead ends: 2650 [2021-03-10 21:34:32,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:34:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-03-10 21:34:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2483. [2021-03-10 21:34:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.9234488315874296) internal successors, (7256), 2482 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7256 transitions. [2021-03-10 21:34:32,426 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7256 transitions. Word has length 22 [2021-03-10 21:34:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:32,427 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 7256 transitions. [2021-03-10 21:34:32,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7256 transitions. [2021-03-10 21:34:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:32,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:32,429 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:32,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25480,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:32,629 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2124514919, now seen corresponding path program 405 times [2021-03-10 21:34:32,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:32,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077192520] [2021-03-10 21:34:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:32,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077192520] [2021-03-10 21:34:32,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96906357] [2021-03-10 21:34:32,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:32,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:34:32,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:32,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:32,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:33,355 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:33,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:33,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:34,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:34,926 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:34,926 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:34,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:37,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:37,262 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:37,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:37,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:37,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:37,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:34:37,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728824381] [2021-03-10 21:34:37,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:34:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:34:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:37,305 INFO L87 Difference]: Start difference. First operand 2483 states and 7256 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:38,111 INFO L93 Difference]: Finished difference Result 2619 states and 7552 transitions. [2021-03-10 21:34:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:34:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:38,114 INFO L225 Difference]: With dead ends: 2619 [2021-03-10 21:34:38,114 INFO L226 Difference]: Without dead ends: 2609 [2021-03-10 21:34:38,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:34:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-03-10 21:34:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2498. [2021-03-10 21:34:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.924309171005206) internal successors, (7302), 2497 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 7302 transitions. [2021-03-10 21:34:38,137 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 7302 transitions. Word has length 22 [2021-03-10 21:34:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:38,137 INFO L480 AbstractCegarLoop]: Abstraction has 2498 states and 7302 transitions. [2021-03-10 21:34:38,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 7302 transitions. [2021-03-10 21:34:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:38,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:38,139 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:38,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26088 [2021-03-10 21:34:38,340 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash -635109923, now seen corresponding path program 406 times [2021-03-10 21:34:38,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:38,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992191613] [2021-03-10 21:34:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:38,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992191613] [2021-03-10 21:34:38,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283139335] [2021-03-10 21:34:38,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:38,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:38,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:38,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:39,077 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:39,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:39,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:39,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:39,874 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:39,875 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:39,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:40,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:40,416 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:40,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:40,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:40,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:40,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:34:40,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394349750] [2021-03-10 21:34:40,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:34:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:34:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:40,462 INFO L87 Difference]: Start difference. First operand 2498 states and 7302 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:41,535 INFO L93 Difference]: Finished difference Result 2729 states and 7824 transitions. [2021-03-10 21:34:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:34:41,535 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:41,539 INFO L225 Difference]: With dead ends: 2729 [2021-03-10 21:34:41,539 INFO L226 Difference]: Without dead ends: 2700 [2021-03-10 21:34:41,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 928.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:34:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-03-10 21:34:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2493. [2021-03-10 21:34:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.923354735152488) internal successors, (7285), 2492 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7285 transitions. [2021-03-10 21:34:41,563 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7285 transitions. Word has length 22 [2021-03-10 21:34:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:41,563 INFO L480 AbstractCegarLoop]: Abstraction has 2493 states and 7285 transitions. [2021-03-10 21:34:41,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7285 transitions. [2021-03-10 21:34:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:41,565 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:41,565 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:41,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27310,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:41,766 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:41,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1708195303, now seen corresponding path program 407 times [2021-03-10 21:34:41,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:41,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870900216] [2021-03-10 21:34:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870900216] [2021-03-10 21:34:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940827] [2021-03-10 21:34:41,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:41,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:34:41,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:41,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:42,543 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:42,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:42,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:43,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:43,690 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:43,691 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:43,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:46,360 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1751 DAG size of output: 1209 [2021-03-10 21:34:46,472 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1751 DAG size of output: 1209 [2021-03-10 21:34:46,591 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1757 DAG size of output: 1215 [2021-03-10 21:34:47,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:47,333 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:47,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:47,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:47,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:47,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:34:47,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21472757] [2021-03-10 21:34:47,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:34:47,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:47,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:34:47,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:47,391 INFO L87 Difference]: Start difference. First operand 2493 states and 7285 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:48,080 INFO L93 Difference]: Finished difference Result 2656 states and 7653 transitions. [2021-03-10 21:34:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:34:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:48,084 INFO L225 Difference]: With dead ends: 2656 [2021-03-10 21:34:48,084 INFO L226 Difference]: Without dead ends: 2646 [2021-03-10 21:34:48,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:34:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-03-10 21:34:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2494. [2021-03-10 21:34:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 2.923385479342158) internal successors, (7288), 2493 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 7288 transitions. [2021-03-10 21:34:48,108 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 7288 transitions. Word has length 22 [2021-03-10 21:34:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:48,108 INFO L480 AbstractCegarLoop]: Abstraction has 2494 states and 7288 transitions. [2021-03-10 21:34:48,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 7288 transitions. [2021-03-10 21:34:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:48,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:48,110 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:48,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27674 [2021-03-10 21:34:48,311 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:48,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:48,311 INFO L82 PathProgramCache]: Analyzing trace with hash 18563529, now seen corresponding path program 408 times [2021-03-10 21:34:48,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:48,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677949044] [2021-03-10 21:34:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:48,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677949044] [2021-03-10 21:34:48,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290563136] [2021-03-10 21:34:48,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:48,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:34:48,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:48,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:49,024 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:49,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:49,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:49,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:50,050 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:50,050 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:50,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:50,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:50,919 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:50,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:50,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:50,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:50,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:34:50,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739118313] [2021-03-10 21:34:50,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:34:50,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:34:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:50,965 INFO L87 Difference]: Start difference. First operand 2494 states and 7288 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:52,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:52,227 INFO L93 Difference]: Finished difference Result 2719 states and 7749 transitions. [2021-03-10 21:34:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:34:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:52,231 INFO L225 Difference]: With dead ends: 2719 [2021-03-10 21:34:52,231 INFO L226 Difference]: Without dead ends: 2697 [2021-03-10 21:34:52,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 850.3ms TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:34:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-03-10 21:34:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2493. [2021-03-10 21:34:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.92215088282504) internal successors, (7282), 2492 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7282 transitions. [2021-03-10 21:34:52,254 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7282 transitions. Word has length 22 [2021-03-10 21:34:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:52,254 INFO L480 AbstractCegarLoop]: Abstraction has 2493 states and 7282 transitions. [2021-03-10 21:34:52,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7282 transitions. [2021-03-10 21:34:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:52,256 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:52,256 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:52,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29015,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:52,457 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1507968525, now seen corresponding path program 409 times [2021-03-10 21:34:52,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:52,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199826660] [2021-03-10 21:34:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:52,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199826660] [2021-03-10 21:34:52,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747023736] [2021-03-10 21:34:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:52,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:53,208 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:53,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:53,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:55,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:55,392 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:55,392 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:55,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:56,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:56,161 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:34:56,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:56,162 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:34:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:56,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:56,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:34:56,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278109738] [2021-03-10 21:34:56,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:34:56,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:56,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:34:56,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:56,207 INFO L87 Difference]: Start difference. First operand 2493 states and 7282 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:57,405 INFO L93 Difference]: Finished difference Result 2781 states and 7913 transitions. [2021-03-10 21:34:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:34:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:34:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:57,409 INFO L225 Difference]: With dead ends: 2781 [2021-03-10 21:34:57,409 INFO L226 Difference]: Without dead ends: 2752 [2021-03-10 21:34:57,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 994.2ms TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:34:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-03-10 21:34:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2480. [2021-03-10 21:34:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.919322307382009) internal successors, (7237), 2479 states have internal predecessors, (7237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 7237 transitions. [2021-03-10 21:34:57,433 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 7237 transitions. Word has length 22 [2021-03-10 21:34:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:57,434 INFO L480 AbstractCegarLoop]: Abstraction has 2480 states and 7237 transitions. [2021-03-10 21:34:57,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 7237 transitions. [2021-03-10 21:34:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:34:57,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:57,436 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:57,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29525 [2021-03-10 21:34:57,636 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash 434883145, now seen corresponding path program 410 times [2021-03-10 21:34:57,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:57,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968686535] [2021-03-10 21:34:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968686535] [2021-03-10 21:34:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036600113] [2021-03-10 21:34:57,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:57,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:57,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:34:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:58,321 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:58,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:58,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:00,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:01,303 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:01,304 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:01,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:01,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:01,765 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:01,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:01,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:01,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:01,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:35:01,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923598194] [2021-03-10 21:35:01,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:35:01,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:01,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:35:01,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:01,820 INFO L87 Difference]: Start difference. First operand 2480 states and 7237 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:02,996 INFO L93 Difference]: Finished difference Result 2723 states and 7787 transitions. [2021-03-10 21:35:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:35:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:03,000 INFO L225 Difference]: With dead ends: 2723 [2021-03-10 21:35:03,000 INFO L226 Difference]: Without dead ends: 2713 [2021-03-10 21:35:03,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 869.2ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:35:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-03-10 21:35:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2482. [2021-03-10 21:35:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 2.9185812172511083) internal successors, (7241), 2481 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 7241 transitions. [2021-03-10 21:35:03,024 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 7241 transitions. Word has length 22 [2021-03-10 21:35:03,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:03,024 INFO L480 AbstractCegarLoop]: Abstraction has 2482 states and 7241 transitions. [2021-03-10 21:35:03,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 7241 transitions. [2021-03-10 21:35:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:03,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:03,026 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:03,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30299 [2021-03-10 21:35:03,227 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash -832574033, now seen corresponding path program 411 times [2021-03-10 21:35:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795292175] [2021-03-10 21:35:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:03,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795292175] [2021-03-10 21:35:03,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124544137] [2021-03-10 21:35:03,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:03,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:35:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:03,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:03,992 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:03,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:03,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:04,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:05,231 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:05,231 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:05,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:07,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:07,396 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:07,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:07,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:07,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:07,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:35:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866448233] [2021-03-10 21:35:07,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:35:07,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:35:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:07,436 INFO L87 Difference]: Start difference. First operand 2482 states and 7241 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:08,776 INFO L93 Difference]: Finished difference Result 2895 states and 8241 transitions. [2021-03-10 21:35:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:35:08,777 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:08,780 INFO L225 Difference]: With dead ends: 2895 [2021-03-10 21:35:08,780 INFO L226 Difference]: Without dead ends: 2885 [2021-03-10 21:35:08,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1106.9ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:35:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-03-10 21:35:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2483. [2021-03-10 21:35:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.91941982272361) internal successors, (7246), 2482 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7246 transitions. [2021-03-10 21:35:08,806 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7246 transitions. Word has length 22 [2021-03-10 21:35:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:08,806 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 7246 transitions. [2021-03-10 21:35:08,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7246 transitions. [2021-03-10 21:35:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:08,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:08,808 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:09,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31248 [2021-03-10 21:35:09,008 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1959720747, now seen corresponding path program 412 times [2021-03-10 21:35:09,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:09,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835429540] [2021-03-10 21:35:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:09,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835429540] [2021-03-10 21:35:09,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564045185] [2021-03-10 21:35:09,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:09,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:09,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:09,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:09,780 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:09,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:09,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:11,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:11,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:11,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:11,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:11,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:11,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:35:11,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382970447] [2021-03-10 21:35:11,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:35:11,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:11,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:35:11,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:11,534 INFO L87 Difference]: Start difference. First operand 2483 states and 7246 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:12,423 INFO L93 Difference]: Finished difference Result 2645 states and 7685 transitions. [2021-03-10 21:35:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:35:12,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:12,427 INFO L225 Difference]: With dead ends: 2645 [2021-03-10 21:35:12,427 INFO L226 Difference]: Without dead ends: 2627 [2021-03-10 21:35:12,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 577.2ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:35:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-03-10 21:35:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2561. [2021-03-10 21:35:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.933984375) internal successors, (7511), 2560 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 7511 transitions. [2021-03-10 21:35:12,458 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 7511 transitions. Word has length 22 [2021-03-10 21:35:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:12,458 INFO L480 AbstractCegarLoop]: Abstraction has 2561 states and 7511 transitions. [2021-03-10 21:35:12,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 7511 transitions. [2021-03-10 21:35:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:12,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:12,460 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:12,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32172,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:12,660 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1476372019, now seen corresponding path program 413 times [2021-03-10 21:35:12,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:12,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502680409] [2021-03-10 21:35:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:12,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502680409] [2021-03-10 21:35:12,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488550167] [2021-03-10 21:35:12,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:12,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:35:12,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:12,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:12,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:13,370 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:13,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:13,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:14,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:14,450 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:14,451 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:14,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:15,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:15,406 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:15,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:15,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:15,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:15,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:35:15,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253723211] [2021-03-10 21:35:15,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:35:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:35:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:15,448 INFO L87 Difference]: Start difference. First operand 2561 states and 7511 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:17,185 INFO L93 Difference]: Finished difference Result 2850 states and 8157 transitions. [2021-03-10 21:35:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:35:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:17,189 INFO L225 Difference]: With dead ends: 2850 [2021-03-10 21:35:17,189 INFO L226 Difference]: Without dead ends: 2817 [2021-03-10 21:35:17,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1038.5ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:35:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-03-10 21:35:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2572. [2021-03-10 21:35:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2571 states have (on average 2.9362115908206925) internal successors, (7549), 2571 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 7549 transitions. [2021-03-10 21:35:17,214 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 7549 transitions. Word has length 22 [2021-03-10 21:35:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:17,214 INFO L480 AbstractCegarLoop]: Abstraction has 2572 states and 7549 transitions. [2021-03-10 21:35:17,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 7549 transitions. [2021-03-10 21:35:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:17,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:17,217 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:17,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32842,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:17,417 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 234241289, now seen corresponding path program 414 times [2021-03-10 21:35:17,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:17,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705370580] [2021-03-10 21:35:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705370580] [2021-03-10 21:35:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748383830] [2021-03-10 21:35:17,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:17,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:35:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:17,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:18,109 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:18,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:18,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:18,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:19,018 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:19,019 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:19,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:19,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:19,497 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:19,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:19,498 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:19,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:19,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:35:19,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541926666] [2021-03-10 21:35:19,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:35:19,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:19,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:35:19,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:19,540 INFO L87 Difference]: Start difference. First operand 2572 states and 7549 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:21,413 INFO L93 Difference]: Finished difference Result 3018 states and 8552 transitions. [2021-03-10 21:35:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:35:21,414 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:21,417 INFO L225 Difference]: With dead ends: 3018 [2021-03-10 21:35:21,417 INFO L226 Difference]: Without dead ends: 2971 [2021-03-10 21:35:21,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1177.3ms TimeCoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:35:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-03-10 21:35:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2579. [2021-03-10 21:35:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 2.933281613653995) internal successors, (7562), 2578 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 7562 transitions. [2021-03-10 21:35:21,442 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 7562 transitions. Word has length 22 [2021-03-10 21:35:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:21,442 INFO L480 AbstractCegarLoop]: Abstraction has 2579 states and 7562 transitions. [2021-03-10 21:35:21,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 7562 transitions. [2021-03-10 21:35:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:21,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:21,444 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:21,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33450 [2021-03-10 21:35:21,644 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:21,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1723646285, now seen corresponding path program 415 times [2021-03-10 21:35:21,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:21,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849191014] [2021-03-10 21:35:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:21,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849191014] [2021-03-10 21:35:21,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783609248] [2021-03-10 21:35:21,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:21,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:21,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:22,379 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:22,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:22,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:22,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:23,207 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:23,207 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:23,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:23,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:23,720 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:23,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:23,721 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:23,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:23,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:35:23,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878600065] [2021-03-10 21:35:23,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:35:23,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:35:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:23,764 INFO L87 Difference]: Start difference. First operand 2579 states and 7562 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:24,887 INFO L93 Difference]: Finished difference Result 2793 states and 8044 transitions. [2021-03-10 21:35:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:35:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:24,891 INFO L225 Difference]: With dead ends: 2793 [2021-03-10 21:35:24,891 INFO L226 Difference]: Without dead ends: 2778 [2021-03-10 21:35:24,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 942.4ms TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:35:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-03-10 21:35:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2592. [2021-03-10 21:35:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.932458510227711) internal successors, (7598), 2591 states have internal predecessors, (7598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7598 transitions. [2021-03-10 21:35:24,916 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7598 transitions. Word has length 22 [2021-03-10 21:35:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:24,916 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7598 transitions. [2021-03-10 21:35:24,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7598 transitions. [2021-03-10 21:35:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:24,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:24,919 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:25,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33830 [2021-03-10 21:35:25,119 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:25,120 INFO L82 PathProgramCache]: Analyzing trace with hash 650560905, now seen corresponding path program 416 times [2021-03-10 21:35:25,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:25,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508092752] [2021-03-10 21:35:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:25,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508092752] [2021-03-10 21:35:25,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084068055] [2021-03-10 21:35:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:25,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:25,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:25,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:25,872 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:25,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:25,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:27,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:27,655 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:27,655 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:27,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:28,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:28,436 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:28,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:28,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:28,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:28,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:35:28,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847700431] [2021-03-10 21:35:28,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:35:28,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:28,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:35:28,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:28,478 INFO L87 Difference]: Start difference. First operand 2592 states and 7598 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:29,438 INFO L93 Difference]: Finished difference Result 2874 states and 8265 transitions. [2021-03-10 21:35:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:35:29,439 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:29,442 INFO L225 Difference]: With dead ends: 2874 [2021-03-10 21:35:29,442 INFO L226 Difference]: Without dead ends: 2852 [2021-03-10 21:35:29,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1074.5ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:35:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-03-10 21:35:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2592. [2021-03-10 21:35:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-03-10 21:35:29,467 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-03-10 21:35:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:29,467 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-03-10 21:35:29,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-03-10 21:35:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:29,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:29,469 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:29,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34200 [2021-03-10 21:35:29,669 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1744652493, now seen corresponding path program 417 times [2021-03-10 21:35:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:29,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147189489] [2021-03-10 21:35:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147189489] [2021-03-10 21:35:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803572332] [2021-03-10 21:35:29,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:29,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:35:29,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:29,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:29,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:30,379 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:30,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:30,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:31,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:31,501 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:31,501 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:31,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:32,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:32,641 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:32,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:32,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:32,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:32,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:35:32,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655001029] [2021-03-10 21:35:32,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:35:32,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:32,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:35:32,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:32,685 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:33,561 INFO L93 Difference]: Finished difference Result 2811 states and 8117 transitions. [2021-03-10 21:35:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:35:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:33,565 INFO L225 Difference]: With dead ends: 2811 [2021-03-10 21:35:33,565 INFO L226 Difference]: Without dead ends: 2801 [2021-03-10 21:35:33,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 994.0ms TimeCoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:35:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-03-10 21:35:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2592. [2021-03-10 21:35:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-03-10 21:35:33,588 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-03-10 21:35:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:33,588 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-03-10 21:35:33,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-03-10 21:35:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:33,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:33,590 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:33,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34959,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:33,791 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:33,791 INFO L82 PathProgramCache]: Analyzing trace with hash -560398563, now seen corresponding path program 418 times [2021-03-10 21:35:33,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:33,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573431637] [2021-03-10 21:35:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:33,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573431637] [2021-03-10 21:35:33,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765665683] [2021-03-10 21:35:33,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:33,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:33,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:34,485 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:34,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:34,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:36,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:36,784 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:36,785 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:36,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:38,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:38,196 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:38,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:38,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:38,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:38,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:35:38,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287395702] [2021-03-10 21:35:38,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:35:38,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:35:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:38,247 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:39,647 INFO L93 Difference]: Finished difference Result 3052 states and 8624 transitions. [2021-03-10 21:35:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:35:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:39,652 INFO L225 Difference]: With dead ends: 3052 [2021-03-10 21:35:39,652 INFO L226 Difference]: Without dead ends: 3011 [2021-03-10 21:35:39,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1179.8ms TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:35:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-03-10 21:35:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2594. [2021-03-10 21:35:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.9298110296953337) internal successors, (7597), 2593 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7597 transitions. [2021-03-10 21:35:39,680 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7597 transitions. Word has length 22 [2021-03-10 21:35:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:39,680 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 7597 transitions. [2021-03-10 21:35:39,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7597 transitions. [2021-03-10 21:35:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:39,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:39,682 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:39,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35575 [2021-03-10 21:35:39,882 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:39,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1633483943, now seen corresponding path program 419 times [2021-03-10 21:35:39,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:39,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180693261] [2021-03-10 21:35:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:40,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180693261] [2021-03-10 21:35:40,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784911462] [2021-03-10 21:35:40,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:40,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:40,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:40,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:40,618 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:40,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:40,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:42,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:42,421 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:42,422 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:42,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:42,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:42,841 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:42,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:42,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:42,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:42,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:35:42,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039872127] [2021-03-10 21:35:42,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:35:42,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:42,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:35:42,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:42,887 INFO L87 Difference]: Start difference. First operand 2594 states and 7597 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:44,246 INFO L93 Difference]: Finished difference Result 3138 states and 8959 transitions. [2021-03-10 21:35:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:35:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:44,251 INFO L225 Difference]: With dead ends: 3138 [2021-03-10 21:35:44,251 INFO L226 Difference]: Without dead ends: 3107 [2021-03-10 21:35:44,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1214.3ms TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:35:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-03-10 21:35:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2554. [2021-03-10 21:35:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.928319623971798) internal successors, (7476), 2553 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 7476 transitions. [2021-03-10 21:35:44,277 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 7476 transitions. Word has length 22 [2021-03-10 21:35:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:44,277 INFO L480 AbstractCegarLoop]: Abstraction has 2554 states and 7476 transitions. [2021-03-10 21:35:44,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 7476 transitions. [2021-03-10 21:35:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:44,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:44,279 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:44,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36693,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:44,480 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:44,480 INFO L82 PathProgramCache]: Analyzing trace with hash -539392355, now seen corresponding path program 420 times [2021-03-10 21:35:44,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:44,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506198090] [2021-03-10 21:35:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:44,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506198090] [2021-03-10 21:35:44,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649604321] [2021-03-10 21:35:44,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:44,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:44,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:44,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:45,203 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:45,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:46,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:47,224 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:47,224 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:47,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:47,906 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:47,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:47,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:47,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:47,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:35:47,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750356610] [2021-03-10 21:35:47,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:35:47,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:35:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:47,949 INFO L87 Difference]: Start difference. First operand 2554 states and 7476 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:48,947 INFO L93 Difference]: Finished difference Result 3000 states and 8594 transitions. [2021-03-10 21:35:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:35:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:48,952 INFO L225 Difference]: With dead ends: 3000 [2021-03-10 21:35:48,952 INFO L226 Difference]: Without dead ends: 2990 [2021-03-10 21:35:48,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1020.2ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:35:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-03-10 21:35:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2556. [2021-03-10 21:35:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9287671232876713) internal successors, (7483), 2555 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7483 transitions. [2021-03-10 21:35:48,978 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7483 transitions. Word has length 22 [2021-03-10 21:35:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:48,978 INFO L480 AbstractCegarLoop]: Abstraction has 2556 states and 7483 transitions. [2021-03-10 21:35:48,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7483 transitions. [2021-03-10 21:35:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:48,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:48,980 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:49,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37229 [2021-03-10 21:35:49,180 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2125188711, now seen corresponding path program 421 times [2021-03-10 21:35:49,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:49,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297625664] [2021-03-10 21:35:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:49,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297625664] [2021-03-10 21:35:49,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473580978] [2021-03-10 21:35:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:49,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:49,903 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:49,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:50,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:50,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:50,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:50,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:50,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:50,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-10 21:35:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687297117] [2021-03-10 21:35:50,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:35:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:50,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:35:50,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:35:50,588 INFO L87 Difference]: Start difference. First operand 2556 states and 7483 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:51,110 INFO L93 Difference]: Finished difference Result 2587 states and 7530 transitions. [2021-03-10 21:35:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:51,111 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:51,115 INFO L225 Difference]: With dead ends: 2587 [2021-03-10 21:35:51,115 INFO L226 Difference]: Without dead ends: 2569 [2021-03-10 21:35:51,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 563.2ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:35:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-03-10 21:35:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2556. [2021-03-10 21:35:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9279843444227005) internal successors, (7481), 2555 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7481 transitions. [2021-03-10 21:35:51,157 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7481 transitions. Word has length 22 [2021-03-10 21:35:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:51,157 INFO L480 AbstractCegarLoop]: Abstraction has 2556 states and 7481 transitions. [2021-03-10 21:35:51,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7481 transitions. [2021-03-10 21:35:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:51,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:51,159 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:51,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37976,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:51,360 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1175859209, now seen corresponding path program 422 times [2021-03-10 21:35:51,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:51,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137715511] [2021-03-10 21:35:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137715511] [2021-03-10 21:35:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272084366] [2021-03-10 21:35:51,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:51,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:51,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:51,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:52,100 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:52,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:52,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:52,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:52,791 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:52,791 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:52,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:53,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:53,419 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:35:53,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:53,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:35:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:53,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:53,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:35:53,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208287] [2021-03-10 21:35:53,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:35:53,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:53,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:35:53,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:53,461 INFO L87 Difference]: Start difference. First operand 2556 states and 7481 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:54,691 INFO L93 Difference]: Finished difference Result 3029 states and 8704 transitions. [2021-03-10 21:35:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:35:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:54,695 INFO L225 Difference]: With dead ends: 3029 [2021-03-10 21:35:54,695 INFO L226 Difference]: Without dead ends: 3019 [2021-03-10 21:35:54,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1163.1ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:35:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-03-10 21:35:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2564. [2021-03-10 21:35:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.928209129925868) internal successors, (7505), 2563 states have internal predecessors, (7505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7505 transitions. [2021-03-10 21:35:54,719 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7505 transitions. Word has length 22 [2021-03-10 21:35:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:54,719 INFO L480 AbstractCegarLoop]: Abstraction has 2564 states and 7505 transitions. [2021-03-10 21:35:54,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7505 transitions. [2021-03-10 21:35:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:54,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:54,721 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:54,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38213,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:54,921 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2066719163, now seen corresponding path program 423 times [2021-03-10 21:35:54,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:54,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177870689] [2021-03-10 21:35:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:55,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177870689] [2021-03-10 21:35:55,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759975314] [2021-03-10 21:35:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:55,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:55,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:55,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:55,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:55,594 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:55,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:55,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:57,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:57,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:57,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:57,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:57,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:57,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:35:57,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834523309] [2021-03-10 21:35:57,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:35:57,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:57,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:35:57,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:57,984 INFO L87 Difference]: Start difference. First operand 2564 states and 7505 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:58,454 INFO L93 Difference]: Finished difference Result 2711 states and 7924 transitions. [2021-03-10 21:35:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:35:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:35:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:58,458 INFO L225 Difference]: With dead ends: 2711 [2021-03-10 21:35:58,458 INFO L226 Difference]: Without dead ends: 2695 [2021-03-10 21:35:58,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:35:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-03-10 21:35:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2645. [2021-03-10 21:35:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.9436459909228443) internal successors, (7783), 2644 states have internal predecessors, (7783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 7783 transitions. [2021-03-10 21:35:58,482 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 7783 transitions. Word has length 22 [2021-03-10 21:35:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:58,482 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 7783 transitions. [2021-03-10 21:35:58,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 7783 transitions. [2021-03-10 21:35:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:35:58,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:58,484 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:58,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38590,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:58,685 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1369373603, now seen corresponding path program 424 times [2021-03-10 21:35:58,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:58,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139757362] [2021-03-10 21:35:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:58,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139757362] [2021-03-10 21:35:58,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582277808] [2021-03-10 21:35:58,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:58,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:58,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:35:58,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:59,353 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:59,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:59,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:00,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:01,096 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:01,096 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:02,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:02,345 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:02,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:02,345 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:02,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:36:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704531608] [2021-03-10 21:36:02,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:36:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:36:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:36:02,388 INFO L87 Difference]: Start difference. First operand 2645 states and 7783 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:04,090 INFO L93 Difference]: Finished difference Result 2975 states and 8581 transitions. [2021-03-10 21:36:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:36:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:04,094 INFO L225 Difference]: With dead ends: 2975 [2021-03-10 21:36:04,094 INFO L226 Difference]: Without dead ends: 2942 [2021-03-10 21:36:04,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1101.0ms TimeCoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:36:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-03-10 21:36:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2661. [2021-03-10 21:36:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.946240601503759) internal successors, (7837), 2660 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7837 transitions. [2021-03-10 21:36:04,119 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7837 transitions. Word has length 22 [2021-03-10 21:36:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:04,119 INFO L480 AbstractCegarLoop]: Abstraction has 2661 states and 7837 transitions. [2021-03-10 21:36:04,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7837 transitions. [2021-03-10 21:36:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:04,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:04,121 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:04,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39416 [2021-03-10 21:36:04,322 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:04,322 INFO L82 PathProgramCache]: Analyzing trace with hash 341239705, now seen corresponding path program 425 times [2021-03-10 21:36:04,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:04,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485278177] [2021-03-10 21:36:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:04,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485278177] [2021-03-10 21:36:04,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755678305] [2021-03-10 21:36:04,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:04,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:36:04,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:04,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:05,063 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:05,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:05,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:05,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:05,828 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:05,829 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:05,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:07,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:07,907 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:07,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:07,908 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:07,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:07,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:36:07,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523433406] [2021-03-10 21:36:07,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:36:07,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:07,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:36:07,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:36:07,948 INFO L87 Difference]: Start difference. First operand 2661 states and 7837 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:09,168 INFO L93 Difference]: Finished difference Result 2918 states and 8462 transitions. [2021-03-10 21:36:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:36:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:09,172 INFO L225 Difference]: With dead ends: 2918 [2021-03-10 21:36:09,172 INFO L226 Difference]: Without dead ends: 2908 [2021-03-10 21:36:09,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 903.9ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:36:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-03-10 21:36:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2687. [2021-03-10 21:36:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.948994787788533) internal successors, (7921), 2686 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7921 transitions. [2021-03-10 21:36:09,198 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7921 transitions. Word has length 22 [2021-03-10 21:36:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:09,198 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7921 transitions. [2021-03-10 21:36:09,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7921 transitions. [2021-03-10 21:36:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:09,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:09,200 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:09,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40333,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:09,400 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1830644701, now seen corresponding path program 426 times [2021-03-10 21:36:09,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:09,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220368788] [2021-03-10 21:36:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:09,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220368788] [2021-03-10 21:36:09,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834343634] [2021-03-10 21:36:09,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:09,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:09,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:10,094 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:10,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:10,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:11,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:11,500 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:11,501 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:11,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:13,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:13,713 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:13,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:13,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:13,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:36:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475687308] [2021-03-10 21:36:13,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:36:13,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:36:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:36:13,757 INFO L87 Difference]: Start difference. First operand 2687 states and 7921 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:15,344 INFO L93 Difference]: Finished difference Result 3155 states and 9023 transitions. [2021-03-10 21:36:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 21:36:15,345 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:15,349 INFO L225 Difference]: With dead ends: 3155 [2021-03-10 21:36:15,349 INFO L226 Difference]: Without dead ends: 3121 [2021-03-10 21:36:15,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1228.7ms TimeCoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:36:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-03-10 21:36:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2693. [2021-03-10 21:36:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.947251114413076) internal successors, (7934), 2692 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7934 transitions. [2021-03-10 21:36:15,378 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7934 transitions. Word has length 22 [2021-03-10 21:36:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:15,378 INFO L480 AbstractCegarLoop]: Abstraction has 2693 states and 7934 transitions. [2021-03-10 21:36:15,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7934 transitions. [2021-03-10 21:36:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:15,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:15,380 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:15,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41138,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:15,581 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 757559321, now seen corresponding path program 427 times [2021-03-10 21:36:15,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:15,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054141703] [2021-03-10 21:36:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:15,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054141703] [2021-03-10 21:36:15,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453263576] [2021-03-10 21:36:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:15,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:16,291 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:16,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:16,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:17,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:18,044 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:18,045 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:18,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:19,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:19,083 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:19,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:19,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:19,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:19,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:36:19,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894393872] [2021-03-10 21:36:19,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:36:19,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:19,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:36:19,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:36:19,136 INFO L87 Difference]: Start difference. First operand 2693 states and 7934 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:20,320 INFO L93 Difference]: Finished difference Result 2902 states and 8407 transitions. [2021-03-10 21:36:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:36:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:20,325 INFO L225 Difference]: With dead ends: 2902 [2021-03-10 21:36:20,325 INFO L226 Difference]: Without dead ends: 2887 [2021-03-10 21:36:20,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1146.1ms TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:36:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-03-10 21:36:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2699. [2021-03-10 21:36:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946256486286138) internal successors, (7949), 2698 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7949 transitions. [2021-03-10 21:36:20,352 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7949 transitions. Word has length 22 [2021-03-10 21:36:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:20,352 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7949 transitions. [2021-03-10 21:36:20,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7949 transitions. [2021-03-10 21:36:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:20,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:20,354 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:20,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42142 [2021-03-10 21:36:20,567 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1851650909, now seen corresponding path program 428 times [2021-03-10 21:36:20,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:20,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482640339] [2021-03-10 21:36:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:20,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482640339] [2021-03-10 21:36:20,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944992426] [2021-03-10 21:36:20,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:20,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:20,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:20,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:20,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:21,361 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:21,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:21,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:22,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:22,926 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:22,927 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:22,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:25,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:25,538 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:25,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:25,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:25,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:25,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:36:25,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059308998] [2021-03-10 21:36:25,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:36:25,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:25,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:36:25,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:36:25,588 INFO L87 Difference]: Start difference. First operand 2699 states and 7949 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:27,047 INFO L93 Difference]: Finished difference Result 2977 states and 8602 transitions. [2021-03-10 21:36:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:36:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:27,052 INFO L225 Difference]: With dead ends: 2977 [2021-03-10 21:36:27,052 INFO L226 Difference]: Without dead ends: 2962 [2021-03-10 21:36:27,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1365.7ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:36:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2021-03-10 21:36:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2699. [2021-03-10 21:36:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-03-10 21:36:27,078 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-03-10 21:36:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:27,078 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-03-10 21:36:27,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-03-10 21:36:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:27,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:27,081 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:27,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42942,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:27,281 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1408751769, now seen corresponding path program 429 times [2021-03-10 21:36:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:27,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663403221] [2021-03-10 21:36:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:27,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663403221] [2021-03-10 21:36:27,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511733963] [2021-03-10 21:36:27,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:27,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:36:27,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:27,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:27,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:28,141 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:28,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:28,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:30,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:30,508 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:30,509 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:31,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:31,752 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:31,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:31,753 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:31,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:31,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:36:31,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144199613] [2021-03-10 21:36:31,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:36:31,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:31,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:36:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:36:31,801 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:32,995 INFO L93 Difference]: Finished difference Result 2918 states and 8461 transitions. [2021-03-10 21:36:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:36:32,996 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:32,999 INFO L225 Difference]: With dead ends: 2918 [2021-03-10 21:36:32,999 INFO L226 Difference]: Without dead ends: 2908 [2021-03-10 21:36:32,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1233.2ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:36:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-03-10 21:36:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2699. [2021-03-10 21:36:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-03-10 21:36:33,024 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-03-10 21:36:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:33,024 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-03-10 21:36:33,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-03-10 21:36:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:33,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:33,026 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:33,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44081,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:33,227 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:33,227 INFO L82 PathProgramCache]: Analyzing trace with hash 998887215, now seen corresponding path program 430 times [2021-03-10 21:36:33,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:33,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357377762] [2021-03-10 21:36:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:33,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357377762] [2021-03-10 21:36:33,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022995342] [2021-03-10 21:36:33,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:33,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:33,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:34,128 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:34,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:34,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:35,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:35,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:35,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:36:35,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:36:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:35,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:35,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:36:35,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884777454] [2021-03-10 21:36:35,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:36:35,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:36:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:36:35,459 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:36,155 INFO L93 Difference]: Finished difference Result 2738 states and 8012 transitions. [2021-03-10 21:36:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:36:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:36,159 INFO L225 Difference]: With dead ends: 2738 [2021-03-10 21:36:36,159 INFO L226 Difference]: Without dead ends: 2712 [2021-03-10 21:36:36,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 846.7ms TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:36:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-03-10 21:36:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2699. [2021-03-10 21:36:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946997776130467) internal successors, (7951), 2698 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7951 transitions. [2021-03-10 21:36:36,184 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7951 transitions. Word has length 22 [2021-03-10 21:36:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:36,184 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7951 transitions. [2021-03-10 21:36:36,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7951 transitions. [2021-03-10 21:36:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:36,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:36,186 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:36,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45012 [2021-03-10 21:36:36,386 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:36,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:36,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1502482099, now seen corresponding path program 431 times [2021-03-10 21:36:36,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:36,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345524148] [2021-03-10 21:36:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:36,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345524148] [2021-03-10 21:36:36,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77060534] [2021-03-10 21:36:36,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:36,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:36:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:36,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:37,143 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:37,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:37,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:38,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:38,620 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:38,621 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:38,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:39,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:39,986 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:39,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:39,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:40,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:40,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:36:40,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506919861] [2021-03-10 21:36:40,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:36:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:36:40,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:36:40,029 INFO L87 Difference]: Start difference. First operand 2699 states and 7951 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:41,307 INFO L93 Difference]: Finished difference Result 3366 states and 9748 transitions. [2021-03-10 21:36:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:36:41,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:41,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:41,312 INFO L225 Difference]: With dead ends: 3366 [2021-03-10 21:36:41,312 INFO L226 Difference]: Without dead ends: 3356 [2021-03-10 21:36:41,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1249.3ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:36:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-03-10 21:36:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2699. [2021-03-10 21:36:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9458858413639732) internal successors, (7948), 2698 states have internal predecessors, (7948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7948 transitions. [2021-03-10 21:36:41,340 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7948 transitions. Word has length 22 [2021-03-10 21:36:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:41,340 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7948 transitions. [2021-03-10 21:36:41,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7948 transitions. [2021-03-10 21:36:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:41,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:41,342 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:41,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45460,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:41,543 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:41,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash 14616815, now seen corresponding path program 432 times [2021-03-10 21:36:41,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:41,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433399983] [2021-03-10 21:36:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433399983] [2021-03-10 21:36:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189324185] [2021-03-10 21:36:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:41,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:41,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:41,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:42,228 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:42,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:42,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:42,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:43,206 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:43,206 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:43,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:43,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:43,750 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:43,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:43,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:43,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:43,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:36:43,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517220535] [2021-03-10 21:36:43,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:36:43,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:43,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:36:43,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:36:43,792 INFO L87 Difference]: Start difference. First operand 2699 states and 7948 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:45,276 INFO L93 Difference]: Finished difference Result 3100 states and 8894 transitions. [2021-03-10 21:36:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:36:45,277 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:45,280 INFO L225 Difference]: With dead ends: 3100 [2021-03-10 21:36:45,280 INFO L226 Difference]: Without dead ends: 3078 [2021-03-10 21:36:45,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1042.7ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:36:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-03-10 21:36:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2707. [2021-03-10 21:36:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.9464153732446414) internal successors, (7973), 2706 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 7973 transitions. [2021-03-10 21:36:45,306 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 7973 transitions. Word has length 22 [2021-03-10 21:36:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:45,306 INFO L480 AbstractCegarLoop]: Abstraction has 2707 states and 7973 transitions. [2021-03-10 21:36:45,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 7973 transitions. [2021-03-10 21:36:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:45,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:45,309 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:45,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46320,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:45,509 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1504021811, now seen corresponding path program 433 times [2021-03-10 21:36:45,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:45,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289797856] [2021-03-10 21:36:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:45,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289797856] [2021-03-10 21:36:45,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699378583] [2021-03-10 21:36:45,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:45,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:46,212 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:46,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:48,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:48,820 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:48,821 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:48,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:49,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:49,884 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:49,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:49,885 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:49,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:49,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:36:49,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371068579] [2021-03-10 21:36:49,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:36:49,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:36:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:36:49,943 INFO L87 Difference]: Start difference. First operand 2707 states and 7973 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:51,878 INFO L93 Difference]: Finished difference Result 3336 states and 9435 transitions. [2021-03-10 21:36:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:36:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:51,883 INFO L225 Difference]: With dead ends: 3336 [2021-03-10 21:36:51,883 INFO L226 Difference]: Without dead ends: 3288 [2021-03-10 21:36:51,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1470.9ms TimeCoverageRelationStatistics Valid=410, Invalid=3250, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 21:36:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-03-10 21:36:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2710. [2021-03-10 21:36:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.9427833148763383) internal successors, (7972), 2709 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 7972 transitions. [2021-03-10 21:36:51,914 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 7972 transitions. Word has length 22 [2021-03-10 21:36:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:51,914 INFO L480 AbstractCegarLoop]: Abstraction has 2710 states and 7972 transitions. [2021-03-10 21:36:51,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 7972 transitions. [2021-03-10 21:36:51,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:51,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:51,916 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:52,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46785 [2021-03-10 21:36:52,117 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 430936431, now seen corresponding path program 434 times [2021-03-10 21:36:52,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:52,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319134140] [2021-03-10 21:36:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:52,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319134140] [2021-03-10 21:36:52,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913495016] [2021-03-10 21:36:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:52,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:52,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:52,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:52,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:53,020 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:53,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:53,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:53,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:53,905 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:53,906 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:53,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:55,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:55,543 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:55,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:55,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:36:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:55,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:55,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:36:55,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470567120] [2021-03-10 21:36:55,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:36:55,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:36:55,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:36:55,595 INFO L87 Difference]: Start difference. First operand 2710 states and 7972 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:56,899 INFO L93 Difference]: Finished difference Result 3007 states and 8651 transitions. [2021-03-10 21:36:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:36:56,900 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:36:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:56,904 INFO L225 Difference]: With dead ends: 3007 [2021-03-10 21:36:56,904 INFO L226 Difference]: Without dead ends: 2992 [2021-03-10 21:36:56,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1323.9ms TimeCoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:36:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-03-10 21:36:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2729. [2021-03-10 21:36:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2728 states have (on average 2.941348973607038) internal successors, (8024), 2728 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 8024 transitions. [2021-03-10 21:36:56,931 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 8024 transitions. Word has length 22 [2021-03-10 21:36:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:56,932 INFO L480 AbstractCegarLoop]: Abstraction has 2729 states and 8024 transitions. [2021-03-10 21:36:56,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 8024 transitions. [2021-03-10 21:36:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:56,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:56,934 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:57,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47816,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:57,134 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:57,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1525028019, now seen corresponding path program 435 times [2021-03-10 21:36:57,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:57,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224570676] [2021-03-10 21:36:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:57,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224570676] [2021-03-10 21:36:57,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865396514] [2021-03-10 21:36:57,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:57,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:36:57,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:57,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:58,031 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:58,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:00,592 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1611 DAG size of output: 853 [2021-03-10 21:37:00,708 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1611 DAG size of output: 853 [2021-03-10 21:37:00,826 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1616 DAG size of output: 858 [2021-03-10 21:37:02,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:02,967 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:02,968 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:02,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:04,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:04,626 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:04,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:04,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:04,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:04,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:37:04,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056893943] [2021-03-10 21:37:04,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:37:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:04,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:37:04,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:37:04,684 INFO L87 Difference]: Start difference. First operand 2729 states and 8024 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:05,975 INFO L93 Difference]: Finished difference Result 3110 states and 8920 transitions. [2021-03-10 21:37:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:37:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:05,980 INFO L225 Difference]: With dead ends: 3110 [2021-03-10 21:37:05,980 INFO L226 Difference]: Without dead ends: 3095 [2021-03-10 21:37:05,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1344.9ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:37:05,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-03-10 21:37:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2732. [2021-03-10 21:37:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 2.943610399121201) internal successors, (8039), 2731 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 8039 transitions. [2021-03-10 21:37:06,006 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 8039 transitions. Word has length 22 [2021-03-10 21:37:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:06,006 INFO L480 AbstractCegarLoop]: Abstraction has 2732 states and 8039 transitions. [2021-03-10 21:37:06,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 8039 transitions. [2021-03-10 21:37:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:06,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:06,008 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:06,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48501,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:06,209 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1082128879, now seen corresponding path program 436 times [2021-03-10 21:37:06,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:06,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591771679] [2021-03-10 21:37:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:06,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591771679] [2021-03-10 21:37:06,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671673549] [2021-03-10 21:37:06,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:06,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:06,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:06,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:07,013 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:07,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:07,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:08,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:08,607 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:08,608 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:09,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:09,853 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:09,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:09,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:09,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:09,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:37:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015889583] [2021-03-10 21:37:09,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:37:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:37:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:37:09,906 INFO L87 Difference]: Start difference. First operand 2732 states and 8039 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:11,355 INFO L93 Difference]: Finished difference Result 3038 states and 8759 transitions. [2021-03-10 21:37:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:37:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:11,360 INFO L225 Difference]: With dead ends: 3038 [2021-03-10 21:37:11,360 INFO L226 Difference]: Without dead ends: 3028 [2021-03-10 21:37:11,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1396.9ms TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:37:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-03-10 21:37:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2734. [2021-03-10 21:37:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.9425539699963412) internal successors, (8042), 2733 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 8042 transitions. [2021-03-10 21:37:11,388 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 8042 transitions. Word has length 22 [2021-03-10 21:37:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:11,388 INFO L480 AbstractCegarLoop]: Abstraction has 2734 states and 8042 transitions. [2021-03-10 21:37:11,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 8042 transitions. [2021-03-10 21:37:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:11,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:11,391 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:11,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50041,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:11,605 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1328354231, now seen corresponding path program 437 times [2021-03-10 21:37:11,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:11,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490520078] [2021-03-10 21:37:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:11,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490520078] [2021-03-10 21:37:11,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555793522] [2021-03-10 21:37:11,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:11,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:37:11,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:11,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:11,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:12,533 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:12,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:12,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:13,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:14,046 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:14,047 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:14,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:16,280 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 801 [2021-03-10 21:37:17,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:17,724 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:17,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:17,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:17,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:17,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:37:17,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560921699] [2021-03-10 21:37:17,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:37:17,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:37:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:37:17,775 INFO L87 Difference]: Start difference. First operand 2734 states and 8042 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:20,018 INFO L93 Difference]: Finished difference Result 3510 states and 9948 transitions. [2021-03-10 21:37:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:37:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:20,023 INFO L225 Difference]: With dead ends: 3510 [2021-03-10 21:37:20,023 INFO L226 Difference]: Without dead ends: 3469 [2021-03-10 21:37:20,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1823.1ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 21:37:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-03-10 21:37:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2730. [2021-03-10 21:37:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2729 states have (on average 2.9399047270062293) internal successors, (8023), 2729 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 8023 transitions. [2021-03-10 21:37:20,051 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 8023 transitions. Word has length 22 [2021-03-10 21:37:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:20,051 INFO L480 AbstractCegarLoop]: Abstraction has 2730 states and 8023 transitions. [2021-03-10 21:37:20,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 8023 transitions. [2021-03-10 21:37:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:20,053 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:20,053 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:20,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50806,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:20,253 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash -234262643, now seen corresponding path program 438 times [2021-03-10 21:37:20,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:20,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886378082] [2021-03-10 21:37:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:20,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886378082] [2021-03-10 21:37:20,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776037951] [2021-03-10 21:37:20,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:20,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:37:20,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:20,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:20,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:21,227 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:21,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:21,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:23,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:23,624 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:23,624 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:23,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:24,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:24,631 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:24,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:24,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:24,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:24,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:37:24,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132646277] [2021-03-10 21:37:24,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:37:24,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:24,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:37:24,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:37:24,676 INFO L87 Difference]: Start difference. First operand 2730 states and 8023 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:26,598 INFO L93 Difference]: Finished difference Result 3643 states and 10471 transitions. [2021-03-10 21:37:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:37:26,599 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:26,603 INFO L225 Difference]: With dead ends: 3643 [2021-03-10 21:37:26,603 INFO L226 Difference]: Without dead ends: 3610 [2021-03-10 21:37:26,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1727.9ms TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:37:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-03-10 21:37:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2622. [2021-03-10 21:37:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2621 states have (on average 2.9355207935902325) internal successors, (7694), 2621 states have internal predecessors, (7694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:26,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 7694 transitions. [2021-03-10 21:37:26,633 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 7694 transitions. Word has length 22 [2021-03-10 21:37:26,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:26,633 INFO L480 AbstractCegarLoop]: Abstraction has 2622 states and 7694 transitions. [2021-03-10 21:37:26,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 7694 transitions. [2021-03-10 21:37:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:26,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:26,635 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:26,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52078,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:26,836 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:26,836 INFO L82 PathProgramCache]: Analyzing trace with hash -677161783, now seen corresponding path program 439 times [2021-03-10 21:37:26,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:26,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105316807] [2021-03-10 21:37:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:27,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105316807] [2021-03-10 21:37:27,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360843725] [2021-03-10 21:37:27,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:27,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:27,780 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:27,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:27,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:28,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:28,593 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:28,593 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:28,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:29,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:29,214 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:29,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:29,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:29,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:29,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:37:29,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424303666] [2021-03-10 21:37:29,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:37:29,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:29,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:37:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:37:29,277 INFO L87 Difference]: Start difference. First operand 2622 states and 7694 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:30,972 INFO L93 Difference]: Finished difference Result 3243 states and 9300 transitions. [2021-03-10 21:37:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:37:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:30,977 INFO L225 Difference]: With dead ends: 3243 [2021-03-10 21:37:30,977 INFO L226 Difference]: Without dead ends: 3233 [2021-03-10 21:37:30,978 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1513.5ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:37:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2021-03-10 21:37:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2624. [2021-03-10 21:37:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.9363324437666796) internal successors, (7702), 2623 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 7702 transitions. [2021-03-10 21:37:31,006 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 7702 transitions. Word has length 22 [2021-03-10 21:37:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:31,006 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 7702 transitions. [2021-03-10 21:37:31,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 7702 transitions. [2021-03-10 21:37:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:31,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:31,009 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:31,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52999 [2021-03-10 21:37:31,209 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1067202223, now seen corresponding path program 440 times [2021-03-10 21:37:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:31,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851953464] [2021-03-10 21:37:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:31,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851953464] [2021-03-10 21:37:31,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687818750] [2021-03-10 21:37:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:31,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:31,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:31,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:32,235 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:32,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:32,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:33,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:34,000 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:34,000 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:34,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:34,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:34,647 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:34,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:34,648 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:34,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:34,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:37:34,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112761006] [2021-03-10 21:37:34,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:37:34,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:37:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:37:34,704 INFO L87 Difference]: Start difference. First operand 2624 states and 7702 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:36,802 INFO L93 Difference]: Finished difference Result 3200 states and 9255 transitions. [2021-03-10 21:37:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:37:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:36,806 INFO L225 Difference]: With dead ends: 3200 [2021-03-10 21:37:36,806 INFO L226 Difference]: Without dead ends: 3190 [2021-03-10 21:37:36,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1906.3ms TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:37:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-03-10 21:37:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2692. [2021-03-10 21:37:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.938684503901895) internal successors, (7908), 2691 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7908 transitions. [2021-03-10 21:37:36,834 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7908 transitions. Word has length 22 [2021-03-10 21:37:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:36,834 INFO L480 AbstractCegarLoop]: Abstraction has 2692 states and 7908 transitions. [2021-03-10 21:37:36,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7908 transitions. [2021-03-10 21:37:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:36,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:36,836 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:37,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53338 [2021-03-10 21:37:37,037 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:37,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1088702763, now seen corresponding path program 441 times [2021-03-10 21:37:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:37,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497851838] [2021-03-10 21:37:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497851838] [2021-03-10 21:37:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383084684] [2021-03-10 21:37:37,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:37,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:37:37,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:37,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:37,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:37,923 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:37,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:37,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:38,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:38,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:38,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:37:38,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:37:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:38,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:38,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:37:38,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404660150] [2021-03-10 21:37:38,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:37:38,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:38,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:37:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:37:38,414 INFO L87 Difference]: Start difference. First operand 2692 states and 7908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:39,524 INFO L93 Difference]: Finished difference Result 2915 states and 8552 transitions. [2021-03-10 21:37:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:37:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:39,529 INFO L225 Difference]: With dead ends: 2915 [2021-03-10 21:37:39,529 INFO L226 Difference]: Without dead ends: 2897 [2021-03-10 21:37:39,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 656.7ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:37:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-03-10 21:37:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2847. [2021-03-10 21:37:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.95572733661279) internal successors, (8412), 2846 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 8412 transitions. [2021-03-10 21:37:39,557 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 8412 transitions. Word has length 22 [2021-03-10 21:37:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:39,557 INFO L480 AbstractCegarLoop]: Abstraction has 2847 states and 8412 transitions. [2021-03-10 21:37:39,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 8412 transitions. [2021-03-10 21:37:39,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:39,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:39,559 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:39,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54056,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:39,760 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1947577293, now seen corresponding path program 442 times [2021-03-10 21:37:39,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:39,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248080491] [2021-03-10 21:37:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:39,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248080491] [2021-03-10 21:37:39,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423197115] [2021-03-10 21:37:39,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:39,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:39,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:39,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:40,601 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:40,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:40,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:41,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:41,818 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:41,818 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:41,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:42,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:42,412 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:42,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:42,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:42,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:42,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:37:42,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269765734] [2021-03-10 21:37:42,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:37:42,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:37:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:37:42,468 INFO L87 Difference]: Start difference. First operand 2847 states and 8412 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:45,321 INFO L93 Difference]: Finished difference Result 3268 states and 9465 transitions. [2021-03-10 21:37:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:37:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:45,327 INFO L225 Difference]: With dead ends: 3268 [2021-03-10 21:37:45,327 INFO L226 Difference]: Without dead ends: 3228 [2021-03-10 21:37:45,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1539.3ms TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:37:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-03-10 21:37:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2862. [2021-03-10 21:37:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.9598042642432714) internal successors, (8468), 2861 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 8468 transitions. [2021-03-10 21:37:45,357 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 8468 transitions. Word has length 22 [2021-03-10 21:37:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:45,357 INFO L480 AbstractCegarLoop]: Abstraction has 2862 states and 8468 transitions. [2021-03-10 21:37:45,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 8468 transitions. [2021-03-10 21:37:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:45,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:45,360 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:45,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54227,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:45,561 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash -636776695, now seen corresponding path program 443 times [2021-03-10 21:37:45,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:45,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972651487] [2021-03-10 21:37:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:45,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972651487] [2021-03-10 21:37:45,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173225636] [2021-03-10 21:37:45,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:45,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:37:45,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:45,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:45,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:46,474 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:46,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:46,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:47,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:47,654 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:47,655 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:47,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:48,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:48,093 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:48,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:48,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:48,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:48,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:37:48,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555628057] [2021-03-10 21:37:48,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:37:48,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:37:48,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:48,138 INFO L87 Difference]: Start difference. First operand 2862 states and 8468 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:50,796 INFO L93 Difference]: Finished difference Result 3624 states and 10394 transitions. [2021-03-10 21:37:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:37:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:50,801 INFO L225 Difference]: With dead ends: 3624 [2021-03-10 21:37:50,801 INFO L226 Difference]: Without dead ends: 3563 [2021-03-10 21:37:50,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1797.8ms TimeCoverageRelationStatistics Valid=541, Invalid=4289, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:37:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-03-10 21:37:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2882. [2021-03-10 21:37:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 2.9597362027073935) internal successors, (8527), 2881 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 8527 transitions. [2021-03-10 21:37:50,831 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 8527 transitions. Word has length 22 [2021-03-10 21:37:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:50,831 INFO L480 AbstractCegarLoop]: Abstraction has 2882 states and 8527 transitions. [2021-03-10 21:37:50,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 8527 transitions. [2021-03-10 21:37:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:50,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:50,833 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:51,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54711,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:51,034 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash 852628301, now seen corresponding path program 444 times [2021-03-10 21:37:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:51,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429995275] [2021-03-10 21:37:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:51,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429995275] [2021-03-10 21:37:51,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15602977] [2021-03-10 21:37:51,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:51,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:37:51,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:51,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:51,901 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:51,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:51,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:52,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:53,288 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:53,288 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:53,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:55,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:55,091 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:55,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:55,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:37:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:55,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:55,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:37:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538778149] [2021-03-10 21:37:55,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:37:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:37:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:55,137 INFO L87 Difference]: Start difference. First operand 2882 states and 8527 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:57,076 INFO L93 Difference]: Finished difference Result 3383 states and 9835 transitions. [2021-03-10 21:37:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:37:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:37:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:57,082 INFO L225 Difference]: With dead ends: 3383 [2021-03-10 21:37:57,082 INFO L226 Difference]: Without dead ends: 3368 [2021-03-10 21:37:57,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1317.6ms TimeCoverageRelationStatistics Valid=305, Invalid=2665, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:37:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-03-10 21:37:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2956. [2021-03-10 21:37:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.964128595600677) internal successors, (8759), 2955 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 8759 transitions. [2021-03-10 21:37:57,114 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 8759 transitions. Word has length 22 [2021-03-10 21:37:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:57,114 INFO L480 AbstractCegarLoop]: Abstraction has 2956 states and 8759 transitions. [2021-03-10 21:37:57,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 8759 transitions. [2021-03-10 21:37:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:57,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:57,117 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:57,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55153,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:57,317 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash -220457079, now seen corresponding path program 445 times [2021-03-10 21:37:57,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:57,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230635684] [2021-03-10 21:37:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:57,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230635684] [2021-03-10 21:37:57,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265280290] [2021-03-10 21:37:57,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:57,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:58,297 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:58,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:58,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:59,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:00,173 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:00,174 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:00,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:00,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:00,747 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:00,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:00,748 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:00,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:00,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:38:00,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285778743] [2021-03-10 21:38:00,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:38:00,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:00,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:38:00,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:38:00,815 INFO L87 Difference]: Start difference. First operand 2956 states and 8759 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:03,499 INFO L93 Difference]: Finished difference Result 3629 states and 10445 transitions. [2021-03-10 21:38:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:38:03,500 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:03,504 INFO L225 Difference]: With dead ends: 3629 [2021-03-10 21:38:03,504 INFO L226 Difference]: Without dead ends: 3597 [2021-03-10 21:38:03,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2048.2ms TimeCoverageRelationStatistics Valid=456, Invalid=3834, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:38:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-03-10 21:38:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2955. [2021-03-10 21:38:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.9617467840216656) internal successors, (8749), 2954 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 8749 transitions. [2021-03-10 21:38:03,536 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 8749 transitions. Word has length 22 [2021-03-10 21:38:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:03,536 INFO L480 AbstractCegarLoop]: Abstraction has 2955 states and 8749 transitions. [2021-03-10 21:38:03,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 8749 transitions. [2021-03-10 21:38:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:03,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:03,538 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:03,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55999,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:03,739 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 873634509, now seen corresponding path program 446 times [2021-03-10 21:38:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:03,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201798893] [2021-03-10 21:38:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201798893] [2021-03-10 21:38:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570327597] [2021-03-10 21:38:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:04,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:38:04,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:04,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:04,800 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:04,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:04,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:05,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:06,165 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:06,166 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:08,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:08,836 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:08,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:08,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:08,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:08,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:38:08,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527624800] [2021-03-10 21:38:08,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:38:08,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:38:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:38:08,885 INFO L87 Difference]: Start difference. First operand 2955 states and 8749 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:10,537 INFO L93 Difference]: Finished difference Result 3260 states and 9483 transitions. [2021-03-10 21:38:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:38:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:10,541 INFO L225 Difference]: With dead ends: 3260 [2021-03-10 21:38:10,542 INFO L226 Difference]: Without dead ends: 3245 [2021-03-10 21:38:10,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1681.8ms TimeCoverageRelationStatistics Valid=361, Invalid=2609, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:38:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-03-10 21:38:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2963. [2021-03-10 21:38:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 2.960837272113437) internal successors, (8770), 2962 states have internal predecessors, (8770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 8770 transitions. [2021-03-10 21:38:10,571 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 8770 transitions. Word has length 22 [2021-03-10 21:38:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:10,571 INFO L480 AbstractCegarLoop]: Abstraction has 2963 states and 8770 transitions. [2021-03-10 21:38:10,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 8770 transitions. [2021-03-10 21:38:10,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:10,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:10,574 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:10,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56654 [2021-03-10 21:38:10,774 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:10,774 INFO L82 PathProgramCache]: Analyzing trace with hash 430735369, now seen corresponding path program 447 times [2021-03-10 21:38:10,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:10,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920422925] [2021-03-10 21:38:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:10,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920422925] [2021-03-10 21:38:10,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643237187] [2021-03-10 21:38:10,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:38:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:11,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:11,718 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:11,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:11,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:12,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:12,554 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:12,554 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:12,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:12,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:12,950 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:12,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:12,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:12,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:12,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:38:12,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709532315] [2021-03-10 21:38:12,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:38:12,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:38:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:38:12,998 INFO L87 Difference]: Start difference. First operand 2963 states and 8770 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:14,885 INFO L93 Difference]: Finished difference Result 3373 states and 9785 transitions. [2021-03-10 21:38:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:38:14,886 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:14,890 INFO L225 Difference]: With dead ends: 3373 [2021-03-10 21:38:14,890 INFO L226 Difference]: Without dead ends: 3358 [2021-03-10 21:38:14,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1588.7ms TimeCoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:38:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-03-10 21:38:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 2965. [2021-03-10 21:38:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-03-10 21:38:14,920 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-03-10 21:38:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:14,920 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-03-10 21:38:14,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-03-10 21:38:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:14,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:14,923 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:15,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57554 [2021-03-10 21:38:15,123 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash -414236083, now seen corresponding path program 448 times [2021-03-10 21:38:15,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:15,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959915157] [2021-03-10 21:38:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:15,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959915157] [2021-03-10 21:38:15,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18722293] [2021-03-10 21:38:15,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:15,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:38:15,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:15,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:15,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:16,005 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:16,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:17,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:17,441 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:17,441 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:17,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:18,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:18,816 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:18,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:18,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:18,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:18,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:38:18,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803519246] [2021-03-10 21:38:18,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:38:18,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:38:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:38:18,861 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:20,275 INFO L93 Difference]: Finished difference Result 3250 states and 9460 transitions. [2021-03-10 21:38:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:38:20,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:20,280 INFO L225 Difference]: With dead ends: 3250 [2021-03-10 21:38:20,280 INFO L226 Difference]: Without dead ends: 3240 [2021-03-10 21:38:20,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1417.2ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:38:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-03-10 21:38:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2965. [2021-03-10 21:38:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-03-10 21:38:20,309 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-03-10 21:38:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:20,309 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-03-10 21:38:20,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-03-10 21:38:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:20,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:20,311 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:20,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57851,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:20,512 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash -536487783, now seen corresponding path program 449 times [2021-03-10 21:38:20,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:20,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437536970] [2021-03-10 21:38:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:20,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437536970] [2021-03-10 21:38:20,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041266146] [2021-03-10 21:38:20,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:20,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:38:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:20,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:21,288 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:21,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:21,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:22,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:22,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:22,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:38:22,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:38:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:22,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:22,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:38:22,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735470353] [2021-03-10 21:38:22,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:38:22,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:38:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:38:22,128 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:22,984 INFO L93 Difference]: Finished difference Result 3016 states and 8861 transitions. [2021-03-10 21:38:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:38:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:22,988 INFO L225 Difference]: With dead ends: 3016 [2021-03-10 21:38:22,988 INFO L226 Difference]: Without dead ends: 2990 [2021-03-10 21:38:22,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:38:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-03-10 21:38:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2965. [2021-03-10 21:38:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9612010796221324) internal successors, (8777), 2964 states have internal predecessors, (8777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8777 transitions. [2021-03-10 21:38:23,016 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8777 transitions. Word has length 22 [2021-03-10 21:38:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:23,016 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8777 transitions. [2021-03-10 21:38:23,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8777 transitions. [2021-03-10 21:38:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:23,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:23,018 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:23,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58565 [2021-03-10 21:38:23,219 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:23,219 INFO L82 PathProgramCache]: Analyzing trace with hash -468172775, now seen corresponding path program 450 times [2021-03-10 21:38:23,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:23,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212653111] [2021-03-10 21:38:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:23,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212653111] [2021-03-10 21:38:23,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252756333] [2021-03-10 21:38:23,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:23,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:38:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:23,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:24,013 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:24,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:24,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:24,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:25,099 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:25,103 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:25,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:25,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:25,731 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:25,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:25,732 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:25,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:25,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:38:25,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982360955] [2021-03-10 21:38:25,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:38:25,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:38:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:38:25,797 INFO L87 Difference]: Start difference. First operand 2965 states and 8777 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:27,934 INFO L93 Difference]: Finished difference Result 3832 states and 11188 transitions. [2021-03-10 21:38:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:38:27,936 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:27,940 INFO L225 Difference]: With dead ends: 3832 [2021-03-10 21:38:27,941 INFO L226 Difference]: Without dead ends: 3822 [2021-03-10 21:38:27,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1726.4ms TimeCoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:38:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-03-10 21:38:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2972. [2021-03-10 21:38:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 2.9619656681252104) internal successors, (8800), 2971 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 8800 transitions. [2021-03-10 21:38:27,972 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 8800 transitions. Word has length 22 [2021-03-10 21:38:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:27,972 INFO L480 AbstractCegarLoop]: Abstraction has 2972 states and 8800 transitions. [2021-03-10 21:38:27,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 8800 transitions. [2021-03-10 21:38:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:27,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:27,974 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:28,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58907 [2021-03-10 21:38:28,175 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash -682746697, now seen corresponding path program 451 times [2021-03-10 21:38:28,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:28,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721526462] [2021-03-10 21:38:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:28,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721526462] [2021-03-10 21:38:28,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136366256] [2021-03-10 21:38:28,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:28,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:28,913 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:28,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:28,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:29,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:29,983 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:29,983 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:29,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:31,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:31,603 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:31,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:31,604 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:31,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:31,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:38:31,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771633580] [2021-03-10 21:38:31,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:38:31,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:31,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:38:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:38:31,647 INFO L87 Difference]: Start difference. First operand 2972 states and 8800 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:33,910 INFO L93 Difference]: Finished difference Result 3762 states and 10747 transitions. [2021-03-10 21:38:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:38:33,910 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:33,915 INFO L225 Difference]: With dead ends: 3762 [2021-03-10 21:38:33,915 INFO L226 Difference]: Without dead ends: 3707 [2021-03-10 21:38:33,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1521.5ms TimeCoverageRelationStatistics Valid=499, Invalid=4057, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:38:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2021-03-10 21:38:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2980. [2021-03-10 21:38:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 2.959718026183283) internal successors, (8817), 2979 states have internal predecessors, (8817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8817 transitions. [2021-03-10 21:38:33,947 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8817 transitions. Word has length 22 [2021-03-10 21:38:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:33,947 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 8817 transitions. [2021-03-10 21:38:33,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8817 transitions. [2021-03-10 21:38:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:33,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:33,950 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:34,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59326 [2021-03-10 21:38:34,150 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:34,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1755832077, now seen corresponding path program 452 times [2021-03-10 21:38:34,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:34,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443912520] [2021-03-10 21:38:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:34,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443912520] [2021-03-10 21:38:34,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088472976] [2021-03-10 21:38:34,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:34,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:38:34,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:34,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:34,907 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:34,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:34,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:35,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:36,030 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:36,030 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:36,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:36,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:36,381 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:36,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:36,382 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:36,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:36,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:38:36,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396279867] [2021-03-10 21:38:36,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:38:36,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:36,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:38:36,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:38:36,429 INFO L87 Difference]: Start difference. First operand 2980 states and 8817 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:38,878 INFO L93 Difference]: Finished difference Result 3987 states and 11396 transitions. [2021-03-10 21:38:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 21:38:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:38,884 INFO L225 Difference]: With dead ends: 3987 [2021-03-10 21:38:38,885 INFO L226 Difference]: Without dead ends: 3932 [2021-03-10 21:38:38,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1910.6ms TimeCoverageRelationStatistics Valid=575, Invalid=4681, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:38:38,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-03-10 21:38:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2986. [2021-03-10 21:38:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 2.9591289782244554) internal successors, (8833), 2985 states have internal predecessors, (8833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 8833 transitions. [2021-03-10 21:38:38,920 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 8833 transitions. Word has length 22 [2021-03-10 21:38:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:38,921 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 8833 transitions. [2021-03-10 21:38:38,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 8833 transitions. [2021-03-10 21:38:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:38,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:38,923 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:39,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60009 [2021-03-10 21:38:39,124 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:39,124 INFO L82 PathProgramCache]: Analyzing trace with hash -661740489, now seen corresponding path program 453 times [2021-03-10 21:38:39,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:39,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739147136] [2021-03-10 21:38:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:39,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739147136] [2021-03-10 21:38:39,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941809541] [2021-03-10 21:38:39,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:39,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:38:39,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:39,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:39,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:40,042 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:40,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:41,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:41,435 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:41,436 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:41,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:43,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:43,715 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:43,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:43,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:43,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:43,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:38:43,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330411997] [2021-03-10 21:38:43,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:38:43,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:38:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:38:43,761 INFO L87 Difference]: Start difference. First operand 2986 states and 8833 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:45,823 INFO L93 Difference]: Finished difference Result 3474 states and 10057 transitions. [2021-03-10 21:38:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:38:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:45,828 INFO L225 Difference]: With dead ends: 3474 [2021-03-10 21:38:45,828 INFO L226 Difference]: Without dead ends: 3459 [2021-03-10 21:38:45,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1671.0ms TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:38:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2021-03-10 21:38:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3009. [2021-03-10 21:38:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.95844414893617) internal successors, (8899), 3008 states have internal predecessors, (8899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8899 transitions. [2021-03-10 21:38:45,859 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8899 transitions. Word has length 22 [2021-03-10 21:38:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:45,859 INFO L480 AbstractCegarLoop]: Abstraction has 3009 states and 8899 transitions. [2021-03-10 21:38:45,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8899 transitions. [2021-03-10 21:38:45,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:45,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:45,862 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:46,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60405 [2021-03-10 21:38:46,063 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:46,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1104639629, now seen corresponding path program 454 times [2021-03-10 21:38:46,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:46,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243692511] [2021-03-10 21:38:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:46,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243692511] [2021-03-10 21:38:46,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907240295] [2021-03-10 21:38:46,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:46,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:38:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:46,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:46,947 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:46,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:46,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:50,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:50,763 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:50,764 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:50,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:51,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:51,774 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:51,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:51,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:51,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:51,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:38:51,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710380836] [2021-03-10 21:38:51,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:38:51,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:51,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:38:51,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:38:51,822 INFO L87 Difference]: Start difference. First operand 3009 states and 8899 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:53,647 INFO L93 Difference]: Finished difference Result 3621 states and 10478 transitions. [2021-03-10 21:38:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:38:53,649 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:53,653 INFO L225 Difference]: With dead ends: 3621 [2021-03-10 21:38:53,653 INFO L226 Difference]: Without dead ends: 3606 [2021-03-10 21:38:53,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1671.1ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:38:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-03-10 21:38:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3017. [2021-03-10 21:38:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-03-10 21:38:53,687 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-03-10 21:38:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:53,687 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-03-10 21:38:53,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-03-10 21:38:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:53,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:53,689 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:53,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61367,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:53,890 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1949611081, now seen corresponding path program 455 times [2021-03-10 21:38:53,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:53,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105756513] [2021-03-10 21:38:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105756513] [2021-03-10 21:38:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482271590] [2021-03-10 21:38:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:54,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:38:54,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:54,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:54,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:54,838 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:54,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:54,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:55,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:56,184 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:56,185 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:56,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:57,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:57,144 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:57,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:57,146 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:38:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:57,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:57,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:38:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518198765] [2021-03-10 21:38:57,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:38:57,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:57,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:38:57,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:38:57,199 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:58,860 INFO L93 Difference]: Finished difference Result 3506 states and 10182 transitions. [2021-03-10 21:38:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:38:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:38:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:58,865 INFO L225 Difference]: With dead ends: 3506 [2021-03-10 21:38:58,865 INFO L226 Difference]: Without dead ends: 3496 [2021-03-10 21:38:58,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1659.5ms TimeCoverageRelationStatistics Valid=340, Invalid=2522, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:38:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-03-10 21:38:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3017. [2021-03-10 21:38:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-03-10 21:38:58,895 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-03-10 21:38:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:58,895 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-03-10 21:38:58,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-03-10 21:38:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:58,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:58,898 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:59,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62567,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:59,098 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1255070853, now seen corresponding path program 456 times [2021-03-10 21:38:59,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:59,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538510948] [2021-03-10 21:38:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:59,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538510948] [2021-03-10 21:38:59,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378858752] [2021-03-10 21:38:59,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:59,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:38:59,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:59,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:59,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:00,067 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:00,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:02,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:02,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:02,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:39:02,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:39:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:02,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:02,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:39:02,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406371845] [2021-03-10 21:39:02,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:39:02,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:02,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:39:02,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:39:02,439 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:03,297 INFO L93 Difference]: Finished difference Result 3058 states and 8994 transitions. [2021-03-10 21:39:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:39:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:03,302 INFO L225 Difference]: With dead ends: 3058 [2021-03-10 21:39:03,302 INFO L226 Difference]: Without dead ends: 3036 [2021-03-10 21:39:03,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 816.5ms TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:39:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-03-10 21:39:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3017. [2021-03-10 21:39:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9602122015915118) internal successors, (8928), 3016 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8928 transitions. [2021-03-10 21:39:03,331 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8928 transitions. Word has length 22 [2021-03-10 21:39:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:03,331 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8928 transitions. [2021-03-10 21:39:03,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8928 transitions. [2021-03-10 21:39:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:03,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:03,333 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:03,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63181 [2021-03-10 21:39:03,534 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:03,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:03,534 INFO L82 PathProgramCache]: Analyzing trace with hash 634823837, now seen corresponding path program 457 times [2021-03-10 21:39:03,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:03,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187622868] [2021-03-10 21:39:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:39:03,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187622868] [2021-03-10 21:39:03,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819910886] [2021-03-10 21:39:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:03,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:04,339 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:04,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:04,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:05,234 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:05,235 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:05,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:05,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:05,829 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:05,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:05,830 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:05,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:05,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:39:05,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087456541] [2021-03-10 21:39:05,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:39:05,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:39:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:39:05,884 INFO L87 Difference]: Start difference. First operand 3017 states and 8928 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:08,343 INFO L93 Difference]: Finished difference Result 4229 states and 12230 transitions. [2021-03-10 21:39:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:39:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:08,349 INFO L225 Difference]: With dead ends: 4229 [2021-03-10 21:39:08,350 INFO L226 Difference]: Without dead ends: 4200 [2021-03-10 21:39:08,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2031.7ms TimeCoverageRelationStatistics Valid=501, Invalid=4055, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:39:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-03-10 21:39:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3101. [2021-03-10 21:39:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 2.963225806451613) internal successors, (9186), 3100 states have internal predecessors, (9186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9186 transitions. [2021-03-10 21:39:08,387 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9186 transitions. Word has length 22 [2021-03-10 21:39:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:08,388 INFO L480 AbstractCegarLoop]: Abstraction has 3101 states and 9186 transitions. [2021-03-10 21:39:08,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9186 transitions. [2021-03-10 21:39:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:08,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:08,390 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:08,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63966 [2021-03-10 21:39:08,590 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash 191924697, now seen corresponding path program 458 times [2021-03-10 21:39:08,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:08,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654458821] [2021-03-10 21:39:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654458821] [2021-03-10 21:39:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841868784] [2021-03-10 21:39:08,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:08,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:39:08,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:08,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:08,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:09,530 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:09,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:09,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:10,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:10,442 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:10,443 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:10,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:12,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:12,913 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:12,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:12,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:12,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:12,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:39:12,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458204629] [2021-03-10 21:39:12,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:39:12,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:12,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:39:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:39:12,963 INFO L87 Difference]: Start difference. First operand 3101 states and 9186 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:15,871 INFO L93 Difference]: Finished difference Result 4434 states and 12923 transitions. [2021-03-10 21:39:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:39:15,872 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:15,877 INFO L225 Difference]: With dead ends: 4434 [2021-03-10 21:39:15,877 INFO L226 Difference]: Without dead ends: 4399 [2021-03-10 21:39:15,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2284.9ms TimeCoverageRelationStatistics Valid=450, Invalid=3456, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 21:39:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2021-03-10 21:39:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 2998. [2021-03-10 21:39:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 2.960960960960961) internal successors, (8874), 2997 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 8874 transitions. [2021-03-10 21:39:15,917 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 8874 transitions. Word has length 22 [2021-03-10 21:39:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:15,917 INFO L480 AbstractCegarLoop]: Abstraction has 2998 states and 8874 transitions. [2021-03-10 21:39:15,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 8874 transitions. [2021-03-10 21:39:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:15,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:15,920 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:16,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64382 [2021-03-10 21:39:16,120 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash -653046755, now seen corresponding path program 459 times [2021-03-10 21:39:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:16,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744428413] [2021-03-10 21:39:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:16,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744428413] [2021-03-10 21:39:16,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744746497] [2021-03-10 21:39:16,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:16,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:39:16,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:16,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:17,353 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:17,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:17,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:18,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:18,565 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:18,566 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:18,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:19,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:19,517 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:19,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:19,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:19,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:19,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:39:19,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012186249] [2021-03-10 21:39:19,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:39:19,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:39:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:39:19,582 INFO L87 Difference]: Start difference. First operand 2998 states and 8874 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:21,512 INFO L93 Difference]: Finished difference Result 3726 states and 10821 transitions. [2021-03-10 21:39:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:39:21,514 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:21,518 INFO L225 Difference]: With dead ends: 3726 [2021-03-10 21:39:21,518 INFO L226 Difference]: Without dead ends: 3716 [2021-03-10 21:39:21,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1982.3ms TimeCoverageRelationStatistics Valid=355, Invalid=2725, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:39:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-03-10 21:39:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3003. [2021-03-10 21:39:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.9610259826782146) internal successors, (8889), 3002 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8889 transitions. [2021-03-10 21:39:21,551 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8889 transitions. Word has length 22 [2021-03-10 21:39:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:21,552 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 8889 transitions. [2021-03-10 21:39:21,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8889 transitions. [2021-03-10 21:39:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:21,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:21,554 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:21,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65352 [2021-03-10 21:39:21,755 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash -169872295, now seen corresponding path program 460 times [2021-03-10 21:39:21,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:21,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663838408] [2021-03-10 21:39:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:21,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663838408] [2021-03-10 21:39:21,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479176163] [2021-03-10 21:39:21,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:21,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:39:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:21,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:22,743 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:22,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:22,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:23,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:23,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:23,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:39:23,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:39:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:23,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:23,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:39:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691040006] [2021-03-10 21:39:23,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:39:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:39:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:39:23,894 INFO L87 Difference]: Start difference. First operand 3003 states and 8889 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:24,996 INFO L93 Difference]: Finished difference Result 3030 states and 8931 transitions. [2021-03-10 21:39:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:39:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:25,001 INFO L225 Difference]: With dead ends: 3030 [2021-03-10 21:39:25,001 INFO L226 Difference]: Without dead ends: 3012 [2021-03-10 21:39:25,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:39:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-03-10 21:39:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 3003. [2021-03-10 21:39:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.960359760159893) internal successors, (8887), 3002 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8887 transitions. [2021-03-10 21:39:25,030 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8887 transitions. Word has length 22 [2021-03-10 21:39:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:25,030 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 8887 transitions. [2021-03-10 21:39:25,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8887 transitions. [2021-03-10 21:39:25,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:25,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:25,032 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:25,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65858 [2021-03-10 21:39:25,233 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1882629879, now seen corresponding path program 461 times [2021-03-10 21:39:25,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:25,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606400362] [2021-03-10 21:39:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:25,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606400362] [2021-03-10 21:39:25,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199328560] [2021-03-10 21:39:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:25,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:39:25,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:25,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:26,301 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:26,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:27,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:27,487 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:27,488 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:27,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:28,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:28,087 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:28,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:28,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:28,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:28,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:39:28,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601975643] [2021-03-10 21:39:28,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:39:28,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:39:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:39:28,143 INFO L87 Difference]: Start difference. First operand 3003 states and 8887 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:30,488 INFO L93 Difference]: Finished difference Result 3530 states and 10303 transitions. [2021-03-10 21:39:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:39:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:30,493 INFO L225 Difference]: With dead ends: 3530 [2021-03-10 21:39:30,493 INFO L226 Difference]: Without dead ends: 3520 [2021-03-10 21:39:30,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2205.1ms TimeCoverageRelationStatistics Valid=421, Invalid=3001, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:39:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2021-03-10 21:39:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 3073. [2021-03-10 21:39:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 3072 states have (on average 2.9619140625) internal successors, (9099), 3072 states have internal predecessors, (9099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 9099 transitions. [2021-03-10 21:39:30,525 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 9099 transitions. Word has length 22 [2021-03-10 21:39:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:30,525 INFO L480 AbstractCegarLoop]: Abstraction has 3073 states and 9099 transitions. [2021-03-10 21:39:30,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 9099 transitions. [2021-03-10 21:39:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:30,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:30,528 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:30,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66160 [2021-03-10 21:39:30,728 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 834965435, now seen corresponding path program 462 times [2021-03-10 21:39:30,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:30,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966717799] [2021-03-10 21:39:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:30,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966717799] [2021-03-10 21:39:30,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414175582] [2021-03-10 21:39:30,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:30,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:39:30,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:30,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:31,707 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:31,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:31,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:32,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:32,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:32,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:39:32,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:39:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:32,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:32,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:39:32,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582467446] [2021-03-10 21:39:32,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:39:32,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:32,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:39:32,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:39:32,469 INFO L87 Difference]: Start difference. First operand 3073 states and 9099 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:33,841 INFO L93 Difference]: Finished difference Result 3616 states and 10700 transitions. [2021-03-10 21:39:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:39:33,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:33,846 INFO L225 Difference]: With dead ends: 3616 [2021-03-10 21:39:33,846 INFO L226 Difference]: Without dead ends: 3600 [2021-03-10 21:39:33,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:39:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-03-10 21:39:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3562. [2021-03-10 21:39:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 2.974726200505476) internal successors, (10593), 3561 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 10593 transitions. [2021-03-10 21:39:33,884 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 10593 transitions. Word has length 22 [2021-03-10 21:39:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:33,884 INFO L480 AbstractCegarLoop]: Abstraction has 3562 states and 10593 transitions. [2021-03-10 21:39:33,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 10593 transitions. [2021-03-10 21:39:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:33,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:33,887 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:34,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66591,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:34,088 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:34,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1693839965, now seen corresponding path program 463 times [2021-03-10 21:39:34,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:34,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250864784] [2021-03-10 21:39:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:34,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250864784] [2021-03-10 21:39:34,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604695624] [2021-03-10 21:39:34,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:34,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:34,968 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:34,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:35,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:35,854 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:35,855 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:35,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:36,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:36,465 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:36,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:36,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:36,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:36,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:39:36,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785565609] [2021-03-10 21:39:36,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:39:36,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:36,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:39:36,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:39:36,513 INFO L87 Difference]: Start difference. First operand 3562 states and 10593 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:39,525 INFO L93 Difference]: Finished difference Result 3947 states and 11563 transitions. [2021-03-10 21:39:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 21:39:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:39,531 INFO L225 Difference]: With dead ends: 3947 [2021-03-10 21:39:39,531 INFO L226 Difference]: Without dead ends: 3909 [2021-03-10 21:39:39,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1874.7ms TimeCoverageRelationStatistics Valid=383, Invalid=3777, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 21:39:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-03-10 21:39:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3568. [2021-03-10 21:39:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3567 states have (on average 2.976170451359686) internal successors, (10616), 3567 states have internal predecessors, (10616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 10616 transitions. [2021-03-10 21:39:39,571 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 10616 transitions. Word has length 22 [2021-03-10 21:39:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:39,571 INFO L480 AbstractCegarLoop]: Abstraction has 3568 states and 10616 transitions. [2021-03-10 21:39:39,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 10616 transitions. [2021-03-10 21:39:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:39,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:39,575 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:39,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66828 [2021-03-10 21:39:39,775 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash -890514023, now seen corresponding path program 464 times [2021-03-10 21:39:39,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:39,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267955089] [2021-03-10 21:39:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:39:40,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267955089] [2021-03-10 21:39:40,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22781935] [2021-03-10 21:39:40,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:40,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:39:40,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:40,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:40,818 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:40,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:40,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:42,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:42,526 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:42,526 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:43,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:43,625 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:43,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:43,626 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:43,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:43,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:39:43,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708610110] [2021-03-10 21:39:43,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:39:43,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:39:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:39:43,683 INFO L87 Difference]: Start difference. First operand 3568 states and 10616 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:45,796 INFO L93 Difference]: Finished difference Result 4191 states and 12335 transitions. [2021-03-10 21:39:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:39:45,797 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:45,802 INFO L225 Difference]: With dead ends: 4191 [2021-03-10 21:39:45,802 INFO L226 Difference]: Without dead ends: 4181 [2021-03-10 21:39:45,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1396.9ms TimeCoverageRelationStatistics Valid=262, Invalid=2708, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:39:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-03-10 21:39:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3738. [2021-03-10 21:39:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.98019801980198) internal successors, (11137), 3737 states have internal predecessors, (11137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 11137 transitions. [2021-03-10 21:39:45,841 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 11137 transitions. Word has length 22 [2021-03-10 21:39:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:45,841 INFO L480 AbstractCegarLoop]: Abstraction has 3738 states and 11137 transitions. [2021-03-10 21:39:45,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 11137 transitions. [2021-03-10 21:39:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:45,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:45,844 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:46,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67185,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:46,045 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash 598890973, now seen corresponding path program 465 times [2021-03-10 21:39:46,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:46,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165180323] [2021-03-10 21:39:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:46,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165180323] [2021-03-10 21:39:46,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103890461] [2021-03-10 21:39:46,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:46,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:39:46,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:46,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:46,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:46,822 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:46,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:47,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:47,712 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:47,712 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:47,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:48,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:48,361 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:48,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:48,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:48,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:48,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:39:48,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894932858] [2021-03-10 21:39:48,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:39:48,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:39:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:39:48,420 INFO L87 Difference]: Start difference. First operand 3738 states and 11137 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:51,609 INFO L93 Difference]: Finished difference Result 4542 states and 13216 transitions. [2021-03-10 21:39:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:39:51,611 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:51,617 INFO L225 Difference]: With dead ends: 4542 [2021-03-10 21:39:51,617 INFO L226 Difference]: Without dead ends: 4508 [2021-03-10 21:39:51,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1952.0ms TimeCoverageRelationStatistics Valid=405, Invalid=3885, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:39:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-03-10 21:39:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 3743. [2021-03-10 21:39:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3742 states have (on average 2.980224478888295) internal successors, (11152), 3742 states have internal predecessors, (11152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 11152 transitions. [2021-03-10 21:39:51,664 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 11152 transitions. Word has length 22 [2021-03-10 21:39:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:51,664 INFO L480 AbstractCegarLoop]: Abstraction has 3743 states and 11152 transitions. [2021-03-10 21:39:51,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 11152 transitions. [2021-03-10 21:39:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:51,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:51,667 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:51,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67834,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:51,868 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:51,868 INFO L82 PathProgramCache]: Analyzing trace with hash -474194407, now seen corresponding path program 466 times [2021-03-10 21:39:51,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:51,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452618019] [2021-03-10 21:39:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:39:52,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452618019] [2021-03-10 21:39:52,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198186463] [2021-03-10 21:39:52,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:52,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:39:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:52,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:52,974 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:52,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:52,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:53,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:54,108 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:54,108 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:54,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:55,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:55,315 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:55,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:55,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:39:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:55,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:55,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:39:55,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968049631] [2021-03-10 21:39:55,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:39:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:39:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:39:55,392 INFO L87 Difference]: Start difference. First operand 3743 states and 11152 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:57,903 INFO L93 Difference]: Finished difference Result 4115 states and 12062 transitions. [2021-03-10 21:39:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:39:57,904 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:39:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:57,909 INFO L225 Difference]: With dead ends: 4115 [2021-03-10 21:39:57,909 INFO L226 Difference]: Without dead ends: 4100 [2021-03-10 21:39:57,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2163.4ms TimeCoverageRelationStatistics Valid=386, Invalid=3154, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:39:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-03-10 21:39:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3823. [2021-03-10 21:39:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 2.980638409209838) internal successors, (11392), 3822 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 11392 transitions. [2021-03-10 21:39:57,952 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 11392 transitions. Word has length 22 [2021-03-10 21:39:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:57,952 INFO L480 AbstractCegarLoop]: Abstraction has 3823 states and 11392 transitions. [2021-03-10 21:39:57,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 11392 transitions. [2021-03-10 21:39:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:57,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:57,956 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:58,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68209 [2021-03-10 21:39:58,156 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash 619897181, now seen corresponding path program 467 times [2021-03-10 21:39:58,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:58,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324347282] [2021-03-10 21:39:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324347282] [2021-03-10 21:39:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11998091] [2021-03-10 21:39:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:58,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:39:58,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:58,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:58,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:58,995 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:58,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:58,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:00,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:01,025 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:01,025 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:01,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:03,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:03,648 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:03,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:03,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:40:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:03,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:03,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:40:03,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784977632] [2021-03-10 21:40:03,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:40:03,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:40:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:03,723 INFO L87 Difference]: Start difference. First operand 3823 states and 11392 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:07,140 INFO L93 Difference]: Finished difference Result 4266 states and 12418 transitions. [2021-03-10 21:40:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:40:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:07,147 INFO L225 Difference]: With dead ends: 4266 [2021-03-10 21:40:07,147 INFO L226 Difference]: Without dead ends: 4241 [2021-03-10 21:40:07,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 2658.6ms TimeCoverageRelationStatistics Valid=550, Invalid=4280, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:40:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-03-10 21:40:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3827. [2021-03-10 21:40:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 2.979874542603241) internal successors, (11401), 3826 states have internal predecessors, (11401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:07,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 11401 transitions. [2021-03-10 21:40:07,190 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 11401 transitions. Word has length 22 [2021-03-10 21:40:07,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:07,190 INFO L480 AbstractCegarLoop]: Abstraction has 3827 states and 11401 transitions. [2021-03-10 21:40:07,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:07,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 11401 transitions. [2021-03-10 21:40:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:07,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:07,193 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:07,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68703,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:07,393 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:07,394 INFO L82 PathProgramCache]: Analyzing trace with hash 176998041, now seen corresponding path program 468 times [2021-03-10 21:40:07,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:07,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347263129] [2021-03-10 21:40:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:40:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347263129] [2021-03-10 21:40:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307543259] [2021-03-10 21:40:07,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:07,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:40:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:07,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:08,513 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:08,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:08,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:10,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:11,002 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:11,003 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:11,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:12,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:12,459 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:12,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:12,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:40:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:12,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:12,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:40:12,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240774034] [2021-03-10 21:40:12,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:40:12,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:12,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:40:12,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:12,509 INFO L87 Difference]: Start difference. First operand 3827 states and 11401 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:14,729 INFO L93 Difference]: Finished difference Result 4070 states and 11961 transitions. [2021-03-10 21:40:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:40:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:14,736 INFO L225 Difference]: With dead ends: 4070 [2021-03-10 21:40:14,736 INFO L226 Difference]: Without dead ends: 4055 [2021-03-10 21:40:14,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 2110.7ms TimeCoverageRelationStatistics Valid=406, Invalid=2786, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:40:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-03-10 21:40:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3835. [2021-03-10 21:40:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 2.979134063641106) internal successors, (11422), 3834 states have internal predecessors, (11422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 11422 transitions. [2021-03-10 21:40:14,779 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 11422 transitions. Word has length 22 [2021-03-10 21:40:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:14,779 INFO L480 AbstractCegarLoop]: Abstraction has 3835 states and 11422 transitions. [2021-03-10 21:40:14,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 11422 transitions. [2021-03-10 21:40:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:14,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:14,782 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:14,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69843,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:14,983 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -667973411, now seen corresponding path program 469 times [2021-03-10 21:40:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:14,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914066126] [2021-03-10 21:40:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:15,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914066126] [2021-03-10 21:40:15,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914438988] [2021-03-10 21:40:15,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:15,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:15,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:16,266 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:16,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:16,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:17,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:17,566 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:17,566 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:17,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:18,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:18,508 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:18,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:18,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:40:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:18,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:18,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:40:18,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302751538] [2021-03-10 21:40:18,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:40:18,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:18,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:40:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:40:18,579 INFO L87 Difference]: Start difference. First operand 3835 states and 11422 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:21,175 INFO L93 Difference]: Finished difference Result 4162 states and 12188 transitions. [2021-03-10 21:40:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:40:21,176 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:21,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:21,181 INFO L225 Difference]: With dead ends: 4162 [2021-03-10 21:40:21,181 INFO L226 Difference]: Without dead ends: 4147 [2021-03-10 21:40:21,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2397.1ms TimeCoverageRelationStatistics Valid=388, Invalid=2692, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:40:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-03-10 21:40:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3837. [2021-03-10 21:40:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.980187695516163) internal successors, (11432), 3836 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11432 transitions. [2021-03-10 21:40:21,223 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11432 transitions. Word has length 22 [2021-03-10 21:40:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:21,223 INFO L480 AbstractCegarLoop]: Abstraction has 3837 states and 11432 transitions. [2021-03-10 21:40:21,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11432 transitions. [2021-03-10 21:40:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:21,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:21,227 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:21,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70781,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:21,427 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1092284647, now seen corresponding path program 470 times [2021-03-10 21:40:21,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:21,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797552306] [2021-03-10 21:40:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:21,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797552306] [2021-03-10 21:40:21,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703936413] [2021-03-10 21:40:21,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:21,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:40:21,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:21,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:21,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:22,851 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:22,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:22,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:23,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:24,361 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:24,362 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:24,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:24,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:25,003 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:25,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:25,005 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:40:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:25,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:25,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:40:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522952417] [2021-03-10 21:40:25,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:40:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:40:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:40:25,075 INFO L87 Difference]: Start difference. First operand 3837 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:26,820 INFO L93 Difference]: Finished difference Result 4061 states and 11974 transitions. [2021-03-10 21:40:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:40:26,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:26,827 INFO L225 Difference]: With dead ends: 4061 [2021-03-10 21:40:26,827 INFO L226 Difference]: Without dead ends: 4056 [2021-03-10 21:40:26,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2083.9ms TimeCoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:40:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2021-03-10 21:40:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 3837. [2021-03-10 21:40:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.980187695516163) internal successors, (11432), 3836 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11432 transitions. [2021-03-10 21:40:26,869 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11432 transitions. Word has length 22 [2021-03-10 21:40:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:26,869 INFO L480 AbstractCegarLoop]: Abstraction has 3837 states and 11432 transitions. [2021-03-10 21:40:26,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11432 transitions. [2021-03-10 21:40:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:26,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:26,873 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:27,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71248,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:27,073 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -888472465, now seen corresponding path program 471 times [2021-03-10 21:40:27,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:27,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386700556] [2021-03-10 21:40:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:27,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386700556] [2021-03-10 21:40:27,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680713568] [2021-03-10 21:40:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:27,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:40:27,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:27,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:28,330 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:28,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:28,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:28,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:28,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:28,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:40:28,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:40:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:28,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:28,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:40:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915552581] [2021-03-10 21:40:28,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:40:28,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:40:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:40:28,831 INFO L87 Difference]: Start difference. First operand 3837 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:30,246 INFO L93 Difference]: Finished difference Result 3926 states and 11589 transitions. [2021-03-10 21:40:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:40:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:30,252 INFO L225 Difference]: With dead ends: 3926 [2021-03-10 21:40:30,252 INFO L226 Difference]: Without dead ends: 3892 [2021-03-10 21:40:30,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1218.0ms TimeCoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:40:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-03-10 21:40:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3837. [2021-03-10 21:40:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.9770594369134513) internal successors, (11420), 3836 states have internal predecessors, (11420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11420 transitions. [2021-03-10 21:40:30,296 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11420 transitions. Word has length 22 [2021-03-10 21:40:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:30,296 INFO L480 AbstractCegarLoop]: Abstraction has 3837 states and 11420 transitions. [2021-03-10 21:40:30,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11420 transitions. [2021-03-10 21:40:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:30,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:30,299 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:30,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71642 [2021-03-10 21:40:30,500 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:30,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1530645197, now seen corresponding path program 472 times [2021-03-10 21:40:30,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:30,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256663661] [2021-03-10 21:40:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:30,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256663661] [2021-03-10 21:40:30,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126572017] [2021-03-10 21:40:30,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:30,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:40:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:30,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:31,733 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:31,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:31,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:33,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:34,235 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:34,236 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:34,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:36,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:36,552 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:36,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:36,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:40:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:36,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:36,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:40:36,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976087130] [2021-03-10 21:40:36,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:40:36,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:36,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:40:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:40:36,622 INFO L87 Difference]: Start difference. First operand 3837 states and 11420 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:39,328 INFO L93 Difference]: Finished difference Result 5195 states and 15297 transitions. [2021-03-10 21:40:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:40:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:39,335 INFO L225 Difference]: With dead ends: 5195 [2021-03-10 21:40:39,335 INFO L226 Difference]: Without dead ends: 5185 [2021-03-10 21:40:39,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2626.6ms TimeCoverageRelationStatistics Valid=452, Invalid=3454, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 21:40:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-03-10 21:40:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 3835. [2021-03-10 21:40:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 2.9770474700052163) internal successors, (11414), 3834 states have internal predecessors, (11414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 11414 transitions. [2021-03-10 21:40:39,385 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 11414 transitions. Word has length 22 [2021-03-10 21:40:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:39,385 INFO L480 AbstractCegarLoop]: Abstraction has 3835 states and 11414 transitions. [2021-03-10 21:40:39,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:39,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 11414 transitions. [2021-03-10 21:40:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:39,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:39,388 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:39,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71817,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:39,589 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash -826179089, now seen corresponding path program 473 times [2021-03-10 21:40:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:39,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772156484] [2021-03-10 21:40:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:40:39,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772156484] [2021-03-10 21:40:39,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116246062] [2021-03-10 21:40:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:39,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:40:39,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:39,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:39,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:40,608 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:40,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:40,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:41,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:42,120 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:42,121 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:42,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:43,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:44,017 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:44,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:44,018 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:40:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:44,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:44,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:40:44,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229202148] [2021-03-10 21:40:44,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:40:44,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:40:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:40:44,083 INFO L87 Difference]: Start difference. First operand 3835 states and 11414 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:47,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:47,136 INFO L93 Difference]: Finished difference Result 4678 states and 13584 transitions. [2021-03-10 21:40:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:40:47,138 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:47,144 INFO L225 Difference]: With dead ends: 4678 [2021-03-10 21:40:47,144 INFO L226 Difference]: Without dead ends: 4651 [2021-03-10 21:40:47,144 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2366.1ms TimeCoverageRelationStatistics Valid=505, Invalid=4465, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 21:40:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-03-10 21:40:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3854. [2021-03-10 21:40:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 3853 states have (on average 2.9774201920581365) internal successors, (11472), 3853 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 11472 transitions. [2021-03-10 21:40:47,189 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 11472 transitions. Word has length 22 [2021-03-10 21:40:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:47,189 INFO L480 AbstractCegarLoop]: Abstraction has 3854 states and 11472 transitions. [2021-03-10 21:40:47,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 11472 transitions. [2021-03-10 21:40:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:47,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:47,193 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:47,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72823 [2021-03-10 21:40:47,393 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 267912499, now seen corresponding path program 474 times [2021-03-10 21:40:47,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:47,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126979699] [2021-03-10 21:40:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:47,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126979699] [2021-03-10 21:40:47,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831650283] [2021-03-10 21:40:47,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:47,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:40:47,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:47,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:48,664 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:48,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:48,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:49,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:50,184 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:50,185 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:51,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:51,477 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:51,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:51,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:40:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:51,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:51,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:40:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255984611] [2021-03-10 21:40:51,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:40:51,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:51,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:40:51,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:51,567 INFO L87 Difference]: Start difference. First operand 3854 states and 11472 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:55,380 INFO L93 Difference]: Finished difference Result 4897 states and 14197 transitions. [2021-03-10 21:40:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 21:40:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:40:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:55,386 INFO L225 Difference]: With dead ends: 4897 [2021-03-10 21:40:55,386 INFO L226 Difference]: Without dead ends: 4858 [2021-03-10 21:40:55,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 3212.8ms TimeCoverageRelationStatistics Valid=656, Invalid=5506, Unknown=0, NotChecked=0, Total=6162 [2021-03-10 21:40:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-03-10 21:40:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 3873. [2021-03-10 21:40:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.977789256198347) internal successors, (11530), 3872 states have internal predecessors, (11530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 11530 transitions. [2021-03-10 21:40:55,431 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 11530 transitions. Word has length 22 [2021-03-10 21:40:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:55,431 INFO L480 AbstractCegarLoop]: Abstraction has 3873 states and 11530 transitions. [2021-03-10 21:40:55,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 11530 transitions. [2021-03-10 21:40:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:55,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:55,434 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:55,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73508,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:55,634 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:55,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:55,634 INFO L82 PathProgramCache]: Analyzing trace with hash -174986641, now seen corresponding path program 475 times [2021-03-10 21:40:55,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:55,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416956107] [2021-03-10 21:40:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:40:55,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416956107] [2021-03-10 21:40:55,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424131968] [2021-03-10 21:40:55,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:55,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:55,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:56,687 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:56,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:56,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:00,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:00,654 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:00,654 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:00,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:02,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:02,198 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:02,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:02,200 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:41:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:02,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:02,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:41:02,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835637992] [2021-03-10 21:41:02,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:41:02,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:41:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:41:02,291 INFO L87 Difference]: Start difference. First operand 3873 states and 11530 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:05,530 INFO L93 Difference]: Finished difference Result 4322 states and 12624 transitions. [2021-03-10 21:41:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:41:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:05,536 INFO L225 Difference]: With dead ends: 4322 [2021-03-10 21:41:05,537 INFO L226 Difference]: Without dead ends: 4307 [2021-03-10 21:41:05,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2641.6ms TimeCoverageRelationStatistics Valid=468, Invalid=3314, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:41:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2021-03-10 21:41:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 3890. [2021-03-10 21:41:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.977114939573155) internal successors, (11578), 3889 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11578 transitions. [2021-03-10 21:41:05,578 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11578 transitions. Word has length 22 [2021-03-10 21:41:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:05,578 INFO L480 AbstractCegarLoop]: Abstraction has 3890 states and 11578 transitions. [2021-03-10 21:41:05,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11578 transitions. [2021-03-10 21:41:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:05,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:05,582 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:05,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74106 [2021-03-10 21:41:05,782 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:05,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:05,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1019958093, now seen corresponding path program 476 times [2021-03-10 21:41:05,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:05,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283480957] [2021-03-10 21:41:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:06,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283480957] [2021-03-10 21:41:06,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821236558] [2021-03-10 21:41:06,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:06,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:41:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:06,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:06,849 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:06,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:06,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:07,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:07,967 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:07,968 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:07,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:09,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:09,398 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:09,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:09,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:41:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:09,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:09,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:41:09,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065183012] [2021-03-10 21:41:09,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:41:09,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:09,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:41:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:41:09,480 INFO L87 Difference]: Start difference. First operand 3890 states and 11578 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:10,914 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 21:41:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:12,242 INFO L93 Difference]: Finished difference Result 4444 states and 12980 transitions. [2021-03-10 21:41:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:41:12,244 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:12,249 INFO L225 Difference]: With dead ends: 4444 [2021-03-10 21:41:12,250 INFO L226 Difference]: Without dead ends: 4429 [2021-03-10 21:41:12,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 2490.0ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:41:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-03-10 21:41:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3895. [2021-03-10 21:41:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 2.978428351309707) internal successors, (11598), 3894 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 11598 transitions. [2021-03-10 21:41:12,297 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 11598 transitions. Word has length 22 [2021-03-10 21:41:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:12,297 INFO L480 AbstractCegarLoop]: Abstraction has 3895 states and 11598 transitions. [2021-03-10 21:41:12,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 11598 transitions. [2021-03-10 21:41:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:12,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:12,300 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:12,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75284,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:12,501 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1444269329, now seen corresponding path program 477 times [2021-03-10 21:41:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:12,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17158608] [2021-03-10 21:41:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:12,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17158608] [2021-03-10 21:41:12,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207102341] [2021-03-10 21:41:12,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:12,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:41:12,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:12,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:12,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:13,711 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:13,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:13,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:15,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:15,849 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:15,850 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:15,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:17,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:17,429 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:17,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:17,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:41:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:17,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:17,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:41:17,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989404586] [2021-03-10 21:41:17,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:41:17,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:17,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:41:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:41:17,511 INFO L87 Difference]: Start difference. First operand 3895 states and 11598 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:20,083 INFO L93 Difference]: Finished difference Result 4314 states and 12654 transitions. [2021-03-10 21:41:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:41:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:20,089 INFO L225 Difference]: With dead ends: 4314 [2021-03-10 21:41:20,089 INFO L226 Difference]: Without dead ends: 4304 [2021-03-10 21:41:20,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2541.1ms TimeCoverageRelationStatistics Valid=399, Invalid=2907, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:41:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-03-10 21:41:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 3895. [2021-03-10 21:41:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 2.978428351309707) internal successors, (11598), 3894 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 11598 transitions. [2021-03-10 21:41:20,136 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 11598 transitions. Word has length 22 [2021-03-10 21:41:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:20,136 INFO L480 AbstractCegarLoop]: Abstraction has 3895 states and 11598 transitions. [2021-03-10 21:41:20,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 11598 transitions. [2021-03-10 21:41:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:20,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:20,139 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:20,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75800 [2021-03-10 21:41:20,340 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash -68267093, now seen corresponding path program 478 times [2021-03-10 21:41:20,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:20,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570056479] [2021-03-10 21:41:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:20,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570056479] [2021-03-10 21:41:20,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179985496] [2021-03-10 21:41:20,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:20,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:41:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:20,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:20,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:21,433 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:21,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:21,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:22,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:22,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:22,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:41:22,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:41:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:22,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:22,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:41:22,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190985742] [2021-03-10 21:41:22,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:41:22,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:41:22,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:41:22,064 INFO L87 Difference]: Start difference. First operand 3895 states and 11598 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:23,141 INFO L93 Difference]: Finished difference Result 3971 states and 11733 transitions. [2021-03-10 21:41:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:41:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:23,146 INFO L225 Difference]: With dead ends: 3971 [2021-03-10 21:41:23,147 INFO L226 Difference]: Without dead ends: 3943 [2021-03-10 21:41:23,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 990.2ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:41:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-03-10 21:41:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3895. [2021-03-10 21:41:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 2.9758602978941964) internal successors, (11588), 3894 states have internal predecessors, (11588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 11588 transitions. [2021-03-10 21:41:23,184 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 11588 transitions. Word has length 22 [2021-03-10 21:41:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:23,184 INFO L480 AbstractCegarLoop]: Abstraction has 3895 states and 11588 transitions. [2021-03-10 21:41:23,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 11588 transitions. [2021-03-10 21:41:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:23,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:23,187 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:23,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76650,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:23,388 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1363801801, now seen corresponding path program 479 times [2021-03-10 21:41:23,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:23,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113926285] [2021-03-10 21:41:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:41:23,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113926285] [2021-03-10 21:41:23,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744732553] [2021-03-10 21:41:23,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:23,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:41:23,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:23,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:24,494 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:24,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:24,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:25,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:25,789 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:25,790 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:25,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:30,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:30,519 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:30,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:30,521 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:41:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:30,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:30,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:41:30,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830872418] [2021-03-10 21:41:30,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:41:30,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:41:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:41:30,575 INFO L87 Difference]: Start difference. First operand 3895 states and 11588 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:34,383 INFO L93 Difference]: Finished difference Result 5005 states and 14576 transitions. [2021-03-10 21:41:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:41:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:34,392 INFO L225 Difference]: With dead ends: 5005 [2021-03-10 21:41:34,392 INFO L226 Difference]: Without dead ends: 4985 [2021-03-10 21:41:34,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 3120.8ms TimeCoverageRelationStatistics Valid=623, Invalid=4489, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:41:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4985 states. [2021-03-10 21:41:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4985 to 4083. [2021-03-10 21:41:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4082 states have (on average 2.976972072513474) internal successors, (12152), 4082 states have internal predecessors, (12152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 12152 transitions. [2021-03-10 21:41:34,443 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 12152 transitions. Word has length 22 [2021-03-10 21:41:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:34,443 INFO L480 AbstractCegarLoop]: Abstraction has 4083 states and 12152 transitions. [2021-03-10 21:41:34,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 12152 transitions. [2021-03-10 21:41:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:34,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:34,447 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:34,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76817 [2021-03-10 21:41:34,647 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:34,647 INFO L82 PathProgramCache]: Analyzing trace with hash 518830349, now seen corresponding path program 480 times [2021-03-10 21:41:34,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:34,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75162118] [2021-03-10 21:41:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:34,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75162118] [2021-03-10 21:41:34,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159899037] [2021-03-10 21:41:34,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:34,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:41:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:34,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:35,826 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:35,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:35,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:37,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:38,298 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:38,299 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:39,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:39,521 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:39,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:39,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:41:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:39,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:39,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:41:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797269111] [2021-03-10 21:41:39,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:41:39,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:41:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:41:39,586 INFO L87 Difference]: Start difference. First operand 4083 states and 12152 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:41,006 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 21:41:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:42,403 INFO L93 Difference]: Finished difference Result 5156 states and 15134 transitions. [2021-03-10 21:41:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:41:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:42,410 INFO L225 Difference]: With dead ends: 5156 [2021-03-10 21:41:42,410 INFO L226 Difference]: Without dead ends: 5141 [2021-03-10 21:41:42,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2761.8ms TimeCoverageRelationStatistics Valid=496, Invalid=3536, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 21:41:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2021-03-10 21:41:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 4045. [2021-03-10 21:41:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4045 states, 4044 states have (on average 2.9772502472799207) internal successors, (12040), 4044 states have internal predecessors, (12040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4045 states to 4045 states and 12040 transitions. [2021-03-10 21:41:42,454 INFO L78 Accepts]: Start accepts. Automaton has 4045 states and 12040 transitions. Word has length 22 [2021-03-10 21:41:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:42,454 INFO L480 AbstractCegarLoop]: Abstraction has 4045 states and 12040 transitions. [2021-03-10 21:41:42,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4045 states and 12040 transitions. [2021-03-10 21:41:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:42,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:42,457 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:42,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77845,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:42,658 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash 94519113, now seen corresponding path program 481 times [2021-03-10 21:41:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:42,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528832505] [2021-03-10 21:41:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528832505] [2021-03-10 21:41:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637901991] [2021-03-10 21:41:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:42,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:43,768 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:43,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:45,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:45,815 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:45,816 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:47,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:47,260 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:47,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:47,262 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:41:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:47,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:47,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:41:47,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117328101] [2021-03-10 21:41:47,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:41:47,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:41:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:41:47,352 INFO L87 Difference]: Start difference. First operand 4045 states and 12040 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:48,901 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 21:41:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:50,028 INFO L93 Difference]: Finished difference Result 4502 states and 13222 transitions. [2021-03-10 21:41:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:41:50,029 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:50,034 INFO L225 Difference]: With dead ends: 4502 [2021-03-10 21:41:50,034 INFO L226 Difference]: Without dead ends: 4492 [2021-03-10 21:41:50,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 2447.8ms TimeCoverageRelationStatistics Valid=411, Invalid=2895, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:41:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4492 states. [2021-03-10 21:41:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4492 to 4046. [2021-03-10 21:41:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 4045 states have (on average 2.97725587144623) internal successors, (12043), 4045 states have internal predecessors, (12043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 12043 transitions. [2021-03-10 21:41:50,075 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 12043 transitions. Word has length 22 [2021-03-10 21:41:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:50,075 INFO L480 AbstractCegarLoop]: Abstraction has 4046 states and 12043 transitions. [2021-03-10 21:41:50,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 12043 transitions. [2021-03-10 21:41:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:50,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:50,078 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:50,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78615 [2021-03-10 21:41:50,279 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:50,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1981471505, now seen corresponding path program 482 times [2021-03-10 21:41:50,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:50,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241414197] [2021-03-10 21:41:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:50,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241414197] [2021-03-10 21:41:50,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637030594] [2021-03-10 21:41:50,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:50,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:41:50,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:50,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:51,613 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:51,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:51,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:52,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:52,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:52,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:41:52,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:41:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:52,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:52,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:41:52,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813848582] [2021-03-10 21:41:52,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:41:52,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:41:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:41:52,811 INFO L87 Difference]: Start difference. First operand 4046 states and 12043 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:54,015 INFO L93 Difference]: Finished difference Result 4100 states and 12140 transitions. [2021-03-10 21:41:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:41:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:41:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:54,022 INFO L225 Difference]: With dead ends: 4100 [2021-03-10 21:41:54,022 INFO L226 Difference]: Without dead ends: 4082 [2021-03-10 21:41:54,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1088.8ms TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:41:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-03-10 21:41:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4046. [2021-03-10 21:41:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 4045 states have (on average 2.976761433868974) internal successors, (12041), 4045 states have internal predecessors, (12041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 12041 transitions. [2021-03-10 21:41:54,065 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 12041 transitions. Word has length 22 [2021-03-10 21:41:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:54,065 INFO L480 AbstractCegarLoop]: Abstraction has 4046 states and 12041 transitions. [2021-03-10 21:41:54,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 12041 transitions. [2021-03-10 21:41:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:54,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:54,069 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:54,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79434,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:54,269 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:54,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1391083439, now seen corresponding path program 483 times [2021-03-10 21:41:54,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:54,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583564908] [2021-03-10 21:41:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:54,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583564908] [2021-03-10 21:41:54,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190355857] [2021-03-10 21:41:54,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:54,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:41:54,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:54,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:54,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:55,334 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:55,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:55,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:56,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:57,144 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:57,144 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:57,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:57,929 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:57,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:57,930 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:41:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:57,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:57,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:41:57,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307404428] [2021-03-10 21:41:57,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:41:57,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:57,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:41:57,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:41:57,992 INFO L87 Difference]: Start difference. First operand 4046 states and 12041 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:59,165 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 21:42:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:00,974 INFO L93 Difference]: Finished difference Result 4722 states and 13875 transitions. [2021-03-10 21:42:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:42:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:00,982 INFO L225 Difference]: With dead ends: 4722 [2021-03-10 21:42:00,982 INFO L226 Difference]: Without dead ends: 4712 [2021-03-10 21:42:00,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2818.9ms TimeCoverageRelationStatistics Valid=483, Invalid=3177, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 21:42:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4712 states. [2021-03-10 21:42:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4712 to 4117. [2021-03-10 21:42:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4117 states, 4116 states have (on average 2.977405247813411) internal successors, (12255), 4116 states have internal predecessors, (12255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4117 states to 4117 states and 12255 transitions. [2021-03-10 21:42:01,029 INFO L78 Accepts]: Start accepts. Automaton has 4117 states and 12255 transitions. Word has length 22 [2021-03-10 21:42:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:01,029 INFO L480 AbstractCegarLoop]: Abstraction has 4117 states and 12255 transitions. [2021-03-10 21:42:01,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4117 states and 12255 transitions. [2021-03-10 21:42:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:01,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:01,032 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:01,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79764 [2021-03-10 21:42:01,233 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1559042859, now seen corresponding path program 484 times [2021-03-10 21:42:01,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:01,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204363413] [2021-03-10 21:42:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:01,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204363413] [2021-03-10 21:42:01,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342255036] [2021-03-10 21:42:01,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:01,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:42:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:01,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:02,226 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:02,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:02,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:02,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:02,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:02,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:42:02,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:42:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:02,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:02,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:42:02,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499856256] [2021-03-10 21:42:02,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:42:02,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:02,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:42:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:42:02,769 INFO L87 Difference]: Start difference. First operand 4117 states and 12255 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:04,538 INFO L93 Difference]: Finished difference Result 4579 states and 13614 transitions. [2021-03-10 21:42:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:42:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:04,545 INFO L225 Difference]: With dead ends: 4579 [2021-03-10 21:42:04,545 INFO L226 Difference]: Without dead ends: 4565 [2021-03-10 21:42:04,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 785.6ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:42:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2021-03-10 21:42:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 4534. [2021-03-10 21:42:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 4533 states have (on average 2.985219501433929) internal successors, (13532), 4533 states have internal predecessors, (13532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 13532 transitions. [2021-03-10 21:42:04,593 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 13532 transitions. Word has length 22 [2021-03-10 21:42:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:04,593 INFO L480 AbstractCegarLoop]: Abstraction has 4534 states and 13532 transitions. [2021-03-10 21:42:04,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 13532 transitions. [2021-03-10 21:42:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:04,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:04,597 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:04,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80357 [2021-03-10 21:42:04,797 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1877049907, now seen corresponding path program 485 times [2021-03-10 21:42:04,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:04,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853770698] [2021-03-10 21:42:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:05,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853770698] [2021-03-10 21:42:05,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673044903] [2021-03-10 21:42:05,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:05,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:42:05,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:05,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:06,102 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:06,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:06,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:07,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:07,831 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:07,832 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:07,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:08,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:08,494 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:08,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:08,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:42:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:08,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:08,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:42:08,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260681180] [2021-03-10 21:42:08,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:42:08,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:42:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:42:08,549 INFO L87 Difference]: Start difference. First operand 4534 states and 13532 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:12,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:12,688 INFO L93 Difference]: Finished difference Result 4846 states and 14335 transitions. [2021-03-10 21:42:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:42:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:12,696 INFO L225 Difference]: With dead ends: 4846 [2021-03-10 21:42:12,696 INFO L226 Difference]: Without dead ends: 4836 [2021-03-10 21:42:12,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 2242.8ms TimeCoverageRelationStatistics Valid=427, Invalid=4265, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:42:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-03-10 21:42:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4540. [2021-03-10 21:42:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 2.986560916501432) internal successors, (13556), 4539 states have internal predecessors, (13556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 13556 transitions. [2021-03-10 21:42:12,750 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 13556 transitions. Word has length 22 [2021-03-10 21:42:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:12,750 INFO L480 AbstractCegarLoop]: Abstraction has 4540 states and 13556 transitions. [2021-03-10 21:42:12,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 13556 transitions. [2021-03-10 21:42:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:12,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:12,754 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:12,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80538 [2021-03-10 21:42:12,955 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:12,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:12,955 INFO L82 PathProgramCache]: Analyzing trace with hash -166436599, now seen corresponding path program 486 times [2021-03-10 21:42:12,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:12,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419935358] [2021-03-10 21:42:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:13,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419935358] [2021-03-10 21:42:13,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923031759] [2021-03-10 21:42:13,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:13,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:42:13,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:13,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:13,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:14,056 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:14,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:14,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:14,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:15,255 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:15,256 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:17,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:17,108 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:17,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:17,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:42:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:17,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:17,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:42:17,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931533027] [2021-03-10 21:42:17,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:42:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:42:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:42:17,180 INFO L87 Difference]: Start difference. First operand 4540 states and 13556 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:21,325 INFO L93 Difference]: Finished difference Result 5026 states and 14856 transitions. [2021-03-10 21:42:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:42:21,326 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:21,333 INFO L225 Difference]: With dead ends: 5026 [2021-03-10 21:42:21,333 INFO L226 Difference]: Without dead ends: 5016 [2021-03-10 21:42:21,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 2065.9ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:42:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2021-03-10 21:42:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 4608. [2021-03-10 21:42:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 2.990232255263729) internal successors, (13776), 4607 states have internal predecessors, (13776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 13776 transitions. [2021-03-10 21:42:21,410 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 13776 transitions. Word has length 22 [2021-03-10 21:42:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:21,410 INFO L480 AbstractCegarLoop]: Abstraction has 4608 states and 13776 transitions. [2021-03-10 21:42:21,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 13776 transitions. [2021-03-10 21:42:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:21,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:21,414 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:21,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81043,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:21,615 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1322968397, now seen corresponding path program 487 times [2021-03-10 21:42:21,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:21,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544625124] [2021-03-10 21:42:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:42:21,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544625124] [2021-03-10 21:42:21,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222356725] [2021-03-10 21:42:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:21,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:22,972 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:22,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:22,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:23,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:24,322 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:24,323 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:24,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:25,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:25,149 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:25,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:25,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:42:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:25,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:25,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:42:25,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036598905] [2021-03-10 21:42:25,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:42:25,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:25,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:42:25,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:42:25,244 INFO L87 Difference]: Start difference. First operand 4608 states and 13776 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:28,277 INFO L93 Difference]: Finished difference Result 5308 states and 15683 transitions. [2021-03-10 21:42:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:42:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:28,285 INFO L225 Difference]: With dead ends: 5308 [2021-03-10 21:42:28,285 INFO L226 Difference]: Without dead ends: 5293 [2021-03-10 21:42:28,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2240.4ms TimeCoverageRelationStatistics Valid=366, Invalid=3416, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:42:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-03-10 21:42:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 4853. [2021-03-10 21:42:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4853 states, 4852 states have (on average 2.9917559769167354) internal successors, (14516), 4852 states have internal predecessors, (14516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 14516 transitions. [2021-03-10 21:42:28,341 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 14516 transitions. Word has length 22 [2021-03-10 21:42:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:28,341 INFO L480 AbstractCegarLoop]: Abstraction has 4853 states and 14516 transitions. [2021-03-10 21:42:28,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 14516 transitions. [2021-03-10 21:42:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:28,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:28,346 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:28,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81725,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:28,547 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:28,547 INFO L82 PathProgramCache]: Analyzing trace with hash 249883017, now seen corresponding path program 488 times [2021-03-10 21:42:28,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:28,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013517519] [2021-03-10 21:42:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013517519] [2021-03-10 21:42:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867229639] [2021-03-10 21:42:28,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:28,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:42:28,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:28,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:29,825 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:29,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:29,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:30,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:31,094 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:31,095 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:32,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:32,312 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:32,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:32,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:42:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:32,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:32,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:42:32,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256386416] [2021-03-10 21:42:32,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:42:32,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:42:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:42:32,372 INFO L87 Difference]: Start difference. First operand 4853 states and 14516 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:37,151 INFO L93 Difference]: Finished difference Result 5559 states and 16284 transitions. [2021-03-10 21:42:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:42:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:37,160 INFO L225 Difference]: With dead ends: 5559 [2021-03-10 21:42:37,160 INFO L226 Difference]: Without dead ends: 5534 [2021-03-10 21:42:37,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3407.0ms TimeCoverageRelationStatistics Valid=560, Invalid=4990, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 21:42:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2021-03-10 21:42:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 4872. [2021-03-10 21:42:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4871 states have (on average 2.992404023814412) internal successors, (14576), 4871 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 14576 transitions. [2021-03-10 21:42:37,221 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 14576 transitions. Word has length 22 [2021-03-10 21:42:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:37,221 INFO L480 AbstractCegarLoop]: Abstraction has 4872 states and 14576 transitions. [2021-03-10 21:42:37,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 14576 transitions. [2021-03-10 21:42:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:37,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:37,226 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:37,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82138,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:37,426 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:37,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:37,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1343974605, now seen corresponding path program 489 times [2021-03-10 21:42:37,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:37,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721174819] [2021-03-10 21:42:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:42:37,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721174819] [2021-03-10 21:42:37,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986413908] [2021-03-10 21:42:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:37,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:42:37,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:37,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:37,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:38,624 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:38,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:38,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:40,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:41,032 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:41,033 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:41,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:41,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:42,034 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:42,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:42,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:42:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:42,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:42,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:42:42,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34170143] [2021-03-10 21:42:42,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:42:42,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:42,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:42:42,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:42:42,109 INFO L87 Difference]: Start difference. First operand 4872 states and 14576 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:45,778 INFO L93 Difference]: Finished difference Result 5609 states and 16530 transitions. [2021-03-10 21:42:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:42:45,780 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:45,786 INFO L225 Difference]: With dead ends: 5609 [2021-03-10 21:42:45,786 INFO L226 Difference]: Without dead ends: 5594 [2021-03-10 21:42:45,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2918.2ms TimeCoverageRelationStatistics Valid=540, Invalid=3882, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 21:42:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2021-03-10 21:42:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 5008. [2021-03-10 21:42:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 5007 states have (on average 2.9920111843419215) internal successors, (14981), 5007 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 14981 transitions. [2021-03-10 21:42:45,842 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 14981 transitions. Word has length 22 [2021-03-10 21:42:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:45,842 INFO L480 AbstractCegarLoop]: Abstraction has 5008 states and 14981 transitions. [2021-03-10 21:42:45,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 14981 transitions. [2021-03-10 21:42:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:45,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:45,846 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:46,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82604 [2021-03-10 21:42:46,047 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:46,047 INFO L82 PathProgramCache]: Analyzing trace with hash 901075465, now seen corresponding path program 490 times [2021-03-10 21:42:46,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:46,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698284026] [2021-03-10 21:42:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:46,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698284026] [2021-03-10 21:42:46,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350897421] [2021-03-10 21:42:46,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:46,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:42:46,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:46,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:47,164 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:47,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:47,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:47,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:48,112 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:48,113 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:48,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:51,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:51,751 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:51,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:51,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:42:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:51,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:51,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:42:51,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178855594] [2021-03-10 21:42:51,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:42:51,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:42:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:42:51,842 INFO L87 Difference]: Start difference. First operand 5008 states and 14981 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:56,542 INFO L93 Difference]: Finished difference Result 5877 states and 17231 transitions. [2021-03-10 21:42:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:42:56,544 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:42:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:56,551 INFO L225 Difference]: With dead ends: 5877 [2021-03-10 21:42:56,551 INFO L226 Difference]: Without dead ends: 5852 [2021-03-10 21:42:56,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 3541.7ms TimeCoverageRelationStatistics Valid=682, Invalid=4574, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:42:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-03-10 21:42:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 5011. [2021-03-10 21:42:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5011 states, 5010 states have (on average 2.9914171656686626) internal successors, (14987), 5010 states have internal predecessors, (14987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5011 states to 5011 states and 14987 transitions. [2021-03-10 21:42:56,628 INFO L78 Accepts]: Start accepts. Automaton has 5011 states and 14987 transitions. Word has length 22 [2021-03-10 21:42:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:56,628 INFO L480 AbstractCegarLoop]: Abstraction has 5011 states and 14987 transitions. [2021-03-10 21:42:56,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5011 states and 14987 transitions. [2021-03-10 21:42:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:56,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:56,632 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:56,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83300 [2021-03-10 21:42:56,832 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash 56104013, now seen corresponding path program 491 times [2021-03-10 21:42:56,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:56,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364917382] [2021-03-10 21:42:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:42:57,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364917382] [2021-03-10 21:42:57,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839841220] [2021-03-10 21:42:57,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:57,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:42:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:57,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:57,986 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:57,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:58,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:59,187 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:59,188 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:59,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:43:00,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:00,292 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:43:00,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:00,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:43:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:00,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:00,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:43:00,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240552818] [2021-03-10 21:43:00,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:43:00,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:00,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:43:00,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:43:00,351 INFO L87 Difference]: Start difference. First operand 5011 states and 14987 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:03,913 INFO L93 Difference]: Finished difference Result 5392 states and 15924 transitions. [2021-03-10 21:43:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:43:03,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:43:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:03,921 INFO L225 Difference]: With dead ends: 5392 [2021-03-10 21:43:03,921 INFO L226 Difference]: Without dead ends: 5377 [2021-03-10 21:43:03,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 3035.4ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:43:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2021-03-10 21:43:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 5021. [2021-03-10 21:43:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5021 states, 5020 states have (on average 2.990836653386454) internal successors, (15014), 5020 states have internal predecessors, (15014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 15014 transitions. [2021-03-10 21:43:03,975 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 15014 transitions. Word has length 22 [2021-03-10 21:43:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:03,975 INFO L480 AbstractCegarLoop]: Abstraction has 5021 states and 15014 transitions. [2021-03-10 21:43:03,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 15014 transitions. [2021-03-10 21:43:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:43:03,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:03,980 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:04,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84248,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:04,180 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -368207223, now seen corresponding path program 492 times [2021-03-10 21:43:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:04,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166184553] [2021-03-10 21:43:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:04,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166184553] [2021-03-10 21:43:04,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665320215] [2021-03-10 21:43:04,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:04,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:43:04,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:04,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:43:04,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:05,349 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:43:05,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:05,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:43:06,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:07,171 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:43:07,171 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:43:07,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:43:07,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:08,009 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:43:08,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:08,011 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-03-10 21:43:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:08,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:08,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:43:08,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568000529] [2021-03-10 21:43:08,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:43:08,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:08,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:43:08,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:43:08,084 INFO L87 Difference]: Start difference. First operand 5021 states and 15014 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:09,609 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 Received shutdown request... [2021-03-10 21:43:11,127 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-03-10 21:43:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:43:11,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84699 [2021-03-10 21:43:11,339 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:43:11,342 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:43:11,342 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:43:11 BasicIcfg [2021-03-10 21:43:11,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:43:11,343 INFO L168 Benchmark]: Toolchain (without parser) took 884512.08 ms. Allocated memory was 255.9 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 236.3 MB in the beginning and 687.6 MB in the end (delta: -451.4 MB). Peak memory consumption was 951.3 MB. Max. memory is 16.0 GB. [2021-03-10 21:43:11,343 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:43:11,343 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.79 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:43:11,343 INFO L168 Benchmark]: Boogie Preprocessor took 12.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 973.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:43:11,343 INFO L168 Benchmark]: RCFGBuilder took 296.93 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 235.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-10 21:43:11,344 INFO L168 Benchmark]: TraceAbstraction took 884179.48 ms. Allocated memory was 255.9 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 234.6 MB in the beginning and 687.6 MB in the end (delta: -453.0 MB). Peak memory consumption was 948.2 MB. Max. memory is 16.0 GB. [2021-03-10 21:43:11,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.79 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 973.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 296.93 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 235.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 884179.48 ms. Allocated memory was 255.9 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 234.6 MB in the beginning and 687.6 MB in the end (delta: -453.0 MB). Peak memory consumption was 948.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 57). Cancelled while BasicCegarLoop was constructing difference of abstraction (5021states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 9ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 884097.6ms, OverallIterations: 500, TraceHistogramMax: 8, EmptinessCheckTime: 680.3ms, AutomataDifference: 289629.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10999 SDtfs, 25663 SDslu, 102505 SDs, 0 SdLazy, 235306 SolverSat, 20107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86139.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20342 GetRequests, 6577 SyntacticMatches, 122 SemanticMatches, 13642 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120969 ImplicationChecksByTransitivity, 240806.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5602occurred in iteration=314, InterpolantAutomatonStates: 11392, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9375.6ms AutomataMinimizationTime, 499 MinimizatonAttempts, 115833 StatesRemovedByMinimization, 497 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1265.3ms SsaConstructionTime, 4303.5ms SatisfiabilityAnalysisTime, 472544.4ms InterpolantComputationTime, 19069 NumberOfCodeBlocks, 19069 NumberOfCodeBlocksAsserted, 1981 NumberOfCheckSat, 18073 ConstructedInterpolants, 0 QuantifiedInterpolants, 187043 SizeOfPredicates, 808 NumberOfNonLiveVariables, 38141 ConjunctsInSsa, 13603 ConjunctsInUnsatCore, 996 InterpolantComputations, 4 PerfectInterpolantSequences, 4657/29926 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown