/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-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:28:51,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:28:51,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:28:51,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:28:51,451 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 21:28:51,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:28:51,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:28:51,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:28:51,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:28:51,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:28:51,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:28:51,490 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:28:51,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:28:51,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:28:51,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:28:51,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:28:51,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:28:51,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:28:51,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:28:51,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:28:51,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:28:51,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:28:51,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:28:51,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:28:51,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:28:51,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:28:51,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:28:51,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:28:51,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:28:51,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:28:51,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:28:51,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:28:51,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:28:51,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:28:51,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:28:51,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:28:51,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:28:51,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:28:51,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:28:51,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:28:51,828 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:28:51,830 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:28:51,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-03-10 21:28:51,831 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-03-10 21:28:51,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:28:51,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:28:51,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:28:51,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:28:51,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:28:51,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:28:51,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:28:51,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:28:51,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:28:51,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/1) ... [2021-03-10 21:28:51,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:28:51,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:28:51,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:28:51,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:28:51,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (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 21:28:51,997 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:28:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:28:51,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:28:51,997 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:28:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:28:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:28:51,998 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:28:51,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:28:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:28:51,999 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 21:28:52,348 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:28:52,348 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:28:52,349 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:28:52,350 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:28:52 BoogieIcfgContainer [2021-03-10 21:28:52,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:28:52,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:28:52,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:28:52,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:28:52,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:28:51" (1/2) ... [2021-03-10 21:28:52,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec2829d and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:28:52, skipping insertion in model container [2021-03-10 21:28:52,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:28:52" (2/2) ... [2021-03-10 21:28:52,361 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-03-10 21:28:52,366 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:28:52,366 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:28:52,369 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:28:52,370 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:28:52,419 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:28:52,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:28:52,465 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:28:52,465 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:28:52,466 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:28:52,466 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:28:52,466 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:28:52,466 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:28:52,466 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:28:52,466 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:28:52,475 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-03-10 21:28:52,484 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 21:28:52,486 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 21:28:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:28:52,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:52,492 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:52,492 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash -163389209, now seen corresponding path program 1 times [2021-03-10 21:28:52,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:52,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18874105] [2021-03-10 21:28:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:52,675 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 21:28:52,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18874105] [2021-03-10 21:28:52,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:52,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:28:52,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411148111] [2021-03-10 21:28:52,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:28:52,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:52,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:28:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:52,691 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 21:28:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:52,727 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-03-10 21:28:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:28:52,728 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 21:28:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:52,735 INFO L225 Difference]: With dead ends: 26 [2021-03-10 21:28:52,735 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 21:28:52,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 21:28:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 21:28:52,758 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 21:28:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-03-10 21:28:52,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-03-10 21:28:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:52,760 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-03-10 21:28:52,760 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 21:28:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-03-10 21:28:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:28:52,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:52,761 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:52,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:28:52,762 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:52,762 INFO L82 PathProgramCache]: Analyzing trace with hash 580194151, now seen corresponding path program 2 times [2021-03-10 21:28:52,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:52,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36032964] [2021-03-10 21:28:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:52,818 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 21:28:52,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36032964] [2021-03-10 21:28:52,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:52,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:28:52,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536918615] [2021-03-10 21:28:52,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:28:52,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:28:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:52,821 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 21:28:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:52,847 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-03-10 21:28:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:28:52,847 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 21:28:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:52,848 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:28:52,848 INFO L226 Difference]: Without dead ends: 23 [2021-03-10 21:28:52,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:28:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-03-10 21:28:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-03-10 21:28:52,852 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 21:28:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-03-10 21:28:52,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-03-10 21:28:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:52,853 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-03-10 21:28:52,853 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 21:28:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-03-10 21:28:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:28:52,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:52,854 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:52,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:28:52,854 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:52,855 INFO L82 PathProgramCache]: Analyzing trace with hash -824603045, now seen corresponding path program 1 times [2021-03-10 21:28:52,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:52,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53573293] [2021-03-10 21:28:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:52,965 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 21:28:52,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53573293] [2021-03-10 21:28:52,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129579948] [2021-03-10 21:28:52,966 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:53,263 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 21:28:53,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:53,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:53,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:53,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 21:28:53,292 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 21:28:53,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:53,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:28:53,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148488437] [2021-03-10 21:28:53,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:53,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:53,294 INFO L87 Difference]: Start difference. First operand 20 states and 35 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 21:28:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:53,367 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-03-10 21:28:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:53,368 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 11 [2021-03-10 21:28:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:53,371 INFO L225 Difference]: With dead ends: 30 [2021-03-10 21:28:53,371 INFO L226 Difference]: Without dead ends: 22 [2021-03-10 21:28:53,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-03-10 21:28:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-03-10 21:28:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-03-10 21:28:53,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-03-10 21:28:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:53,379 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-03-10 21:28:53,379 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 21:28:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-03-10 21:28:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:28:53,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:53,379 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:53,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 21:28:53,591 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash -81019685, now seen corresponding path program 2 times [2021-03-10 21:28:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:53,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437903837] [2021-03-10 21:28:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:53,747 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 21:28:53,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437903837] [2021-03-10 21:28:53,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787739702] [2021-03-10 21:28:53,749 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 21:28:53,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:53,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:53,879 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 21:28:53,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:53,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:53,896 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 13 treesize of output 18 [2021-03-10 21:28:53,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:28:53,942 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-03-10 21:28:53,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:53,943 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-10 21:28:54,004 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 21:28:54,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:54,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:28:54,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245633666] [2021-03-10 21:28:54,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:54,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:54,009 INFO L87 Difference]: Start difference. First operand 22 states and 40 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 21:28:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:54,102 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-03-10 21:28:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:54,103 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 11 [2021-03-10 21:28:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:54,105 INFO L225 Difference]: With dead ends: 35 [2021-03-10 21:28:54,105 INFO L226 Difference]: Without dead ends: 30 [2021-03-10 21:28:54,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-03-10 21:28:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-03-10 21:28:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-03-10 21:28:54,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-03-10 21:28:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:54,117 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-03-10 21:28:54,118 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 21:28:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-03-10 21:28:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:28:54,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:54,118 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:54,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:54,331 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 770124447, now seen corresponding path program 3 times [2021-03-10 21:28:54,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:54,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757843233] [2021-03-10 21:28:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:54,397 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 21:28:54,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757843233] [2021-03-10 21:28:54,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229685063] [2021-03-10 21:28:54,398 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) [2021-03-10 21:28:54,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:28:54,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:54,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:54,568 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 21:28:54,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:54,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:54,578 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 13 treesize of output 18 [2021-03-10 21:28:54,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:28:54,622 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-03-10 21:28:54,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:28:54,624 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-10 21:28:54,673 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 21:28:54,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:54,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:28:54,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263087998] [2021-03-10 21:28:54,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:54,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:54,675 INFO L87 Difference]: Start difference. First operand 22 states and 40 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 21:28:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:54,831 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-03-10 21:28:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:28:54,831 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 11 [2021-03-10 21:28:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:54,832 INFO L225 Difference]: With dead ends: 51 [2021-03-10 21:28:54,832 INFO L226 Difference]: Without dead ends: 41 [2021-03-10 21:28:54,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:28:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-03-10 21:28:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-03-10 21:28:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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 21:28:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-03-10 21:28:54,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-03-10 21:28:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:54,836 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-03-10 21:28:54,836 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 21:28:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-03-10 21:28:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:28:54,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:54,837 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:55,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:55,059 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash 108860664, now seen corresponding path program 1 times [2021-03-10 21:28:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:55,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539195237] [2021-03-10 21:28:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:55,084 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 21:28:55,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539195237] [2021-03-10 21:28:55,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:55,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:28:55,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314844447] [2021-03-10 21:28:55,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:28:55,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:28:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:28:55,086 INFO L87 Difference]: Start difference. First operand 26 states and 46 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 21:28:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:55,101 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-03-10 21:28:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:28:55,101 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 21:28:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:55,102 INFO L225 Difference]: With dead ends: 29 [2021-03-10 21:28:55,102 INFO L226 Difference]: Without dead ends: 29 [2021-03-10 21:28:55,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:28:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-03-10 21:28:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-03-10 21:28:55,105 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 21:28:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-03-10 21:28:55,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-03-10 21:28:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:55,105 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-03-10 21:28:55,105 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 21:28:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-03-10 21:28:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:55,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:55,106 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:55,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:28:55,106 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 152604519, now seen corresponding path program 4 times [2021-03-10 21:28:55,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:55,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235475159] [2021-03-10 21:28:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:55,155 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 21:28:55,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235475159] [2021-03-10 21:28:55,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858062603] [2021-03-10 21:28:55,155 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 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 21:28:55,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:55,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:55,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,304 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 21:28:55,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:55,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:55,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:28:55,315 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 21:28:55,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:55,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:28:55,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477117082] [2021-03-10 21:28:55,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:55,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:55,316 INFO L87 Difference]: Start difference. First operand 27 states and 49 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 21:28:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:55,372 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-03-10 21:28:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:55,373 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 12 [2021-03-10 21:28:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:55,373 INFO L225 Difference]: With dead ends: 39 [2021-03-10 21:28:55,373 INFO L226 Difference]: Without dead ends: 34 [2021-03-10 21:28:55,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-03-10 21:28:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-03-10 21:28:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-03-10 21:28:55,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-03-10 21:28:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:55,378 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-03-10 21:28:55,378 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 21:28:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-03-10 21:28:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:55,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:55,378 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:55,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:55,591 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:55,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1747332011, now seen corresponding path program 5 times [2021-03-10 21:28:55,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:55,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77591091] [2021-03-10 21:28:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:55,649 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 21:28:55,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77591091] [2021-03-10 21:28:55,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811844872] [2021-03-10 21:28:55,650 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 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 21:28:55,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:55,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:55,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:55,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,786 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 21:28:55,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:55,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:55,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:55,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:28:55,797 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 21:28:55,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:55,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:28:55,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740543859] [2021-03-10 21:28:55,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:28:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:28:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:55,799 INFO L87 Difference]: Start difference. First operand 32 states and 60 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 21:28:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:55,863 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-03-10 21:28:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:55,863 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 12 [2021-03-10 21:28:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:55,864 INFO L225 Difference]: With dead ends: 50 [2021-03-10 21:28:55,864 INFO L226 Difference]: Without dead ends: 45 [2021-03-10 21:28:55,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:28:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-10 21:28:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-03-10 21:28:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-03-10 21:28:55,868 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-03-10 21:28:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:55,868 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-03-10 21:28:55,868 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 21:28:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-03-10 21:28:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:55,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:55,869 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:56,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:28:56,092 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:56,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1086068228, now seen corresponding path program 1 times [2021-03-10 21:28:56,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:56,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898313072] [2021-03-10 21:28:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:56,120 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 21:28:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898313072] [2021-03-10 21:28:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035202931] [2021-03-10 21:28:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:28:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:56,178 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 21:28:56,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:56,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:28:56,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224734222] [2021-03-10 21:28:56,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:56,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:56,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:56,181 INFO L87 Difference]: Start difference. First operand 32 states and 60 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 21:28:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:56,221 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-03-10 21:28:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:56,222 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 21:28:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:56,224 INFO L225 Difference]: With dead ends: 58 [2021-03-10 21:28:56,224 INFO L226 Difference]: Without dead ends: 58 [2021-03-10 21:28:56,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-03-10 21:28:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-03-10 21:28:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-03-10 21:28:56,237 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-03-10 21:28:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:56,238 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-03-10 21:28:56,238 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 21:28:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-03-10 21:28:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:28:56,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:56,239 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:56,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:56,455 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:56,456 INFO L82 PathProgramCache]: Analyzing trace with hash -974791574, now seen corresponding path program 2 times [2021-03-10 21:28:56,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:56,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128210073] [2021-03-10 21:28:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:56,479 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 21:28:56,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128210073] [2021-03-10 21:28:56,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186299602] [2021-03-10 21:28:56,480 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 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 21:28:56,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:56,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:28:56,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:56,523 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 21:28:56,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:56,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:28:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606038508] [2021-03-10 21:28:56,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:56,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:56,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:56,524 INFO L87 Difference]: Start difference. First operand 33 states and 64 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 21:28:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:56,562 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-03-10 21:28:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:28:56,564 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 21:28:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:56,564 INFO L225 Difference]: With dead ends: 44 [2021-03-10 21:28:56,564 INFO L226 Difference]: Without dead ends: 44 [2021-03-10 21:28:56,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-03-10 21:28:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-03-10 21:28:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-03-10 21:28:56,568 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-03-10 21:28:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:56,568 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-03-10 21:28:56,568 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 21:28:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-03-10 21:28:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:56,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:56,569 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:56,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:56,779 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:56,780 INFO L82 PathProgramCache]: Analyzing trace with hash 381267931, now seen corresponding path program 6 times [2021-03-10 21:28:56,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:56,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189561439] [2021-03-10 21:28:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:56,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189561439] [2021-03-10 21:28:56,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182904488] [2021-03-10 21:28:56,815 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 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 21:28:56,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:28:56,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:28:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:56,918 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 21:28:56,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:56,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:28:56,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349805301] [2021-03-10 21:28:56,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:56,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:56,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:56,920 INFO L87 Difference]: Start difference. First operand 35 states and 70 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 21:28:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:56,960 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-03-10 21:28:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:28:56,961 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 13 [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: 67 [2021-03-10 21:28:56,962 INFO L226 Difference]: Without dead ends: 67 [2021-03-10 21:28:56,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-03-10 21:28:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-03-10 21:28:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2021-03-10 21:28:56,971 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 13 [2021-03-10 21:28:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:56,971 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2021-03-10 21:28:56,971 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 21:28:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2021-03-10 21:28:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:56,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:56,971 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:57,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:28:57,179 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash 462398216, now seen corresponding path program 3 times [2021-03-10 21:28:57,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:57,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829814232] [2021-03-10 21:28:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:57,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829814232] [2021-03-10 21:28:57,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705279297] [2021-03-10 21:28:57,206 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 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 21:28:57,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:28:57,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:28:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:57,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:57,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:28:57,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752128490] [2021-03-10 21:28:57,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:57,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:57,266 INFO L87 Difference]: Start difference. First operand 35 states and 72 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 21:28:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:57,340 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2021-03-10 21:28:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:28:57,341 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 13 [2021-03-10 21:28:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:57,341 INFO L225 Difference]: With dead ends: 80 [2021-03-10 21:28:57,341 INFO L226 Difference]: Without dead ends: 77 [2021-03-10 21:28:57,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-10 21:28:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2021-03-10 21:28:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-03-10 21:28:57,347 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-03-10 21:28:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:57,347 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-03-10 21:28:57,347 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 21:28:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-03-10 21:28:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:57,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:57,348 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:57,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:57,571 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1975995423, now seen corresponding path program 7 times [2021-03-10 21:28:57,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:57,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447415005] [2021-03-10 21:28:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:57,608 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 21:28:57,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447415005] [2021-03-10 21:28:57,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818398040] [2021-03-10 21:28:57,609 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:28:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:57,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:57,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:28:57,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969854522] [2021-03-10 21:28:57,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:57,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:57,677 INFO L87 Difference]: Start difference. First operand 40 states and 85 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 21:28:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:57,726 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-03-10 21:28:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:57,726 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 13 [2021-03-10 21:28:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:57,727 INFO L225 Difference]: With dead ends: 51 [2021-03-10 21:28:57,727 INFO L226 Difference]: Without dead ends: 49 [2021-03-10 21:28:57,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-03-10 21:28:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-03-10 21:28:57,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-03-10 21:28:57,735 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-03-10 21:28:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:57,735 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-03-10 21:28:57,735 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 21:28:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-03-10 21:28:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:57,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:57,736 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:57,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:57,951 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:57,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1314731640, now seen corresponding path program 4 times [2021-03-10 21:28:57,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:57,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121497183] [2021-03-10 21:28:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:57,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121497183] [2021-03-10 21:28:57,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393792802] [2021-03-10 21:28:57,977 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 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 21:28:57,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:57,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:57,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:28:57,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:58,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:28:58,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679785929] [2021-03-10 21:28:58,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:58,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:58,035 INFO L87 Difference]: Start difference. First operand 40 states and 84 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 21:28:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:58,073 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-03-10 21:28:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:28:58,074 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 13 [2021-03-10 21:28:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:58,074 INFO L225 Difference]: With dead ends: 68 [2021-03-10 21:28:58,074 INFO L226 Difference]: Without dead ends: 68 [2021-03-10 21:28:58,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:28:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-03-10 21:28:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-03-10 21:28:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-03-10 21:28:58,077 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-03-10 21:28:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:58,077 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-03-10 21:28:58,077 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 21:28:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-03-10 21:28:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:58,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:58,078 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:58,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 21:28:58,299 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:58,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:58,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307557, now seen corresponding path program 8 times [2021-03-10 21:28:58,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:58,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915825535] [2021-03-10 21:28:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915825535] [2021-03-10 21:28:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827307316] [2021-03-10 21:28:58,335 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) [2021-03-10 21:28:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:58,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:28:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:58,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:28:58,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190441031] [2021-03-10 21:28:58,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:58,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:58,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:58,391 INFO L87 Difference]: Start difference. First operand 38 states and 76 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 21:28:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:58,440 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-03-10 21:28:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:58,440 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 13 [2021-03-10 21:28:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:58,441 INFO L225 Difference]: With dead ends: 51 [2021-03-10 21:28:58,441 INFO L226 Difference]: Without dead ends: 47 [2021-03-10 21:28:58,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:28:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-03-10 21:28:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-03-10 21:28:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-03-10 21:28:58,443 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-03-10 21:28:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:58,443 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-03-10 21:28:58,443 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 21:28:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-03-10 21:28:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:58,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:58,444 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:58,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:28:58,665 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash -746128162, now seen corresponding path program 5 times [2021-03-10 21:28:58,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:58,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813942239] [2021-03-10 21:28:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813942239] [2021-03-10 21:28:58,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550276712] [2021-03-10 21:28:58,696 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:58,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:58,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:28:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:58,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:28:58,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369839965] [2021-03-10 21:28:58,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:58,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:58,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:58,755 INFO L87 Difference]: Start difference. First operand 38 states and 75 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 21:28:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:58,801 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-03-10 21:28:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:58,801 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 13 [2021-03-10 21:28:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:58,802 INFO L225 Difference]: With dead ends: 61 [2021-03-10 21:28:58,802 INFO L226 Difference]: Without dead ends: 61 [2021-03-10 21:28:58,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-03-10 21:28:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-03-10 21:28:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-03-10 21:28:58,814 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-03-10 21:28:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:58,814 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-03-10 21:28:58,814 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 21:28:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-03-10 21:28:58,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:58,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:58,815 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:59,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:28:59,019 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:59,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash 202417055, now seen corresponding path program 9 times [2021-03-10 21:28:59,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:59,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788465756] [2021-03-10 21:28:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788465756] [2021-03-10 21:28:59,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:28:59,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:28:59,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754554796] [2021-03-10 21:28:59,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:28:59,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:28:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:59,047 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:59,065 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-03-10 21:28:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:28:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 21:28:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:59,066 INFO L225 Difference]: With dead ends: 42 [2021-03-10 21:28:59,066 INFO L226 Difference]: Without dead ends: 36 [2021-03-10 21:28:59,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:28:59,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-03-10 21:28:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-03-10 21:28:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-03-10 21:28:59,068 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-03-10 21:28:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:59,069 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-03-10 21:28:59,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-03-10 21:28:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:28:59,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:59,069 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:59,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-10 21:28:59,069 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash -208272584, now seen corresponding path program 6 times [2021-03-10 21:28:59,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:59,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593073867] [2021-03-10 21:28:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593073867] [2021-03-10 21:28:59,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229618482] [2021-03-10 21:28:59,096 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 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 21:28:59,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:28:59,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:59,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:28:59,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:59,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:28:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20357852] [2021-03-10 21:28:59,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:28:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:28:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:28:59,161 INFO L87 Difference]: Start difference. First operand 36 states and 71 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 21:28:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:59,211 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-03-10 21:28:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:28:59,212 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 13 [2021-03-10 21:28:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:59,212 INFO L225 Difference]: With dead ends: 61 [2021-03-10 21:28:59,212 INFO L226 Difference]: Without dead ends: 61 [2021-03-10 21:28:59,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:28:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-03-10 21:28:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-03-10 21:28:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-03-10 21:28:59,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-03-10 21:28:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:59,218 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-03-10 21:28:59,218 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 21:28:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-03-10 21:28:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:59,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:59,219 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:59,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:59,440 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1038970604, now seen corresponding path program 7 times [2021-03-10 21:28:59,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:59,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15066973] [2021-03-10 21:28:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:59,503 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 21:28:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15066973] [2021-03-10 21:28:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115003043] [2021-03-10 21:28:59,503 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:28:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:28:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:59,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:59,707 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 21:28:59,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:59,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:59,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:59,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:28:59,732 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 21:28:59,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:59,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:28:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687211762] [2021-03-10 21:28:59,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:59,734 INFO L87 Difference]: Start difference. First operand 41 states and 83 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 21:28:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:59,842 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-03-10 21:28:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:28:59,842 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 14 [2021-03-10 21:28:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:59,842 INFO L225 Difference]: With dead ends: 56 [2021-03-10 21:28:59,843 INFO L226 Difference]: Without dead ends: 46 [2021-03-10 21:28:59,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:28:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-03-10 21:28:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-03-10 21:28:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-03-10 21:28:59,845 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-03-10 21:28:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:59,845 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-03-10 21:28:59,845 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 21:28:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-03-10 21:28:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:28:59,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:59,845 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:00,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:29:00,046 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:00,046 INFO L82 PathProgramCache]: Analyzing trace with hash -186637180, now seen corresponding path program 8 times [2021-03-10 21:29:00,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:00,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603211213] [2021-03-10 21:29:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:00,112 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 21:29:00,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603211213] [2021-03-10 21:29:00,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076695725] [2021-03-10 21:29:00,112 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 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 21:29:00,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:00,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:00,327 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 21:29:00,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:00,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:00,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:00,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:29:00,344 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 21:29:00,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:00,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:00,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403666819] [2021-03-10 21:29:00,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:00,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:00,346 INFO L87 Difference]: Start difference. First operand 43 states and 87 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 21:29:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:00,556 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-03-10 21:29:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:00,557 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 14 [2021-03-10 21:29:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:00,557 INFO L225 Difference]: With dead ends: 70 [2021-03-10 21:29:00,557 INFO L226 Difference]: Without dead ends: 56 [2021-03-10 21:29:00,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-03-10 21:29:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-03-10 21:29:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-03-10 21:29:00,562 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-03-10 21:29:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:00,562 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-03-10 21:29:00,562 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 21:29:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-03-10 21:29:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:00,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:00,567 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:00,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:00,768 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash 556946180, now seen corresponding path program 9 times [2021-03-10 21:29:00,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:00,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253316484] [2021-03-10 21:29:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:00,851 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 21:29:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253316484] [2021-03-10 21:29:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417109441] [2021-03-10 21:29:00,852 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 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 21:29:00,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:01,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:01,036 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 21 treesize of output 64 [2021-03-10 21:29:01,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:01,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:01,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:01,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:01,100 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 21:29:01,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:01,127 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:01,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:01,128 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:01,160 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 21:29:01,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:01,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:01,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535547180] [2021-03-10 21:29:01,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:01,161 INFO L87 Difference]: Start difference. First operand 47 states and 102 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 21:29:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:01,360 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-03-10 21:29:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:01,361 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 14 [2021-03-10 21:29:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:01,361 INFO L225 Difference]: With dead ends: 88 [2021-03-10 21:29:01,361 INFO L226 Difference]: Without dead ends: 78 [2021-03-10 21:29:01,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-03-10 21:29:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-03-10 21:29:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-03-10 21:29:01,364 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-03-10 21:29:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:01,364 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-03-10 21:29:01,364 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 21:29:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-03-10 21:29:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:01,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:01,364 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:01,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:01,579 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2047470314, now seen corresponding path program 10 times [2021-03-10 21:29:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:01,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372042800] [2021-03-10 21:29:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:01,641 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 21:29:01,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372042800] [2021-03-10 21:29:01,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761608607] [2021-03-10 21:29:01,642 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 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 21:29:01,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:01,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:01,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:01,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:01,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:01,797 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 21:29:01,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:01,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:01,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:01,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:29:01,811 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 21:29:01,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:01,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:01,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429677294] [2021-03-10 21:29:01,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:01,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:01,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:01,812 INFO L87 Difference]: Start difference. First operand 47 states and 102 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 21:29:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:01,976 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-03-10 21:29:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:01,976 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 14 [2021-03-10 21:29:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:01,977 INFO L225 Difference]: With dead ends: 76 [2021-03-10 21:29:01,977 INFO L226 Difference]: Without dead ends: 62 [2021-03-10 21:29:01,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-03-10 21:29:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-03-10 21:29:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-03-10 21:29:01,979 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-03-10 21:29:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:01,979 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-03-10 21:29:01,980 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 21:29:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-03-10 21:29:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:01,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:01,980 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:02,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 21:29:02,200 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:02,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:02,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1503913622, now seen corresponding path program 11 times [2021-03-10 21:29:02,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:02,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200954078] [2021-03-10 21:29:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:02,266 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 21:29:02,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200954078] [2021-03-10 21:29:02,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493069394] [2021-03-10 21:29:02,266 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 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 21:29:02,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:02,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:02,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:02,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:02,431 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 21 treesize of output 64 [2021-03-10 21:29:02,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:02,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:02,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:02,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:02,478 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 21:29:02,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:02,502 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:02,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:02,502 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:02,535 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 21:29:02,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:02,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:02,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101582420] [2021-03-10 21:29:02,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:02,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:02,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:02,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:02,536 INFO L87 Difference]: Start difference. First operand 54 states and 127 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 21:29:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:02,736 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-03-10 21:29:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:02,737 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 14 [2021-03-10 21:29:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:02,737 INFO L225 Difference]: With dead ends: 101 [2021-03-10 21:29:02,737 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 21:29:02,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 21:29:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-03-10 21:29:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-03-10 21:29:02,740 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-03-10 21:29:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:02,740 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-03-10 21:29:02,740 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 21:29:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-03-10 21:29:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:02,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:02,741 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:02,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 21:29:02,947 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash -652769490, now seen corresponding path program 12 times [2021-03-10 21:29:02,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:02,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989116022] [2021-03-10 21:29:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:03,015 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 21:29:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989116022] [2021-03-10 21:29:03,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077232405] [2021-03-10 21:29:03,016 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:03,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:03,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:03,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:03,213 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 21 treesize of output 64 [2021-03-10 21:29:03,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:03,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:03,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:03,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:03,263 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 21:29:03,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:03,293 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:03,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:03,294 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:03,321 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 21:29:03,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:03,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:03,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122742393] [2021-03-10 21:29:03,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:03,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:03,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:03,323 INFO L87 Difference]: Start difference. First operand 54 states and 126 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 21:29:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:03,526 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-03-10 21:29:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:03,526 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 14 [2021-03-10 21:29:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:03,527 INFO L225 Difference]: With dead ends: 80 [2021-03-10 21:29:03,527 INFO L226 Difference]: Without dead ends: 75 [2021-03-10 21:29:03,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-03-10 21:29:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-03-10 21:29:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-03-10 21:29:03,529 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-03-10 21:29:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:03,529 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-03-10 21:29:03,530 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 21:29:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-03-10 21:29:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:03,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:03,530 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:03,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-03-10 21:29:03,743 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1709641404, now seen corresponding path program 13 times [2021-03-10 21:29:03,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:03,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764534632] [2021-03-10 21:29:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:03,812 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 21:29:03,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764534632] [2021-03-10 21:29:03,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77482623] [2021-03-10 21:29:03,813 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:03,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:03,972 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 21:29:03,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:03,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:03,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:03,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:29:03,987 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 21:29:03,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:03,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:03,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086182311] [2021-03-10 21:29:03,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:03,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:03,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:03,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:03,988 INFO L87 Difference]: Start difference. First operand 54 states and 126 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 21:29:04,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:04,145 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-03-10 21:29:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:04,145 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 14 [2021-03-10 21:29:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:04,145 INFO L225 Difference]: With dead ends: 81 [2021-03-10 21:29:04,145 INFO L226 Difference]: Without dead ends: 67 [2021-03-10 21:29:04,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-03-10 21:29:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-03-10 21:29:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-03-10 21:29:04,148 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-03-10 21:29:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:04,148 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-03-10 21:29:04,148 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 21:29:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-03-10 21:29:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:04,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:04,149 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:04,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:04,363 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:04,363 INFO L82 PathProgramCache]: Analyzing trace with hash -966058044, now seen corresponding path program 14 times [2021-03-10 21:29:04,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:04,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025089492] [2021-03-10 21:29:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:04,421 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 21:29:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025089492] [2021-03-10 21:29:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177697651] [2021-03-10 21:29:04,421 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 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 21:29:04,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:04,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:04,593 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 21 treesize of output 64 [2021-03-10 21:29:04,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:04,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:04,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:04,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:04,637 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 21:29:04,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:04,658 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:04,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:04,659 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:04,685 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 21:29:04,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:04,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:04,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787686594] [2021-03-10 21:29:04,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:04,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:04,687 INFO L87 Difference]: Start difference. First operand 61 states and 150 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 21:29:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:04,944 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-03-10 21:29:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:04,944 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 14 [2021-03-10 21:29:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:04,944 INFO L225 Difference]: With dead ends: 102 [2021-03-10 21:29:04,944 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:29:04,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:29:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-03-10 21:29:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-03-10 21:29:04,948 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-03-10 21:29:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:04,948 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-03-10 21:29:04,948 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 21:29:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-03-10 21:29:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:04,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:04,948 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:05,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:05,163 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:05,164 INFO L82 PathProgramCache]: Analyzing trace with hash -114913912, now seen corresponding path program 15 times [2021-03-10 21:29:05,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:05,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608531511] [2021-03-10 21:29:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:05,227 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 21:29:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608531511] [2021-03-10 21:29:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751490099] [2021-03-10 21:29:05,228 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:05,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:05,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:05,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:05,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:05,400 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 21 treesize of output 64 [2021-03-10 21:29:05,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:05,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:05,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:05,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:05,447 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 21:29:05,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:05,470 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:05,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:05,471 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:05,497 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 21:29:05,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:05,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:05,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27972804] [2021-03-10 21:29:05,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:05,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:05,498 INFO L87 Difference]: Start difference. First operand 61 states and 150 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 21:29:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:05,783 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-03-10 21:29:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:05,783 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 14 [2021-03-10 21:29:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:05,784 INFO L225 Difference]: With dead ends: 84 [2021-03-10 21:29:05,784 INFO L226 Difference]: Without dead ends: 79 [2021-03-10 21:29:05,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-10 21:29:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-03-10 21:29:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-03-10 21:29:05,788 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-03-10 21:29:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:05,788 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-03-10 21:29:05,788 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 21:29:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-03-10 21:29:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:05,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:05,789 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:06,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 21:29:06,011 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:06,012 INFO L82 PathProgramCache]: Analyzing trace with hash 500750404, now seen corresponding path program 16 times [2021-03-10 21:29:06,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:06,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362343799] [2021-03-10 21:29:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:06,075 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 21:29:06,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362343799] [2021-03-10 21:29:06,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366306595] [2021-03-10 21:29:06,075 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:06,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:06,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:06,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:06,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:06,235 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 21 treesize of output 64 [2021-03-10 21:29:06,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:06,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:06,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:06,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:06,297 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 21:29:06,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:06,316 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:06,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:06,317 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:06,340 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 21:29:06,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:06,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:06,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911953671] [2021-03-10 21:29:06,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:06,342 INFO L87 Difference]: Start difference. First operand 61 states and 150 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 21:29:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:06,572 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-03-10 21:29:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:06,572 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 14 [2021-03-10 21:29:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:06,573 INFO L225 Difference]: With dead ends: 96 [2021-03-10 21:29:06,573 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:29:06,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:29:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-03-10 21:29:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-03-10 21:29:06,575 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-03-10 21:29:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:06,575 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-03-10 21:29:06,576 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 21:29:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-03-10 21:29:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:06,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:06,576 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:06,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:06,783 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2078979626, now seen corresponding path program 17 times [2021-03-10 21:29:06,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:06,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327534126] [2021-03-10 21:29:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:06,853 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 21:29:06,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327534126] [2021-03-10 21:29:06,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131791801] [2021-03-10 21:29:06,853 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:06,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:06,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:06,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:07,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:07,006 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 21:29:07,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:07,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:07,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:07,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:29:07,021 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 21:29:07,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:07,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:07,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864712192] [2021-03-10 21:29:07,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:07,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:07,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:07,023 INFO L87 Difference]: Start difference. First operand 61 states and 150 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 21:29:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:07,168 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-03-10 21:29:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:07,168 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 14 [2021-03-10 21:29:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:07,168 INFO L225 Difference]: With dead ends: 89 [2021-03-10 21:29:07,168 INFO L226 Difference]: Without dead ends: 75 [2021-03-10 21:29:07,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-03-10 21:29:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-03-10 21:29:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-03-10 21:29:07,171 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-03-10 21:29:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:07,172 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-03-10 21:29:07,172 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 21:29:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-03-10 21:29:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:07,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:07,172 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:07,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:07,379 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1472404310, now seen corresponding path program 18 times [2021-03-10 21:29:07,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:07,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708390428] [2021-03-10 21:29:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:07,438 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 21:29:07,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708390428] [2021-03-10 21:29:07,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27087240] [2021-03-10 21:29:07,438 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 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 21:29:07,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:07,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:07,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:07,593 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 21 treesize of output 64 [2021-03-10 21:29:07,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:07,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:07,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:07,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:07,645 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 21:29:07,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:07,668 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-03-10 21:29:07,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:07,669 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:07,696 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 21:29:07,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:07,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:07,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220051809] [2021-03-10 21:29:07,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:07,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:07,698 INFO L87 Difference]: Start difference. First operand 68 states and 174 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 21:29:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:07,919 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-03-10 21:29:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:07,919 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 14 [2021-03-10 21:29:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:07,920 INFO L225 Difference]: With dead ends: 112 [2021-03-10 21:29:07,920 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:29:07,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:29:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-03-10 21:29:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-03-10 21:29:07,923 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-03-10 21:29:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:07,923 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-03-10 21:29:07,923 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 21:29:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-03-10 21:29:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:07,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:07,923 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:08,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 21:29:08,141 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash -621260178, now seen corresponding path program 19 times [2021-03-10 21:29:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:08,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319330048] [2021-03-10 21:29:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:08,207 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 21:29:08,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319330048] [2021-03-10 21:29:08,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206669579] [2021-03-10 21:29:08,207 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 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 21:29:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:08,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:08,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:08,386 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 21 treesize of output 64 [2021-03-10 21:29:08,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:08,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:08,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:08,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:08,414 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 21:29:08,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:08,446 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:08,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:08,447 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:08,473 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 21:29:08,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:08,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:08,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117854350] [2021-03-10 21:29:08,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:08,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:08,474 INFO L87 Difference]: Start difference. First operand 68 states and 174 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 21:29:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:08,649 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-03-10 21:29:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:08,649 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 14 [2021-03-10 21:29:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:08,650 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:29:08,650 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:29:08,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:29:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-03-10 21:29:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-03-10 21:29:08,652 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-03-10 21:29:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:08,652 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-03-10 21:29:08,653 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 21:29:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-03-10 21:29:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:08,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:08,653 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:08,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 21:29:08,863 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:08,863 INFO L82 PathProgramCache]: Analyzing trace with hash -5595862, now seen corresponding path program 20 times [2021-03-10 21:29:08,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:08,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815842159] [2021-03-10 21:29:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:08,930 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 21:29:08,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815842159] [2021-03-10 21:29:08,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826466036] [2021-03-10 21:29:08,930 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 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 21:29:08,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:08,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:08,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:08,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:09,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:09,104 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 21 treesize of output 64 [2021-03-10 21:29:09,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:09,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:09,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:09,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:09,148 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 21:29:09,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:09,172 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:09,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:09,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:09,200 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 21:29:09,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:09,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050265813] [2021-03-10 21:29:09,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:09,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:09,201 INFO L87 Difference]: Start difference. First operand 68 states and 174 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 21:29:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:09,455 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-03-10 21:29:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:09,455 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 14 [2021-03-10 21:29:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:09,456 INFO L225 Difference]: With dead ends: 107 [2021-03-10 21:29:09,456 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:29:09,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:29:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-03-10 21:29:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-03-10 21:29:09,458 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-03-10 21:29:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:09,459 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-03-10 21:29:09,459 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 21:29:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-03-10 21:29:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:29:09,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:09,459 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:09,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 21:29:09,681 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1900128750, now seen corresponding path program 21 times [2021-03-10 21:29:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:09,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626474347] [2021-03-10 21:29:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:09,737 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 21:29:09,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626474347] [2021-03-10 21:29:09,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324090542] [2021-03-10 21:29:09,737 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 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 21:29:09,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:09,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:29:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:09,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:09,909 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 21 treesize of output 64 [2021-03-10 21:29:09,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:09,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:29:09,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:09,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:09,941 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 21:29:09,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:09,963 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:29:09,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:09,963 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-03-10 21:29:09,988 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 21:29:09,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:09,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:29:09,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976252088] [2021-03-10 21:29:09,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:09,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:09,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:09,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:09,989 INFO L87 Difference]: Start difference. First operand 68 states and 174 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 21:29:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:10,345 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-03-10 21:29:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:10,346 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 14 [2021-03-10 21:29:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:10,346 INFO L225 Difference]: With dead ends: 112 [2021-03-10 21:29:10,346 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 21:29:10,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 21:29:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-03-10 21:29:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-03-10 21:29:10,351 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-03-10 21:29:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:10,351 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-03-10 21:29:10,352 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 21:29:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-03-10 21:29:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:10,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:10,352 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:10,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-03-10 21:29:10,574 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:10,575 INFO L82 PathProgramCache]: Analyzing trace with hash -336763768, now seen corresponding path program 22 times [2021-03-10 21:29:10,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:10,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905447743] [2021-03-10 21:29:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905447743] [2021-03-10 21:29:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475178699] [2021-03-10 21:29:10,665 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 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 21:29:10,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:10,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:10,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:10,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:10,855 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 21:29:10,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:10,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:10,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:10,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:10,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:10,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971860179] [2021-03-10 21:29:10,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:10,896 INFO L87 Difference]: Start difference. First operand 70 states and 177 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 21:29:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:11,063 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-03-10 21:29:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:11,063 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 15 [2021-03-10 21:29:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:11,064 INFO L225 Difference]: With dead ends: 95 [2021-03-10 21:29:11,064 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 21:29:11,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 21:29:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-03-10 21:29:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-03-10 21:29:11,066 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-03-10 21:29:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:11,066 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-03-10 21:29:11,066 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 21:29:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-03-10 21:29:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:11,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:11,067 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:11,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:11,275 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:11,275 INFO L82 PathProgramCache]: Analyzing trace with hash 515569656, now seen corresponding path program 23 times [2021-03-10 21:29:11,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:11,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136341420] [2021-03-10 21:29:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136341420] [2021-03-10 21:29:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067602199] [2021-03-10 21:29:11,372 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 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 21:29:11,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:11,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:11,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:11,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:11,557 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 21:29:11,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:11,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:11,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:11,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:11,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:11,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:11,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056910491] [2021-03-10 21:29:11,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:11,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:11,598 INFO L87 Difference]: Start difference. First operand 73 states and 183 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 21:29:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:11,848 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-03-10 21:29:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:11,849 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 15 [2021-03-10 21:29:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:11,849 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:29:11,849 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 21:29:11,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 21:29:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-03-10 21:29:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 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 21:29:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-03-10 21:29:11,851 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-03-10 21:29:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:11,851 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-03-10 21:29:11,851 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 21:29:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-03-10 21:29:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:11,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:11,852 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:12,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:12,052 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1259153016, now seen corresponding path program 24 times [2021-03-10 21:29:12,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:12,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081643715] [2021-03-10 21:29:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:12,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081643715] [2021-03-10 21:29:12,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072781213] [2021-03-10 21:29:12,136 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 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 21:29:12,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:12,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:12,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:12,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:12,299 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 21:29:12,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:12,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:12,352 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 21:29:12,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:12,440 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:12,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:12,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:12,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:12,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206300092] [2021-03-10 21:29:12,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:12,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:12,475 INFO L87 Difference]: Start difference. First operand 74 states and 185 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 21:29:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:12,723 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-03-10 21:29:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:12,723 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 15 [2021-03-10 21:29:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:12,724 INFO L225 Difference]: With dead ends: 112 [2021-03-10 21:29:12,724 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:29:12,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:29:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-03-10 21:29:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 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 21:29:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-03-10 21:29:12,726 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-03-10 21:29:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:12,726 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-03-10 21:29:12,726 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 21:29:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-03-10 21:29:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:12,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:12,727 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:12,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-03-10 21:29:12,927 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash 49437346, now seen corresponding path program 25 times [2021-03-10 21:29:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:12,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179509159] [2021-03-10 21:29:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:13,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179509159] [2021-03-10 21:29:13,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427119009] [2021-03-10 21:29:13,020 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:13,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:13,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:13,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:13,194 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 21:29:13,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:13,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:13,254 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 21:29:13,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:13,321 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:13,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:13,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:13,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:13,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-10 21:29:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532920669] [2021-03-10 21:29:13,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:13,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:13,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:13,351 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:29:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:13,669 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-03-10 21:29:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:13,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 15 [2021-03-10 21:29:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:13,670 INFO L225 Difference]: With dead ends: 128 [2021-03-10 21:29:13,670 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:29:13,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:29:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-03-10 21:29:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-03-10 21:29:13,675 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-03-10 21:29:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:13,675 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-03-10 21:29:13,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:29:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-03-10 21:29:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:13,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:13,676 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:13,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:13,876 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:13,877 INFO L82 PathProgramCache]: Analyzing trace with hash -611826437, now seen corresponding path program 26 times [2021-03-10 21:29:13,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:13,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977280493] [2021-03-10 21:29:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:13,905 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 21:29:13,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977280493] [2021-03-10 21:29:13,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425930319] [2021-03-10 21:29:13,905 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 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 21:29:13,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:13,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:13,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:29:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:13,951 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 21:29:13,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:13,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:29:13,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258167689] [2021-03-10 21:29:13,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:29:13,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:13,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:29:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:29:13,952 INFO L87 Difference]: Start difference. First operand 77 states and 193 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 21:29:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:13,992 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-03-10 21:29:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:29:13,992 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 21:29:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:13,993 INFO L225 Difference]: With dead ends: 163 [2021-03-10 21:29:13,993 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 21:29:13,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 21:29:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-03-10 21:29:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-03-10 21:29:13,996 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-03-10 21:29:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:13,996 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-03-10 21:29:13,996 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 21:29:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-03-10 21:29:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:13,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:13,996 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:14,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:14,218 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1007434568, now seen corresponding path program 27 times [2021-03-10 21:29:14,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:14,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415826081] [2021-03-10 21:29:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415826081] [2021-03-10 21:29:14,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932491021] [2021-03-10 21:29:14,325 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 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 21:29:14,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:14,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:14,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:14,501 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 21:29:14,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:14,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:14,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:14,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:14,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:14,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256446413] [2021-03-10 21:29:14,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:14,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:14,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:14,539 INFO L87 Difference]: Start difference. First operand 82 states and 212 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 21:29:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:14,785 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-03-10 21:29:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:14,786 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 15 [2021-03-10 21:29:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:14,786 INFO L225 Difference]: With dead ends: 95 [2021-03-10 21:29:14,786 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 21:29:14,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 21:29:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-03-10 21:29:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-03-10 21:29:14,789 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-03-10 21:29:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:14,789 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-03-10 21:29:14,789 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 21:29:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-03-10 21:29:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:14,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:14,789 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:15,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:15,006 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:15,006 INFO L82 PathProgramCache]: Analyzing trace with hash -263851208, now seen corresponding path program 28 times [2021-03-10 21:29:15,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:15,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755804067] [2021-03-10 21:29:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:15,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755804067] [2021-03-10 21:29:15,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392406038] [2021-03-10 21:29:15,117 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 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 21:29:15,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:15,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:15,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:15,283 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 21:29:15,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:15,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:15,340 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 21:29:15,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-03-10 21:29:15,434 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-03-10 21:29:15,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:15,435 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:15,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:15,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:15,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026049081] [2021-03-10 21:29:15,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:15,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:15,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:15,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:15,468 INFO L87 Difference]: Start difference. First operand 82 states and 210 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 21:29:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:15,780 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-03-10 21:29:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:15,780 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 15 [2021-03-10 21:29:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:15,781 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:29:15,781 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 21:29:15,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 21:29:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-03-10 21:29:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-03-10 21:29:15,783 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-03-10 21:29:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:15,784 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-03-10 21:29:15,784 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 21:29:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-03-10 21:29:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:15,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:15,784 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:16,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:16,007 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:16,008 INFO L82 PathProgramCache]: Analyzing trace with hash 587292924, now seen corresponding path program 29 times [2021-03-10 21:29:16,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:16,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578612180] [2021-03-10 21:29:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:16,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578612180] [2021-03-10 21:29:16,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240841156] [2021-03-10 21:29:16,103 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 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 21:29:16,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:16,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:16,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:16,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:16,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:16,288 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 21:29:16,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:16,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:16,342 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 21:29:16,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-03-10 21:29:16,413 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-03-10 21:29:16,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:16,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:16,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243381774] [2021-03-10 21:29:16,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:16,445 INFO L87 Difference]: Start difference. First operand 82 states and 210 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 21:29:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:16,820 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-03-10 21:29:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:16,821 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 15 [2021-03-10 21:29:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:16,821 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:29:16,821 INFO L226 Difference]: Without dead ends: 130 [2021-03-10 21:29:16,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-03-10 21:29:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-03-10 21:29:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-03-10 21:29:16,825 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-03-10 21:29:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:16,825 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-03-10 21:29:16,825 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 21:29:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-03-10 21:29:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:16,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:16,826 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:17,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-03-10 21:29:17,046 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1202957240, now seen corresponding path program 30 times [2021-03-10 21:29:17,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:17,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214164414] [2021-03-10 21:29:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214164414] [2021-03-10 21:29:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165947698] [2021-03-10 21:29:17,130 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 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 21:29:17,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:17,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:17,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:17,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:17,315 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 21:29:17,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:17,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:17,370 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 21:29:17,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:17,455 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:17,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:17,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:17,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:17,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560558961] [2021-03-10 21:29:17,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:17,483 INFO L87 Difference]: Start difference. First operand 82 states and 210 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 21:29:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:17,910 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-03-10 21:29:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:17,911 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 15 [2021-03-10 21:29:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:17,911 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:29:17,911 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:29:17,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:29:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-03-10 21:29:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-03-10 21:29:17,914 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-03-10 21:29:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:17,914 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-03-10 21:29:17,914 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 21:29:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-03-10 21:29:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:17,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:17,915 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:18,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-10 21:29:18,127 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:18,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2134830661, now seen corresponding path program 31 times [2021-03-10 21:29:18,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:18,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86184576] [2021-03-10 21:29:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:18,157 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 21:29:18,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86184576] [2021-03-10 21:29:18,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602795670] [2021-03-10 21:29:18,158 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 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 21:29:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:29:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:18,211 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 21:29:18,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:18,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:29:18,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376547851] [2021-03-10 21:29:18,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:18,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:18,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:18,212 INFO L87 Difference]: Start difference. First operand 84 states and 215 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 21:29:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:18,287 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-03-10 21:29:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:18,288 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 21:29:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:18,289 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:29:18,289 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:29:18,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:29:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-03-10 21:29:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-03-10 21:29:18,292 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-03-10 21:29:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:18,292 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-03-10 21:29:18,292 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 21:29:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-03-10 21:29:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:18,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:18,293 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:18,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-03-10 21:29:18,494 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:18,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1513780834, now seen corresponding path program 32 times [2021-03-10 21:29:18,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:18,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812015254] [2021-03-10 21:29:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:18,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812015254] [2021-03-10 21:29:18,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755851675] [2021-03-10 21:29:18,611 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:18,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:18,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:18,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:18,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:18,804 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 21:29:18,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:18,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:18,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:18,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:18,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:18,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:18,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544335873] [2021-03-10 21:29:18,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:18,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:18,833 INFO L87 Difference]: Start difference. First operand 93 states and 246 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 21:29:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:19,058 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-03-10 21:29:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:19,058 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 15 [2021-03-10 21:29:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:19,059 INFO L225 Difference]: With dead ends: 107 [2021-03-10 21:29:19,059 INFO L226 Difference]: Without dead ends: 98 [2021-03-10 21:29:19,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-03-10 21:29:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-03-10 21:29:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-03-10 21:29:19,061 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-03-10 21:29:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:19,062 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-03-10 21:29:19,062 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 21:29:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-03-10 21:29:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:19,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:19,062 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:19,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:19,277 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash -770197474, now seen corresponding path program 33 times [2021-03-10 21:29:19,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:19,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671231274] [2021-03-10 21:29:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:19,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671231274] [2021-03-10 21:29:19,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131037187] [2021-03-10 21:29:19,379 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:19,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:19,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:19,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:19,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:19,557 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 21:29:19,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:19,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:19,611 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 21:29:19,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:19,709 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:19,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:19,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:19,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:19,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:19,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473300480] [2021-03-10 21:29:19,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:19,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:19,742 INFO L87 Difference]: Start difference. First operand 93 states and 245 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 21:29:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:20,097 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-03-10 21:29:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:20,097 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 15 [2021-03-10 21:29:20,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:20,098 INFO L225 Difference]: With dead ends: 135 [2021-03-10 21:29:20,098 INFO L226 Difference]: Without dead ends: 125 [2021-03-10 21:29:20,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-03-10 21:29:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-03-10 21:29:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-03-10 21:29:20,101 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-03-10 21:29:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:20,101 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-03-10 21:29:20,101 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 21:29:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-03-10 21:29:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:20,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:20,101 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:20,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-03-10 21:29:20,315 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash 80946658, now seen corresponding path program 34 times [2021-03-10 21:29:20,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:20,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422661900] [2021-03-10 21:29:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422661900] [2021-03-10 21:29:20,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553667699] [2021-03-10 21:29:20,388 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 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 21:29:20,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:20,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:20,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:20,585 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 21:29:20,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:20,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:20,644 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 21:29:20,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:20,718 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:20,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:20,719 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:20,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033148229] [2021-03-10 21:29:20,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:20,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:20,750 INFO L87 Difference]: Start difference. First operand 93 states and 245 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 21:29:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:21,109 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-03-10 21:29:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:21,109 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 15 [2021-03-10 21:29:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:21,110 INFO L225 Difference]: With dead ends: 158 [2021-03-10 21:29:21,110 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 21:29:21,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:29:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 21:29:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-03-10 21:29:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-03-10 21:29:21,113 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-03-10 21:29:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:21,113 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-03-10 21:29:21,113 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 21:29:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-03-10 21:29:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:21,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:21,114 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:21,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,334 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:21,335 INFO L82 PathProgramCache]: Analyzing trace with hash 696610974, now seen corresponding path program 35 times [2021-03-10 21:29:21,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:21,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414660042] [2021-03-10 21:29:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414660042] [2021-03-10 21:29:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296732368] [2021-03-10 21:29:21,411 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:21,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:21,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:21,605 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 21:29:21,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:21,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:21,673 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 21:29:21,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-03-10 21:29:21,752 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-03-10 21:29:21,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:21,753 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:21,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:21,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15714460] [2021-03-10 21:29:21,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:21,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:21,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:21,783 INFO L87 Difference]: Start difference. First operand 93 states and 245 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 21:29:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:22,263 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-03-10 21:29:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:22,263 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 15 [2021-03-10 21:29:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:22,264 INFO L225 Difference]: With dead ends: 169 [2021-03-10 21:29:22,264 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:29:22,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:29:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:29:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-03-10 21:29:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-03-10 21:29:22,267 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-03-10 21:29:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:22,267 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-03-10 21:29:22,267 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 21:29:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-03-10 21:29:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:22,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:22,268 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:22,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:22,489 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1692631710, now seen corresponding path program 36 times [2021-03-10 21:29:22,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:22,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512794590] [2021-03-10 21:29:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:22,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512794590] [2021-03-10 21:29:22,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668953816] [2021-03-10 21:29:22,558 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 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 21:29:22,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:22,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:22,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:22,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:22,779 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 21:29:22,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:22,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:22,833 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 21:29:22,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:22,890 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:22,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:22,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:22,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:22,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344282638] [2021-03-10 21:29:22,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:22,917 INFO L87 Difference]: Start difference. First operand 93 states and 245 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 21:29:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:23,326 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-03-10 21:29:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:23,326 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 15 [2021-03-10 21:29:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:23,326 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:29:23,326 INFO L226 Difference]: Without dead ends: 130 [2021-03-10 21:29:23,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:29:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-03-10 21:29:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-03-10 21:29:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-03-10 21:29:23,329 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-03-10 21:29:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:23,330 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-03-10 21:29:23,330 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 21:29:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-03-10 21:29:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:23,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:23,330 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:23,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-03-10 21:29:23,552 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2103321349, now seen corresponding path program 37 times [2021-03-10 21:29:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:23,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996096093] [2021-03-10 21:29:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:23,578 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 21:29:23,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996096093] [2021-03-10 21:29:23,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532850367] [2021-03-10 21:29:23,578 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 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 21:29:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:29:23,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:23,634 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 21:29:23,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:23,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:29:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757645136] [2021-03-10 21:29:23,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:23,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:23,635 INFO L87 Difference]: Start difference. First operand 95 states and 248 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 21:29:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:23,736 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-03-10 21:29:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:23,736 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 21:29:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:23,737 INFO L225 Difference]: With dead ends: 170 [2021-03-10 21:29:23,737 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 21:29:23,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 21:29:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-03-10 21:29:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-03-10 21:29:23,740 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-03-10 21:29:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:23,740 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-03-10 21:29:23,741 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 21:29:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-03-10 21:29:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:23,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:23,741 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:23,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-03-10 21:29:23,955 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash -30645896, now seen corresponding path program 38 times [2021-03-10 21:29:23,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:23,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894202810] [2021-03-10 21:29:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:24,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894202810] [2021-03-10 21:29:24,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354807508] [2021-03-10 21:29:24,064 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 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 21:29:24,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:24,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:24,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:24,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:24,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:24,225 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 21:29:24,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:24,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:24,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:24,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:29:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:24,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:24,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:24,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429935306] [2021-03-10 21:29:24,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:24,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:24,260 INFO L87 Difference]: Start difference. First operand 102 states and 271 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 21:29:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:24,452 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-03-10 21:29:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:24,452 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 15 [2021-03-10 21:29:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:24,453 INFO L225 Difference]: With dead ends: 120 [2021-03-10 21:29:24,453 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 21:29:24,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 21:29:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-03-10 21:29:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-03-10 21:29:24,455 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-03-10 21:29:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:24,455 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-03-10 21:29:24,456 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 21:29:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-03-10 21:29:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:24,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:24,456 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:24,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-03-10 21:29:24,678 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash 712937464, now seen corresponding path program 39 times [2021-03-10 21:29:24,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:24,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185277371] [2021-03-10 21:29:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:24,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185277371] [2021-03-10 21:29:24,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532021991] [2021-03-10 21:29:24,785 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:24,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:24,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:24,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:24,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:24,942 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 21:29:24,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:25,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:25,005 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 21:29:25,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:25,061 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:25,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:25,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:25,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:25,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:25,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441106931] [2021-03-10 21:29:25,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:25,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:25,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:25,099 INFO L87 Difference]: Start difference. First operand 103 states and 274 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 21:29:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:25,387 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-03-10 21:29:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:25,387 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 15 [2021-03-10 21:29:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:25,388 INFO L225 Difference]: With dead ends: 154 [2021-03-10 21:29:25,388 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 21:29:25,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 21:29:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-03-10 21:29:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-03-10 21:29:25,391 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-03-10 21:29:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:25,391 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-03-10 21:29:25,391 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 21:29:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-03-10 21:29:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:25,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:25,391 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:25,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:25,613 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:25,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1564081596, now seen corresponding path program 40 times [2021-03-10 21:29:25,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:25,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552962529] [2021-03-10 21:29:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:25,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552962529] [2021-03-10 21:29:25,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433623398] [2021-03-10 21:29:25,684 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:25,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:25,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:25,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:25,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:25,834 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 21:29:25,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:25,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:25,893 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 21:29:25,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-03-10 21:29:25,959 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-03-10 21:29:25,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:25,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:25,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:25,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247835367] [2021-03-10 21:29:25,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:25,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:25,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:25,988 INFO L87 Difference]: Start difference. First operand 102 states and 271 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 21:29:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:26,470 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-03-10 21:29:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:26,471 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 15 [2021-03-10 21:29:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:26,471 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:29:26,471 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:29:26,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:29:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:29:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-03-10 21:29:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-03-10 21:29:26,474 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-03-10 21:29:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-03-10 21:29:26,474 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 21:29:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-03-10 21:29:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:26,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:26,475 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:26,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:26,691 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 902817813, now seen corresponding path program 41 times [2021-03-10 21:29:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:26,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745917201] [2021-03-10 21:29:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:26,719 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 21:29:26,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745917201] [2021-03-10 21:29:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887963076] [2021-03-10 21:29:26,720 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 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 21:29:26,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:26,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:26,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:29:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:26,763 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 21:29:26,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:26,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:29:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961364538] [2021-03-10 21:29:26,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:29:26,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:26,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:29:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:29:26,764 INFO L87 Difference]: Start difference. First operand 103 states and 274 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 21:29:26,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:26,805 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-03-10 21:29:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:29:26,805 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 21:29:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:26,806 INFO L225 Difference]: With dead ends: 196 [2021-03-10 21:29:26,806 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 21:29:26,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 21:29:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-03-10 21:29:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-03-10 21:29:26,809 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-03-10 21:29:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:26,809 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-03-10 21:29:26,809 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 21:29:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-03-10 21:29:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:26,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:26,810 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:27,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-03-10 21:29:27,032 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2115221384, now seen corresponding path program 42 times [2021-03-10 21:29:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:27,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216649839] [2021-03-10 21:29:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:27,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216649839] [2021-03-10 21:29:27,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556991984] [2021-03-10 21:29:27,102 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 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 21:29:27,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:27,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:27,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:27,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:27,280 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 21:29:27,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:27,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:27,335 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 21:29:27,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:27,416 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:27,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:27,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:27,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:27,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:27,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295014015] [2021-03-10 21:29:27,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:27,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:27,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:27,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:27,448 INFO L87 Difference]: Start difference. First operand 121 states and 332 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 21:29:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:27,964 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-03-10 21:29:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:27,964 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 15 [2021-03-10 21:29:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:27,965 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:29:27,965 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:29:27,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:29:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:29:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-03-10 21:29:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-03-10 21:29:27,968 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-03-10 21:29:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:27,968 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-03-10 21:29:27,968 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 21:29:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-03-10 21:29:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:27,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:27,969 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:28,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-03-10 21:29:28,187 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:28,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041989, now seen corresponding path program 43 times [2021-03-10 21:29:28,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:28,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362643493] [2021-03-10 21:29:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:28,217 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 21:29:28,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362643493] [2021-03-10 21:29:28,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687167553] [2021-03-10 21:29:28,218 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:29:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:28,282 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 21:29:28,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:28,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:29:28,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126903813] [2021-03-10 21:29:28,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:28,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:28,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:28,284 INFO L87 Difference]: Start difference. First operand 120 states and 329 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 21:29:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:28,355 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-03-10 21:29:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:28,355 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 21:29:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:28,356 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:29:28,356 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:29:28,356 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:29:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-03-10 21:29:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-03-10 21:29:28,359 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-03-10 21:29:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:28,359 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-03-10 21:29:28,359 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 21:29:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-03-10 21:29:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:28,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:28,360 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:28,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-03-10 21:29:28,571 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash -209496772, now seen corresponding path program 44 times [2021-03-10 21:29:28,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:28,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106501517] [2021-03-10 21:29:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:28,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106501517] [2021-03-10 21:29:28,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933614881] [2021-03-10 21:29:28,643 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:28,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:28,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:28,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:28,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:28,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:28,841 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 21:29:28,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:28,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:28,890 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 21:29:28,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:28,958 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:28,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:28,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:28,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:28,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:28,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495885942] [2021-03-10 21:29:28,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:28,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:28,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:28,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:28,992 INFO L87 Difference]: Start difference. First operand 114 states and 310 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 21:29:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:29,435 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-03-10 21:29:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:29,435 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 15 [2021-03-10 21:29:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:29,436 INFO L225 Difference]: With dead ends: 172 [2021-03-10 21:29:29,436 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 21:29:29,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 511.2ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:29:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 21:29:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-03-10 21:29:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-03-10 21:29:29,438 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-03-10 21:29:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:29,438 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-03-10 21:29:29,438 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 21:29:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-03-10 21:29:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:29,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:29,439 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:29,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-03-10 21:29:29,655 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash -620186411, now seen corresponding path program 45 times [2021-03-10 21:29:29,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:29,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70035127] [2021-03-10 21:29:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:29,686 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 21:29:29,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70035127] [2021-03-10 21:29:29,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256160293] [2021-03-10 21:29:29,687 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 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 21:29:29,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:29,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:29:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:29,739 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 21:29:29,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:29,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:29:29,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604534894] [2021-03-10 21:29:29,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:29,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:29,740 INFO L87 Difference]: Start difference. First operand 114 states and 310 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 21:29:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:29,823 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-03-10 21:29:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:29,823 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 21:29:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:29,824 INFO L225 Difference]: With dead ends: 175 [2021-03-10 21:29:29,824 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 21:29:29,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 21:29:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-03-10 21:29:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-03-10 21:29:29,827 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-03-10 21:29:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:29,827 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-03-10 21:29:29,827 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 21:29:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-03-10 21:29:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:29,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:29,827 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:30,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-03-10 21:29:30,049 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1261575944, now seen corresponding path program 46 times [2021-03-10 21:29:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:30,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83011363] [2021-03-10 21:29:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:30,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83011363] [2021-03-10 21:29:30,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861556830] [2021-03-10 21:29:30,130 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:30,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:30,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:30,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:29:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:30,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:30,336 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 21:29:30,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:30,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:30,384 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 21:29:30,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:29:30,446 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:29:30,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:29:30,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-03-10 21:29:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:30,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:30,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:30,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943785907] [2021-03-10 21:29:30,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:30,478 INFO L87 Difference]: Start difference. First operand 114 states and 310 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 21:29:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:30,915 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-03-10 21:29:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:30,915 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 15 [2021-03-10 21:29:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:30,916 INFO L225 Difference]: With dead ends: 162 [2021-03-10 21:29:30,916 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 21:29:30,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:29:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 21:29:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-03-10 21:29:30,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-03-10 21:29:30,918 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-03-10 21:29:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:30,918 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-03-10 21:29:30,919 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 21:29:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-03-10 21:29:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:29:30,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:30,919 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:31,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-03-10 21:29:31,127 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:31,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1126532677, now seen corresponding path program 47 times [2021-03-10 21:29:31,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:31,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218835679] [2021-03-10 21:29:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:31,163 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 21:29:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218835679] [2021-03-10 21:29:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151833506] [2021-03-10 21:29:31,163 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 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 21:29:31,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:31,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:31,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:29:31,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:31,216 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 21:29:31,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:31,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:29:31,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213079483] [2021-03-10 21:29:31,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:31,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:31,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:31,217 INFO L87 Difference]: Start difference. First operand 116 states and 313 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 21:29:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:31,306 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-03-10 21:29:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:31,306 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 21:29:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:31,307 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:29:31,307 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 21:29:31,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 21:29:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-03-10 21:29:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-03-10 21:29:31,310 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-03-10 21:29:31,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:31,310 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-03-10 21:29:31,310 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 21:29:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-03-10 21:29:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:31,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:31,310 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:31,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable870,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:31,523 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:31,523 INFO L82 PathProgramCache]: Analyzing trace with hash -43188332, now seen corresponding path program 48 times [2021-03-10 21:29:31,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:31,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324558970] [2021-03-10 21:29:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:31,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324558970] [2021-03-10 21:29:31,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280830716] [2021-03-10 21:29:31,593 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 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 21:29:31,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:31,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:29:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:31,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:31,783 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 21:29:31,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:31,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:31,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:31,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:31,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:31,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374966991] [2021-03-10 21:29:31,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:31,830 INFO L87 Difference]: Start difference. First operand 122 states and 331 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 21:29:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:32,070 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-03-10 21:29:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:32,071 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 16 [2021-03-10 21:29:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:32,071 INFO L225 Difference]: With dead ends: 161 [2021-03-10 21:29:32,071 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:29:32,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:29:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-03-10 21:29:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-03-10 21:29:32,074 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-03-10 21:29:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:32,074 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-03-10 21:29:32,074 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 21:29:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-03-10 21:29:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:32,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:32,075 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:32,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-03-10 21:29:32,287 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash 343012782, now seen corresponding path program 49 times [2021-03-10 21:29:32,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:32,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979128790] [2021-03-10 21:29:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:32,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979128790] [2021-03-10 21:29:32,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642828799] [2021-03-10 21:29:32,362 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:29:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:32,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:32,576 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 21:29:32,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:32,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:32,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:32,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:32,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:32,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856496097] [2021-03-10 21:29:32,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:32,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:32,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:32,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:32,637 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:32,911 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-03-10 21:29:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:32,912 INFO L225 Difference]: With dead ends: 174 [2021-03-10 21:29:32,912 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 21:29:32,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 21:29:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-03-10 21:29:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-03-10 21:29:32,914 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-03-10 21:29:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:32,914 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-03-10 21:29:32,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-03-10 21:29:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:32,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:32,915 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:33,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:33,132 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash -318251001, now seen corresponding path program 50 times [2021-03-10 21:29:33,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:33,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76950135] [2021-03-10 21:29:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:33,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76950135] [2021-03-10 21:29:33,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546921665] [2021-03-10 21:29:33,161 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:33,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:33,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:33,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:33,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:29:33,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424826222] [2021-03-10 21:29:33,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:33,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:33,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:33,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:33,212 INFO L87 Difference]: Start difference. First operand 134 states and 367 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 21:29:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:33,251 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-03-10 21:29:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:33,251 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 16 [2021-03-10 21:29:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:33,253 INFO L225 Difference]: With dead ends: 261 [2021-03-10 21:29:33,253 INFO L226 Difference]: Without dead ends: 261 [2021-03-10 21:29:33,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-03-10 21:29:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-03-10 21:29:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 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 21:29:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-03-10 21:29:33,256 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-03-10 21:29:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:33,256 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-03-10 21:29:33,256 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 21:29:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-03-10 21:29:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:33,256 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:33,256 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:33,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable922 [2021-03-10 21:29:33,472 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:33,472 INFO L82 PathProgramCache]: Analyzing trace with hash -713859132, now seen corresponding path program 51 times [2021-03-10 21:29:33,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:33,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665056393] [2021-03-10 21:29:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:33,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665056393] [2021-03-10 21:29:33,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931737088] [2021-03-10 21:29:33,543 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 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 21:29:33,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:33,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:33,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:29:33,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:33,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:33,761 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 21:29:33,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:33,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:33,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:33,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:33,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:33,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:33,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041140204] [2021-03-10 21:29:33,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:33,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:33,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:33,806 INFO L87 Difference]: Start difference. First operand 136 states and 374 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 21:29:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:34,017 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-03-10 21:29:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:34,018 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 16 [2021-03-10 21:29:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:34,018 INFO L225 Difference]: With dead ends: 173 [2021-03-10 21:29:34,018 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:29:34,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:29:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-03-10 21:29:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 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 21:29:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-03-10 21:29:34,025 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-03-10 21:29:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:34,026 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-03-10 21:29:34,026 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 21:29:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-03-10 21:29:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:34,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:34,026 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:34,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:34,241 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:34,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1841255225, now seen corresponding path program 52 times [2021-03-10 21:29:34,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:34,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326741749] [2021-03-10 21:29:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326741749] [2021-03-10 21:29:34,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183509348] [2021-03-10 21:29:34,283 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 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 21:29:34,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:34,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:34,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996981472] [2021-03-10 21:29:34,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:34,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:34,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:34,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:34,351 INFO L87 Difference]: Start difference. First operand 136 states and 374 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 21:29:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:34,420 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-03-10 21:29:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:34,421 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 16 [2021-03-10 21:29:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:34,422 INFO L225 Difference]: With dead ends: 272 [2021-03-10 21:29:34,422 INFO L226 Difference]: Without dead ends: 272 [2021-03-10 21:29:34,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-03-10 21:29:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-03-10 21:29:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 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 21:29:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-03-10 21:29:34,427 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-03-10 21:29:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:34,427 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-03-10 21:29:34,427 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 21:29:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-03-10 21:29:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:34,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:34,428 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:34,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable947 [2021-03-10 21:29:34,649 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1220205398, now seen corresponding path program 53 times [2021-03-10 21:29:34,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:34,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687897707] [2021-03-10 21:29:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687897707] [2021-03-10 21:29:34,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664819587] [2021-03-10 21:29:34,726 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:34,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:34,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:29:34,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:34,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:34,935 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 21:29:34,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:34,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:34,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:34,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:34,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:34,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723603919] [2021-03-10 21:29:34,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:34,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:34,988 INFO L87 Difference]: Start difference. First operand 136 states and 374 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 21:29:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:35,172 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-03-10 21:29:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:35,172 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 16 [2021-03-10 21:29:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:35,173 INFO L225 Difference]: With dead ends: 152 [2021-03-10 21:29:35,173 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:29:35,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:29:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-03-10 21:29:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-03-10 21:29:35,176 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-03-10 21:29:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:35,176 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-03-10 21:29:35,176 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 21:29:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-03-10 21:29:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:35,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:35,176 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:35,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:35,395 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1947365805, now seen corresponding path program 54 times [2021-03-10 21:29:35,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:35,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605151439] [2021-03-10 21:29:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605151439] [2021-03-10 21:29:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426996773] [2021-03-10 21:29:35,428 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 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 21:29:35,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:35,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:35,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:35,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:35,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206451748] [2021-03-10 21:29:35,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:35,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:35,473 INFO L87 Difference]: Start difference. First operand 134 states and 369 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 21:29:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:35,526 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-03-10 21:29:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:35,527 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 16 [2021-03-10 21:29:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:35,527 INFO L225 Difference]: With dead ends: 271 [2021-03-10 21:29:35,527 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:29:35,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:29:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-03-10 21:29:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-03-10 21:29:35,530 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-03-10 21:29:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:35,530 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-03-10 21:29:35,530 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 21:29:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-03-10 21:29:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:35,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:35,530 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:35,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-03-10 21:29:35,731 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:35,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1809745913, now seen corresponding path program 55 times [2021-03-10 21:29:35,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:35,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714094261] [2021-03-10 21:29:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714094261] [2021-03-10 21:29:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442071307] [2021-03-10 21:29:35,764 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 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 21:29:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:35,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:35,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218199610] [2021-03-10 21:29:35,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:35,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:35,818 INFO L87 Difference]: Start difference. First operand 137 states and 382 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 21:29:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:35,907 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-03-10 21:29:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:35,907 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 16 [2021-03-10 21:29:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:35,908 INFO L225 Difference]: With dead ends: 294 [2021-03-10 21:29:35,908 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:29:35,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:29:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-03-10 21:29:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-03-10 21:29:35,911 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-03-10 21:29:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:35,911 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-03-10 21:29:35,911 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 21:29:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-03-10 21:29:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:35,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:35,912 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:36,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,127 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash 262929540, now seen corresponding path program 56 times [2021-03-10 21:29:36,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:36,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328066351] [2021-03-10 21:29:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:36,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328066351] [2021-03-10 21:29:36,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068952113] [2021-03-10 21:29:36,198 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:36,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:36,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:29:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:36,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:36,385 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 21:29:36,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:36,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:36,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:36,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:36,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:36,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:36,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862116377] [2021-03-10 21:29:36,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:36,429 INFO L87 Difference]: Start difference. First operand 138 states and 383 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 21:29:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:36,612 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-03-10 21:29:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:36,612 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 16 [2021-03-10 21:29:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:36,613 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:29:36,613 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 21:29:36,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 21:29:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-03-10 21:29:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-03-10 21:29:36,615 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-03-10 21:29:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:36,615 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-03-10 21:29:36,615 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 21:29:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-03-10 21:29:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:36,615 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:36,615 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:36,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-03-10 21:29:36,827 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1196393249, now seen corresponding path program 57 times [2021-03-10 21:29:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:36,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075942861] [2021-03-10 21:29:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075942861] [2021-03-10 21:29:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335751680] [2021-03-10 21:29:36,860 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:36,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:36,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:36,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:29:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931439618] [2021-03-10 21:29:36,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:29:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:29:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:29:36,925 INFO L87 Difference]: Start difference. First operand 139 states and 387 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 21:29:36,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:36,964 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-03-10 21:29:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:29:36,965 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 16 [2021-03-10 21:29:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:36,966 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:29:36,966 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 21:29:36,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 21:29:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-03-10 21:29:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-03-10 21:29:36,969 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-03-10 21:29:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:36,969 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-03-10 21:29:36,969 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 21:29:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-03-10 21:29:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:36,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:36,970 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:37,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-03-10 21:29:37,183 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash -864466553, now seen corresponding path program 58 times [2021-03-10 21:29:37,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:37,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968054531] [2021-03-10 21:29:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968054531] [2021-03-10 21:29:37,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525264218] [2021-03-10 21:29:37,223 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 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 21:29:37,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:37,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:37,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181770956] [2021-03-10 21:29:37,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:37,271 INFO L87 Difference]: Start difference. First operand 156 states and 442 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 21:29:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:37,321 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-03-10 21:29:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:37,322 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 16 [2021-03-10 21:29:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:37,322 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:29:37,323 INFO L226 Difference]: Without dead ends: 263 [2021-03-10 21:29:37,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-03-10 21:29:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-03-10 21:29:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-03-10 21:29:37,325 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-03-10 21:29:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:37,326 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-03-10 21:29:37,326 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 21:29:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-03-10 21:29:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:37,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:37,326 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:37,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-03-10 21:29:37,548 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -326610975, now seen corresponding path program 59 times [2021-03-10 21:29:37,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:37,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225364242] [2021-03-10 21:29:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225364242] [2021-03-10 21:29:37,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30803393] [2021-03-10 21:29:37,580 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 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 21:29:37,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:29:37,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:37,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:37,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:37,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617807410] [2021-03-10 21:29:37,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:37,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:37,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:37,627 INFO L87 Difference]: Start difference. First operand 145 states and 405 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 21:29:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:37,722 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-03-10 21:29:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:37,722 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 16 [2021-03-10 21:29:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:37,724 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:29:37,724 INFO L226 Difference]: Without dead ends: 279 [2021-03-10 21:29:37,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-03-10 21:29:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-03-10 21:29:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-03-10 21:29:37,727 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-03-10 21:29:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:37,727 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-03-10 21:29:37,728 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 21:29:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-03-10 21:29:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:37,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:37,728 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:37,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable998,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:37,943 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:37,944 INFO L82 PathProgramCache]: Analyzing trace with hash -832957241, now seen corresponding path program 60 times [2021-03-10 21:29:37,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:37,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585895651] [2021-03-10 21:29:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585895651] [2021-03-10 21:29:37,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637242000] [2021-03-10 21:29:37,973 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 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 21:29:37,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:37,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:37,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:38,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:38,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:38,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365427564] [2021-03-10 21:29:38,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:38,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:38,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:38,022 INFO L87 Difference]: Start difference. First operand 139 states and 386 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 21:29:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:38,134 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-03-10 21:29:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:38,134 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 16 [2021-03-10 21:29:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:38,135 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:29:38,135 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:29:38,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:29:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-03-10 21:29:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-03-10 21:29:38,144 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-03-10 21:29:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:38,144 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-03-10 21:29:38,144 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 21:29:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-03-10 21:29:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:38,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:38,144 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:38,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:38,359 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1004527638, now seen corresponding path program 61 times [2021-03-10 21:29:38,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:38,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214318824] [2021-03-10 21:29:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:38,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214318824] [2021-03-10 21:29:38,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815704138] [2021-03-10 21:29:38,440 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 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 21:29:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:29:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:38,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:38,611 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 21:29:38,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:38,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:38,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:38,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:38,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:38,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:38,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360377274] [2021-03-10 21:29:38,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:38,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:38,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:38,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:38,663 INFO L87 Difference]: Start difference. First operand 137 states and 380 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 21:29:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:38,877 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-03-10 21:29:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:38,877 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 16 [2021-03-10 21:29:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:38,878 INFO L225 Difference]: With dead ends: 184 [2021-03-10 21:29:38,878 INFO L226 Difference]: Without dead ends: 179 [2021-03-10 21:29:38,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-03-10 21:29:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-03-10 21:29:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-03-10 21:29:38,881 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-03-10 21:29:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:38,881 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-03-10 21:29:38,881 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 21:29:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-03-10 21:29:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:38,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:38,882 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:39,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-03-10 21:29:39,094 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash 590199854, now seen corresponding path program 62 times [2021-03-10 21:29:39,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:39,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899102071] [2021-03-10 21:29:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899102071] [2021-03-10 21:29:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264275984] [2021-03-10 21:29:39,168 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 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 21:29:39,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:39,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:39,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:29:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:39,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:39,348 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 21:29:39,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:39,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:39,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:39,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:29:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:39,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:29:39,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846775838] [2021-03-10 21:29:39,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:39,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:39,408 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:39,705 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-03-10 21:29:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:39,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:39,706 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:29:39,706 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 21:29:39,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 21:29:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-03-10 21:29:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-03-10 21:29:39,709 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-03-10 21:29:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:39,709 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-03-10 21:29:39,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-03-10 21:29:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:39,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:39,709 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:39,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-03-10 21:29:39,910 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:39,910 INFO L82 PathProgramCache]: Analyzing trace with hash -71063929, now seen corresponding path program 63 times [2021-03-10 21:29:39,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:39,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273100123] [2021-03-10 21:29:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273100123] [2021-03-10 21:29:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455181961] [2021-03-10 21:29:39,942 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:39,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:39,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:39,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:39,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338731749] [2021-03-10 21:29:39,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:39,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:39,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:39,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:39,992 INFO L87 Difference]: Start difference. First operand 151 states and 431 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 21:29:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:40,035 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-03-10 21:29:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:40,035 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 16 [2021-03-10 21:29:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:40,036 INFO L225 Difference]: With dead ends: 269 [2021-03-10 21:29:40,036 INFO L226 Difference]: Without dead ends: 269 [2021-03-10 21:29:40,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-03-10 21:29:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-03-10 21:29:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-03-10 21:29:40,039 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-03-10 21:29:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,040 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-03-10 21:29:40,040 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 21:29:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-03-10 21:29:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:40,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,040 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:40,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-03-10 21:29:40,259 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2131923731, now seen corresponding path program 64 times [2021-03-10 21:29:40,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:40,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991941285] [2021-03-10 21:29:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:40,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991941285] [2021-03-10 21:29:40,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626758163] [2021-03-10 21:29:40,294 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 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 21:29:40,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:40,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:40,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:40,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:40,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069821479] [2021-03-10 21:29:40,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:40,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:40,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:40,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:40,337 INFO L87 Difference]: Start difference. First operand 158 states and 455 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 21:29:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:40,382 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-03-10 21:29:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:29:40,382 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 16 [2021-03-10 21:29:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:40,383 INFO L225 Difference]: With dead ends: 244 [2021-03-10 21:29:40,383 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:29:40,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:29:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-03-10 21:29:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-03-10 21:29:40,386 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-03-10 21:29:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,386 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-03-10 21:29:40,386 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 21:29:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-03-10 21:29:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:40,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,387 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:40,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-03-10 21:29:40,608 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:40,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1594068153, now seen corresponding path program 65 times [2021-03-10 21:29:40,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:40,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179514226] [2021-03-10 21:29:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:40,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179514226] [2021-03-10 21:29:40,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091668503] [2021-03-10 21:29:40,645 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 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 21:29:40,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:40,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:40,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:40,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:40,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:40,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796715378] [2021-03-10 21:29:40,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:40,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:40,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:40,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:40,698 INFO L87 Difference]: Start difference. First operand 175 states and 508 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 21:29:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:40,777 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-03-10 21:29:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:40,778 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 16 [2021-03-10 21:29:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:40,778 INFO L225 Difference]: With dead ends: 268 [2021-03-10 21:29:40,778 INFO L226 Difference]: Without dead ends: 268 [2021-03-10 21:29:40,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-03-10 21:29:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-03-10 21:29:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-03-10 21:29:40,782 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-03-10 21:29:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,782 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-03-10 21:29:40,782 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 21:29:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-03-10 21:29:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:40,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,782 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:41,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,003 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2100414419, now seen corresponding path program 66 times [2021-03-10 21:29:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:41,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742335161] [2021-03-10 21:29:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742335161] [2021-03-10 21:29:41,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773901367] [2021-03-10 21:29:41,037 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 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 21:29:41,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:41,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:41,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921031095] [2021-03-10 21:29:41,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:41,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:41,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:41,098 INFO L87 Difference]: Start difference. First operand 172 states and 498 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 21:29:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:41,193 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-03-10 21:29:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:41,193 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 16 [2021-03-10 21:29:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:41,194 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:29:41,194 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:29:41,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:29:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-03-10 21:29:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-03-10 21:29:41,198 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-03-10 21:29:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:41,198 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-03-10 21:29:41,198 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 21:29:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-03-10 21:29:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:29:41,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:41,199 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:41,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-03-10 21:29:41,417 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -617279481, now seen corresponding path program 67 times [2021-03-10 21:29:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:41,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440439231] [2021-03-10 21:29:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440439231] [2021-03-10 21:29:41,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992913652] [2021-03-10 21:29:41,455 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:41,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457577958] [2021-03-10 21:29:41,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:41,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:41,507 INFO L87 Difference]: Start difference. First operand 172 states and 498 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 21:29:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:41,609 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-03-10 21:29:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:41,610 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 16 [2021-03-10 21:29:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:41,610 INFO L225 Difference]: With dead ends: 261 [2021-03-10 21:29:41,610 INFO L226 Difference]: Without dead ends: 261 [2021-03-10 21:29:41,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-03-10 21:29:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-03-10 21:29:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-03-10 21:29:41,614 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-03-10 21:29:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:41,614 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-03-10 21:29:41,614 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 21:29:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-03-10 21:29:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:41,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:41,615 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:41,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,819 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash 467715592, now seen corresponding path program 68 times [2021-03-10 21:29:41,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:41,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778914245] [2021-03-10 21:29:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778914245] [2021-03-10 21:29:41,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74620137] [2021-03-10 21:29:41,867 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 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 21:29:41,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:41,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:41,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:41,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944763207] [2021-03-10 21:29:41,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:41,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:41,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:41,922 INFO L87 Difference]: Start difference. First operand 179 states and 519 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 21:29:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:41,997 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-03-10 21:29:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:41,998 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 21:29:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:41,999 INFO L225 Difference]: With dead ends: 282 [2021-03-10 21:29:41,999 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:29:41,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:29:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2021-03-10 21:29:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-03-10 21:29:42,002 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-03-10 21:29:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:42,002 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-03-10 21:29:42,002 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 21:29:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-03-10 21:29:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:42,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:42,003 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:42,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1072,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:42,207 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1312212869, now seen corresponding path program 69 times [2021-03-10 21:29:42,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:42,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912399824] [2021-03-10 21:29:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912399824] [2021-03-10 21:29:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467230059] [2021-03-10 21:29:42,253 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 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 21:29:42,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:42,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:42,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:42,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350665197] [2021-03-10 21:29:42,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:42,307 INFO L87 Difference]: Start difference. First operand 190 states and 558 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 21:29:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:42,454 INFO L93 Difference]: Finished difference Result 315 states and 767 transitions. [2021-03-10 21:29:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:42,454 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 21:29:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:42,455 INFO L225 Difference]: With dead ends: 315 [2021-03-10 21:29:42,455 INFO L226 Difference]: Without dead ends: 308 [2021-03-10 21:29:42,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-03-10 21:29:42,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2021-03-10 21:29:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-03-10 21:29:42,461 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-03-10 21:29:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:42,462 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-03-10 21:29:42,462 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 21:29:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-03-10 21:29:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:42,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:42,462 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:42,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:42,680 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash 853916706, now seen corresponding path program 70 times [2021-03-10 21:29:42,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:42,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381168606] [2021-03-10 21:29:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381168606] [2021-03-10 21:29:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269380614] [2021-03-10 21:29:42,718 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 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 21:29:42,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:42,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:42,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:42,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:42,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153880344] [2021-03-10 21:29:42,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:42,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:42,771 INFO L87 Difference]: Start difference. First operand 196 states and 572 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 21:29:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:42,859 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-03-10 21:29:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:42,860 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 21:29:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:42,860 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:29:42,860 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:29:42,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:29:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-03-10 21:29:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-03-10 21:29:42,863 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-03-10 21:29:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:42,863 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-03-10 21:29:42,864 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 21:29:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-03-10 21:29:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:42,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:42,864 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:43,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:43,067 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 192652923, now seen corresponding path program 71 times [2021-03-10 21:29:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:43,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814792576] [2021-03-10 21:29:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814792576] [2021-03-10 21:29:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077639901] [2021-03-10 21:29:43,113 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 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 21:29:43,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:43,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:43,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:43,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934091553] [2021-03-10 21:29:43,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:43,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:43,177 INFO L87 Difference]: Start difference. First operand 198 states and 572 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 21:29:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:43,226 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-03-10 21:29:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:43,227 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 21:29:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:43,228 INFO L225 Difference]: With dead ends: 310 [2021-03-10 21:29:43,228 INFO L226 Difference]: Without dead ends: 310 [2021-03-10 21:29:43,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-03-10 21:29:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-03-10 21:29:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-03-10 21:29:43,234 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-03-10 21:29:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:43,234 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-03-10 21:29:43,234 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 21:29:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-03-10 21:29:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:43,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:43,234 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:43,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:43,451 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2007436600, now seen corresponding path program 72 times [2021-03-10 21:29:43,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:43,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823679581] [2021-03-10 21:29:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823679581] [2021-03-10 21:29:43,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014012191] [2021-03-10 21:29:43,489 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 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 21:29:43,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:29:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:43,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:43,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:43,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288232999] [2021-03-10 21:29:43,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:43,540 INFO L87 Difference]: Start difference. First operand 188 states and 534 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 21:29:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:43,614 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-03-10 21:29:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:43,614 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 21:29:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:43,615 INFO L225 Difference]: With dead ends: 256 [2021-03-10 21:29:43,615 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 21:29:43,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:43,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 21:29:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-03-10 21:29:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-03-10 21:29:43,618 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-03-10 21:29:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:43,618 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-03-10 21:29:43,618 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 21:29:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-03-10 21:29:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:43,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:43,618 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:43,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:43,819 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1330351301, now seen corresponding path program 73 times [2021-03-10 21:29:43,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:43,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353264921] [2021-03-10 21:29:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353264921] [2021-03-10 21:29:43,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277229004] [2021-03-10 21:29:43,857 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 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 21:29:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:43,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:29:43,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126362228] [2021-03-10 21:29:43,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:43,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:43,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:43,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:43,908 INFO L87 Difference]: Start difference. First operand 197 states and 558 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 21:29:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:43,969 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-03-10 21:29:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:43,969 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 21:29:43,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:43,970 INFO L225 Difference]: With dead ends: 333 [2021-03-10 21:29:43,970 INFO L226 Difference]: Without dead ends: 333 [2021-03-10 21:29:43,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-03-10 21:29:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-03-10 21:29:43,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-03-10 21:29:43,978 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-03-10 21:29:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:43,978 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-03-10 21:29:43,978 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 21:29:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-03-10 21:29:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:43,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:43,980 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:44,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-03-10 21:29:44,195 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -888152350, now seen corresponding path program 74 times [2021-03-10 21:29:44,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:44,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624765102] [2021-03-10 21:29:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624765102] [2021-03-10 21:29:44,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819508960] [2021-03-10 21:29:44,240 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 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 21:29:44,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:44,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:44,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948722733] [2021-03-10 21:29:44,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:44,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:44,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:44,295 INFO L87 Difference]: Start difference. First operand 199 states and 565 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 21:29:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:44,373 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-03-10 21:29:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:44,374 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 21:29:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:44,375 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:29:44,375 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:29:44,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:29:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-03-10 21:29:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-03-10 21:29:44,378 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-03-10 21:29:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:44,378 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-03-10 21:29:44,378 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 21:29:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-03-10 21:29:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:44,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:44,379 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:44,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-03-10 21:29:44,583 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1298841989, now seen corresponding path program 75 times [2021-03-10 21:29:44,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:44,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228914883] [2021-03-10 21:29:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228914883] [2021-03-10 21:29:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293233904] [2021-03-10 21:29:44,630 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 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 21:29:44,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:29:44,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:44,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:44,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:44,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:44,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:44,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713239729] [2021-03-10 21:29:44,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:44,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:44,696 INFO L87 Difference]: Start difference. First operand 201 states and 567 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 21:29:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:44,787 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-03-10 21:29:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:44,787 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 21:29:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:44,788 INFO L225 Difference]: With dead ends: 348 [2021-03-10 21:29:44,788 INFO L226 Difference]: Without dead ends: 348 [2021-03-10 21:29:44,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-03-10 21:29:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-03-10 21:29:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-03-10 21:29:44,792 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-03-10 21:29:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:44,792 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-03-10 21:29:44,792 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 21:29:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-03-10 21:29:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:44,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:44,793 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-03-10 21:29:45,007 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash 773833464, now seen corresponding path program 76 times [2021-03-10 21:29:45,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63052304] [2021-03-10 21:29:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:45,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63052304] [2021-03-10 21:29:45,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912008259] [2021-03-10 21:29:45,032 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 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 21:29:45,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:45,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:29:45,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850100432] [2021-03-10 21:29:45,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:29:45,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:29:45,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:29:45,079 INFO L87 Difference]: Start difference. First operand 201 states and 567 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 21:29:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,112 INFO L93 Difference]: Finished difference Result 328 states and 825 transitions. [2021-03-10 21:29:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:29:45,113 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 17 [2021-03-10 21:29:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:45,114 INFO L225 Difference]: With dead ends: 328 [2021-03-10 21:29:45,114 INFO L226 Difference]: Without dead ends: 328 [2021-03-10 21:29:45,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-03-10 21:29:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 216. [2021-03-10 21:29:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.902325581395349) internal successors, (624), 215 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 624 transitions. [2021-03-10 21:29:45,117 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 624 transitions. Word has length 17 [2021-03-10 21:29:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:45,117 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 624 transitions. [2021-03-10 21:29:45,117 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 21:29:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 624 transitions. [2021-03-10 21:29:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:45,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:45,117 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-03-10 21:29:45,331 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash 854963749, now seen corresponding path program 77 times [2021-03-10 21:29:45,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943184479] [2021-03-10 21:29:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:45,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943184479] [2021-03-10 21:29:45,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775942499] [2021-03-10 21:29:45,361 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 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 21:29:45,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:45,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:45,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:29:45,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580557557] [2021-03-10 21:29:45,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:29:45,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:29:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:29:45,411 INFO L87 Difference]: Start difference. First operand 216 states and 624 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 21:29:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,510 INFO L93 Difference]: Finished difference Result 306 states and 770 transitions. [2021-03-10 21:29:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:45,510 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 17 [2021-03-10 21:29:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:45,511 INFO L225 Difference]: With dead ends: 306 [2021-03-10 21:29:45,512 INFO L226 Difference]: Without dead ends: 304 [2021-03-10 21:29:45,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-03-10 21:29:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 226. [2021-03-10 21:29:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-03-10 21:29:45,516 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-03-10 21:29:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:45,516 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-03-10 21:29:45,516 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 21:29:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-03-10 21:29:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:45,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:45,517 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,717 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,717 INFO L82 PathProgramCache]: Analyzing trace with hash -353562629, now seen corresponding path program 78 times [2021-03-10 21:29:45,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892121362] [2021-03-10 21:29:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892121362] [2021-03-10 21:29:45,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924903569] [2021-03-10 21:29:45,753 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:45,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:29:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:45,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:45,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722511640] [2021-03-10 21:29:45,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:45,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:45,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:45,822 INFO L87 Difference]: Start difference. First operand 226 states and 657 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 21:29:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,876 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-03-10 21:29:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:45,877 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 21:29:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:45,878 INFO L225 Difference]: With dead ends: 312 [2021-03-10 21:29:45,878 INFO L226 Difference]: Without dead ends: 312 [2021-03-10 21:29:45,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:29:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-03-10 21:29:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-03-10 21:29:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-03-10 21:29:45,881 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-03-10 21:29:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:45,881 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-03-10 21:29:45,881 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 21:29:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-03-10 21:29:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:45,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:45,881 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:46,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1082 [2021-03-10 21:29:46,082 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash 594982588, now seen corresponding path program 79 times [2021-03-10 21:29:46,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:46,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9648240] [2021-03-10 21:29:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9648240] [2021-03-10 21:29:46,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14023180] [2021-03-10 21:29:46,124 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:46,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:46,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125787667] [2021-03-10 21:29:46,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:46,176 INFO L87 Difference]: Start difference. First operand 225 states and 653 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 21:29:46,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:46,264 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-03-10 21:29:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:46,264 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 21:29:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:46,265 INFO L225 Difference]: With dead ends: 311 [2021-03-10 21:29:46,265 INFO L226 Difference]: Without dead ends: 299 [2021-03-10 21:29:46,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-03-10 21:29:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-03-10 21:29:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-03-10 21:29:46,268 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-03-10 21:29:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:46,268 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-03-10 21:29:46,268 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 21:29:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-03-10 21:29:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:46,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:46,269 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:46,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1083,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:46,471 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash 184292949, now seen corresponding path program 80 times [2021-03-10 21:29:46,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:46,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223265115] [2021-03-10 21:29:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223265115] [2021-03-10 21:29:46,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050328015] [2021-03-10 21:29:46,511 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 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 21:29:46,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:46,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:46,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:46,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:46,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342284258] [2021-03-10 21:29:46,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:46,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:46,581 INFO L87 Difference]: Start difference. First operand 227 states and 655 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 21:29:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:46,686 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-03-10 21:29:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:29:46,686 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 21:29:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:46,687 INFO L225 Difference]: With dead ends: 338 [2021-03-10 21:29:46,687 INFO L226 Difference]: Without dead ends: 338 [2021-03-10 21:29:46,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-03-10 21:29:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-03-10 21:29:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-03-10 21:29:46,692 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-03-10 21:29:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:46,692 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-03-10 21:29:46,692 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 21:29:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-03-10 21:29:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:46,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:46,692 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:46,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:46,914 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:46,914 INFO L82 PathProgramCache]: Analyzing trace with hash -457096584, now seen corresponding path program 81 times [2021-03-10 21:29:46,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:46,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880023862] [2021-03-10 21:29:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880023862] [2021-03-10 21:29:46,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234536415] [2021-03-10 21:29:46,951 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 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 21:29:46,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:46,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:46,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:46,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:46,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884092271] [2021-03-10 21:29:46,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:46,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:46,999 INFO L87 Difference]: Start difference. First operand 227 states and 655 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 21:29:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:47,081 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-03-10 21:29:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:47,081 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 21:29:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:47,082 INFO L225 Difference]: With dead ends: 329 [2021-03-10 21:29:47,082 INFO L226 Difference]: Without dead ends: 321 [2021-03-10 21:29:47,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-03-10 21:29:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-03-10 21:29:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-03-10 21:29:47,086 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-03-10 21:29:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:47,087 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-03-10 21:29:47,087 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 21:29:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-03-10 21:29:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:47,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:47,087 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:47,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:47,303 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash -322053317, now seen corresponding path program 82 times [2021-03-10 21:29:47,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:47,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424870887] [2021-03-10 21:29:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424870887] [2021-03-10 21:29:47,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91434158] [2021-03-10 21:29:47,340 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 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 21:29:47,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:47,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:47,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854568090] [2021-03-10 21:29:47,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:47,393 INFO L87 Difference]: Start difference. First operand 231 states and 662 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 21:29:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:47,523 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-03-10 21:29:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:47,523 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 21:29:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:47,524 INFO L225 Difference]: With dead ends: 375 [2021-03-10 21:29:47,524 INFO L226 Difference]: Without dead ends: 375 [2021-03-10 21:29:47,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:29:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-03-10 21:29:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-03-10 21:29:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-03-10 21:29:47,528 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-03-10 21:29:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:47,529 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-03-10 21:29:47,529 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 21:29:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-03-10 21:29:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:47,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:47,529 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:47,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:47,743 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash -493623714, now seen corresponding path program 83 times [2021-03-10 21:29:47,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:47,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917207713] [2021-03-10 21:29:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:47,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917207713] [2021-03-10 21:29:47,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256180287] [2021-03-10 21:29:47,777 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 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 21:29:47,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:47,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:47,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:47,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:47,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13604376] [2021-03-10 21:29:47,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:47,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:47,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:47,830 INFO L87 Difference]: Start difference. First operand 228 states and 651 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 21:29:47,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:47,876 INFO L93 Difference]: Finished difference Result 391 states and 994 transitions. [2021-03-10 21:29:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:47,877 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 21:29:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:47,878 INFO L225 Difference]: With dead ends: 391 [2021-03-10 21:29:47,878 INFO L226 Difference]: Without dead ends: 391 [2021-03-10 21:29:47,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-03-10 21:29:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2021-03-10 21:29:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.9686274509803923) internal successors, (757), 255 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 757 transitions. [2021-03-10 21:29:47,881 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 757 transitions. Word has length 17 [2021-03-10 21:29:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:47,882 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 757 transitions. [2021-03-10 21:29:47,882 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 21:29:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 757 transitions. [2021-03-10 21:29:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:47,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:47,882 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:48,083 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash -412493429, now seen corresponding path program 84 times [2021-03-10 21:29:48,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746916254] [2021-03-10 21:29:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746916254] [2021-03-10 21:29:48,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337507085] [2021-03-10 21:29:48,119 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 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 21:29:48,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:48,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:48,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:48,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:48,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:48,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953511094] [2021-03-10 21:29:48,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:48,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:48,162 INFO L87 Difference]: Start difference. First operand 256 states and 757 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 21:29:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:48,244 INFO L93 Difference]: Finished difference Result 374 states and 958 transitions. [2021-03-10 21:29:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:48,244 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 21:29:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:48,245 INFO L225 Difference]: With dead ends: 374 [2021-03-10 21:29:48,245 INFO L226 Difference]: Without dead ends: 372 [2021-03-10 21:29:48,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-10 21:29:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2021-03-10 21:29:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-03-10 21:29:48,249 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-03-10 21:29:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:48,249 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-03-10 21:29:48,249 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 21:29:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-03-10 21:29:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:48,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:48,250 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-03-10 21:29:48,460 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1101103778, now seen corresponding path program 85 times [2021-03-10 21:29:48,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061366283] [2021-03-10 21:29:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061366283] [2021-03-10 21:29:48,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951564229] [2021-03-10 21:29:48,490 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 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 21:29:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:48,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:48,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:48,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468140616] [2021-03-10 21:29:48,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:48,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:48,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:48,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:48,544 INFO L87 Difference]: Start difference. First operand 269 states and 805 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 21:29:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:48,646 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-03-10 21:29:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:48,647 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 21:29:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:48,648 INFO L225 Difference]: With dead ends: 394 [2021-03-10 21:29:48,648 INFO L226 Difference]: Without dead ends: 392 [2021-03-10 21:29:48,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-03-10 21:29:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-03-10 21:29:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-03-10 21:29:48,651 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-03-10 21:29:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:48,652 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-03-10 21:29:48,652 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 21:29:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-03-10 21:29:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:48,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:48,652 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-03-10 21:29:48,853 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,853 INFO L82 PathProgramCache]: Analyzing trace with hash 439839995, now seen corresponding path program 86 times [2021-03-10 21:29:48,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617444504] [2021-03-10 21:29:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:48,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617444504] [2021-03-10 21:29:48,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486122579] [2021-03-10 21:29:48,882 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 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 21:29:48,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:48,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:48,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:48,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:48,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:29:48,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200077814] [2021-03-10 21:29:48,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:29:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:29:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:29:48,950 INFO L87 Difference]: Start difference. First operand 269 states and 804 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 21:29:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:49,015 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-03-10 21:29:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:29:49,015 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 21:29:49,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:49,017 INFO L225 Difference]: With dead ends: 362 [2021-03-10 21:29:49,017 INFO L226 Difference]: Without dead ends: 362 [2021-03-10 21:29:49,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-03-10 21:29:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-03-10 21:29:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-03-10 21:29:49,022 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-03-10 21:29:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:49,022 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-03-10 21:29:49,022 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 21:29:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-03-10 21:29:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:49,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:49,022 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:49,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1090,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,239 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:49,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:49,239 INFO L82 PathProgramCache]: Analyzing trace with hash -672474590, now seen corresponding path program 87 times [2021-03-10 21:29:49,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:49,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491969829] [2021-03-10 21:29:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491969829] [2021-03-10 21:29:49,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71482796] [2021-03-10 21:29:49,279 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:29:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:49,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:49,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:49,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459540828] [2021-03-10 21:29:49,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:49,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:49,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:49,330 INFO L87 Difference]: Start difference. First operand 249 states and 735 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 21:29:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:49,416 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-03-10 21:29:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:49,417 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 21:29:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:49,418 INFO L225 Difference]: With dead ends: 356 [2021-03-10 21:29:49,418 INFO L226 Difference]: Without dead ends: 346 [2021-03-10 21:29:49,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-03-10 21:29:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-03-10 21:29:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-03-10 21:29:49,422 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-03-10 21:29:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:49,422 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-03-10 21:29:49,422 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 21:29:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-03-10 21:29:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:49,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:49,422 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:49,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,635 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1083164229, now seen corresponding path program 88 times [2021-03-10 21:29:49,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:49,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400159731] [2021-03-10 21:29:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400159731] [2021-03-10 21:29:49,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759053314] [2021-03-10 21:29:49,674 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 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 21:29:49,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:49,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:49,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:49,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:49,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:49,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205217456] [2021-03-10 21:29:49,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:49,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:49,718 INFO L87 Difference]: Start difference. First operand 263 states and 786 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 21:29:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:49,790 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-03-10 21:29:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:49,794 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 21:29:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:49,796 INFO L225 Difference]: With dead ends: 358 [2021-03-10 21:29:49,796 INFO L226 Difference]: Without dead ends: 358 [2021-03-10 21:29:49,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-03-10 21:29:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-03-10 21:29:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-03-10 21:29:49,800 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-03-10 21:29:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:49,800 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-03-10 21:29:49,800 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 21:29:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-03-10 21:29:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:49,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:49,801 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:50,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1092 [2021-03-10 21:29:50,001 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:50,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:50,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1724553762, now seen corresponding path program 89 times [2021-03-10 21:29:50,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:50,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782579645] [2021-03-10 21:29:50,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782579645] [2021-03-10 21:29:50,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248028709] [2021-03-10 21:29:50,038 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 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 21:29:50,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:50,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:50,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:50,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231997372] [2021-03-10 21:29:50,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:50,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:50,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:50,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:50,090 INFO L87 Difference]: Start difference. First operand 264 states and 788 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 21:29:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:50,188 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-03-10 21:29:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:50,188 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 21:29:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:50,190 INFO L225 Difference]: With dead ends: 377 [2021-03-10 21:29:50,190 INFO L226 Difference]: Without dead ends: 369 [2021-03-10 21:29:50,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-03-10 21:29:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-03-10 21:29:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-03-10 21:29:50,195 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-03-10 21:29:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:50,195 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-03-10 21:29:50,196 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 21:29:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-03-10 21:29:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:50,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:50,196 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:50,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,409 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510495, now seen corresponding path program 90 times [2021-03-10 21:29:50,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:50,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541497004] [2021-03-10 21:29:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541497004] [2021-03-10 21:29:50,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132985471] [2021-03-10 21:29:50,454 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 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 21:29:50,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:29:50,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:50,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:50,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709627947] [2021-03-10 21:29:50,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:50,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:50,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:50,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:50,520 INFO L87 Difference]: Start difference. First operand 264 states and 787 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 21:29:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:50,640 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-03-10 21:29:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:50,640 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 21:29:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:50,641 INFO L225 Difference]: With dead ends: 370 [2021-03-10 21:29:50,642 INFO L226 Difference]: Without dead ends: 370 [2021-03-10 21:29:50,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-03-10 21:29:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-03-10 21:29:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-03-10 21:29:50,646 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-03-10 21:29:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:50,646 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-03-10 21:29:50,646 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 21:29:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-03-10 21:29:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:50,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:50,647 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:50,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,851 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:50,851 INFO L82 PathProgramCache]: Analyzing trace with hash 20730274, now seen corresponding path program 91 times [2021-03-10 21:29:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:50,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310130223] [2021-03-10 21:29:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310130223] [2021-03-10 21:29:50,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347353469] [2021-03-10 21:29:50,901 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:50,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:50,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:50,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:50,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379727329] [2021-03-10 21:29:50,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:50,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:50,973 INFO L87 Difference]: Start difference. First operand 258 states and 769 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 21:29:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:51,040 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-03-10 21:29:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:51,040 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 21:29:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:51,041 INFO L225 Difference]: With dead ends: 319 [2021-03-10 21:29:51,041 INFO L226 Difference]: Without dead ends: 309 [2021-03-10 21:29:51,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-03-10 21:29:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-03-10 21:29:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-03-10 21:29:51,046 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-03-10 21:29:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:51,046 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-03-10 21:29:51,046 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 21:29:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-03-10 21:29:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:51,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:51,047 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:51,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-03-10 21:29:51,269 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:51,269 INFO L82 PathProgramCache]: Analyzing trace with hash -106375557, now seen corresponding path program 92 times [2021-03-10 21:29:51,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:51,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208522254] [2021-03-10 21:29:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208522254] [2021-03-10 21:29:51,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16762136] [2021-03-10 21:29:51,307 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 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 21:29:51,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:51,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:51,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:51,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:51,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287674256] [2021-03-10 21:29:51,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:51,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:51,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:51,363 INFO L87 Difference]: Start difference. First operand 258 states and 768 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 21:29:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:51,501 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-03-10 21:29:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:51,502 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 21:29:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:51,502 INFO L225 Difference]: With dead ends: 377 [2021-03-10 21:29:51,502 INFO L226 Difference]: Without dead ends: 377 [2021-03-10 21:29:51,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-03-10 21:29:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-03-10 21:29:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-03-10 21:29:51,505 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-03-10 21:29:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:51,505 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-03-10 21:29:51,506 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 21:29:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-03-10 21:29:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:51,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:51,506 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:51,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:51,706 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1130090568, now seen corresponding path program 93 times [2021-03-10 21:29:51,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:51,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607399138] [2021-03-10 21:29:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607399138] [2021-03-10 21:29:51,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254712454] [2021-03-10 21:29:51,744 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 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 21:29:51,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:29:51,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:51,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993936495] [2021-03-10 21:29:51,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:51,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:51,790 INFO L87 Difference]: Start difference. First operand 266 states and 791 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 21:29:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:51,838 INFO L93 Difference]: Finished difference Result 455 states and 1181 transitions. [2021-03-10 21:29:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:51,838 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 21:29:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:51,839 INFO L225 Difference]: With dead ends: 455 [2021-03-10 21:29:51,839 INFO L226 Difference]: Without dead ends: 455 [2021-03-10 21:29:51,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-03-10 21:29:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 307. [2021-03-10 21:29:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0784313725490198) internal successors, (942), 306 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 942 transitions. [2021-03-10 21:29:51,843 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 942 transitions. Word has length 17 [2021-03-10 21:29:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:51,843 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 942 transitions. [2021-03-10 21:29:51,843 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 21:29:51,843 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 942 transitions. [2021-03-10 21:29:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:51,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:51,844 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:52,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:52,045 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1048960283, now seen corresponding path program 94 times [2021-03-10 21:29:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:52,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991304333] [2021-03-10 21:29:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991304333] [2021-03-10 21:29:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292603471] [2021-03-10 21:29:52,085 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:52,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:52,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:52,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:52,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362627689] [2021-03-10 21:29:52,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:52,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:52,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:52,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:52,127 INFO L87 Difference]: Start difference. First operand 307 states and 942 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 21:29:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:52,232 INFO L93 Difference]: Finished difference Result 448 states and 1182 transitions. [2021-03-10 21:29:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:52,232 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 21:29:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:52,233 INFO L225 Difference]: With dead ends: 448 [2021-03-10 21:29:52,233 INFO L226 Difference]: Without dead ends: 446 [2021-03-10 21:29:52,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-10 21:29:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-03-10 21:29:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-03-10 21:29:52,237 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-03-10 21:29:52,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:52,237 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-03-10 21:29:52,237 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 21:29:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-03-10 21:29:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:52,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:52,237 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:52,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:52,438 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:52,438 INFO L82 PathProgramCache]: Analyzing trace with hash 464636924, now seen corresponding path program 95 times [2021-03-10 21:29:52,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:52,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444711359] [2021-03-10 21:29:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444711359] [2021-03-10 21:29:52,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015543658] [2021-03-10 21:29:52,473 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 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 21:29:52,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:52,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:52,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:52,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:52,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173248888] [2021-03-10 21:29:52,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:52,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:52,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:52,516 INFO L87 Difference]: Start difference. First operand 320 states and 992 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 21:29:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:52,608 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-03-10 21:29:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:52,609 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 21:29:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:52,609 INFO L225 Difference]: With dead ends: 458 [2021-03-10 21:29:52,609 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 21:29:52,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 21:29:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-03-10 21:29:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 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 21:29:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-03-10 21:29:52,613 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-03-10 21:29:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:52,613 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-03-10 21:29:52,614 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 21:29:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-03-10 21:29:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:52,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:52,614 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:52,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-03-10 21:29:52,814 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash -196626859, now seen corresponding path program 96 times [2021-03-10 21:29:52,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:52,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503588889] [2021-03-10 21:29:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503588889] [2021-03-10 21:29:52,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290847074] [2021-03-10 21:29:52,853 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 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 21:29:52,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:29:52,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:52,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:52,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:52,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:52,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720916923] [2021-03-10 21:29:52,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:52,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:52,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:52,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:52,900 INFO L87 Difference]: Start difference. First operand 309 states and 948 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 21:29:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:52,955 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-03-10 21:29:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:52,956 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 21:29:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:52,956 INFO L225 Difference]: With dead ends: 433 [2021-03-10 21:29:52,956 INFO L226 Difference]: Without dead ends: 433 [2021-03-10 21:29:52,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-03-10 21:29:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-03-10 21:29:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-03-10 21:29:52,961 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-03-10 21:29:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:52,961 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-03-10 21:29:52,961 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 21:29:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-03-10 21:29:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:52,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:52,962 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:53,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1100 [2021-03-10 21:29:53,162 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1080301240, now seen corresponding path program 97 times [2021-03-10 21:29:53,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:53,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767297663] [2021-03-10 21:29:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767297663] [2021-03-10 21:29:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132403970] [2021-03-10 21:29:53,202 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 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 21:29:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:53,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:53,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:53,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021840716] [2021-03-10 21:29:53,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:53,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:53,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:53,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:53,269 INFO L87 Difference]: Start difference. First operand 312 states and 955 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 21:29:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:53,375 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-03-10 21:29:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:53,376 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 21:29:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:53,377 INFO L225 Difference]: With dead ends: 472 [2021-03-10 21:29:53,377 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 21:29:53,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 21:29:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-03-10 21:29:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-03-10 21:29:53,383 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-03-10 21:29:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:53,383 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-03-10 21:29:53,383 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 21:29:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-03-10 21:29:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:53,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:53,383 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:53,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-03-10 21:29:53,605 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2037480635, now seen corresponding path program 98 times [2021-03-10 21:29:53,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:53,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708375332] [2021-03-10 21:29:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708375332] [2021-03-10 21:29:53,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460223414] [2021-03-10 21:29:53,651 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 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 21:29:53,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:53,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:53,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:53,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:53,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:53,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868482700] [2021-03-10 21:29:53,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:53,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:53,709 INFO L87 Difference]: Start difference. First operand 310 states and 949 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 21:29:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:53,791 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-03-10 21:29:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:29:53,792 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 21:29:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:53,793 INFO L225 Difference]: With dead ends: 407 [2021-03-10 21:29:53,793 INFO L226 Difference]: Without dead ends: 407 [2021-03-10 21:29:53,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-03-10 21:29:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-03-10 21:29:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 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 21:29:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-03-10 21:29:53,798 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-03-10 21:29:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:53,798 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-03-10 21:29:53,798 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 21:29:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-03-10 21:29:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:53,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:53,799 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:54,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1102,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:54,020 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1308941444, now seen corresponding path program 99 times [2021-03-10 21:29:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:54,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977972613] [2021-03-10 21:29:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977972613] [2021-03-10 21:29:54,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046327028] [2021-03-10 21:29:54,053 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 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 21:29:54,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:29:54,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:54,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:54,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:54,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:29:54,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133692564] [2021-03-10 21:29:54,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:29:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:29:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:29:54,097 INFO L87 Difference]: Start difference. First operand 318 states and 975 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 21:29:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:54,194 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-03-10 21:29:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:54,194 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 21:29:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:54,195 INFO L225 Difference]: With dead ends: 452 [2021-03-10 21:29:54,195 INFO L226 Difference]: Without dead ends: 446 [2021-03-10 21:29:54,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-10 21:29:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-03-10 21:29:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-03-10 21:29:54,199 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-03-10 21:29:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:54,199 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-03-10 21:29:54,199 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 21:29:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-03-10 21:29:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:54,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:54,199 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:54,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-03-10 21:29:54,400 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1933946680, now seen corresponding path program 100 times [2021-03-10 21:29:54,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:54,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796579577] [2021-03-10 21:29:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796579577] [2021-03-10 21:29:54,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849298171] [2021-03-10 21:29:54,439 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 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 21:29:54,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:54,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:54,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:54,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:54,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695280257] [2021-03-10 21:29:54,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:54,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:54,494 INFO L87 Difference]: Start difference. First operand 318 states and 974 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 21:29:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:54,593 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-03-10 21:29:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:54,593 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 21:29:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:54,594 INFO L225 Difference]: With dead ends: 444 [2021-03-10 21:29:54,594 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 21:29:54,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 21:29:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-03-10 21:29:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-03-10 21:29:54,598 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-03-10 21:29:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:54,598 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-03-10 21:29:54,598 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 21:29:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-03-10 21:29:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:54,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:54,598 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:54,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1104,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:54,799 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2068989947, now seen corresponding path program 101 times [2021-03-10 21:29:54,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:54,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322382907] [2021-03-10 21:29:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322382907] [2021-03-10 21:29:54,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554991816] [2021-03-10 21:29:54,845 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 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 21:29:54,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:29:54,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:54,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:54,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:54,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478976862] [2021-03-10 21:29:54,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:54,919 INFO L87 Difference]: Start difference. First operand 332 states and 1023 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 21:29:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:55,018 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-03-10 21:29:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:29:55,018 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 21:29:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:55,019 INFO L225 Difference]: With dead ends: 419 [2021-03-10 21:29:55,019 INFO L226 Difference]: Without dead ends: 419 [2021-03-10 21:29:55,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-03-10 21:29:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-03-10 21:29:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-03-10 21:29:55,023 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-03-10 21:29:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:55,023 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-03-10 21:29:55,023 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 21:29:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-03-10 21:29:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:55,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:55,024 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:55,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1105 [2021-03-10 21:29:55,224 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:55,224 INFO L82 PathProgramCache]: Analyzing trace with hash -615736580, now seen corresponding path program 102 times [2021-03-10 21:29:55,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:55,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610995817] [2021-03-10 21:29:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:55,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610995817] [2021-03-10 21:29:55,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048008004] [2021-03-10 21:29:55,262 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 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 21:29:55,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:55,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:55,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:55,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:55,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189295392] [2021-03-10 21:29:55,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:55,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:55,312 INFO L87 Difference]: Start difference. First operand 347 states and 1069 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 21:29:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:55,372 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-03-10 21:29:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:55,373 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 21:29:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:55,374 INFO L225 Difference]: With dead ends: 413 [2021-03-10 21:29:55,374 INFO L226 Difference]: Without dead ends: 403 [2021-03-10 21:29:55,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-03-10 21:29:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-03-10 21:29:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 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 21:29:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-03-10 21:29:55,379 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-03-10 21:29:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:55,379 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-03-10 21:29:55,379 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 21:29:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-03-10 21:29:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:55,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:55,380 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:55,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:55,595 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash -742842411, now seen corresponding path program 103 times [2021-03-10 21:29:55,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:55,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976559549] [2021-03-10 21:29:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:55,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976559549] [2021-03-10 21:29:55,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005369260] [2021-03-10 21:29:55,643 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:29:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:55,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:55,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:55,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183471700] [2021-03-10 21:29:55,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:55,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:55,704 INFO L87 Difference]: Start difference. First operand 347 states and 1068 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 21:29:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:55,839 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-03-10 21:29:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:55,840 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 21:29:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:55,840 INFO L225 Difference]: With dead ends: 418 [2021-03-10 21:29:55,840 INFO L226 Difference]: Without dead ends: 418 [2021-03-10 21:29:55,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-03-10 21:29:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-03-10 21:29:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 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 21:29:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-03-10 21:29:55,845 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-03-10 21:29:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:55,846 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-03-10 21:29:55,846 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 21:29:55,846 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-03-10 21:29:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:55,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:55,846 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:56,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1107 [2021-03-10 21:29:56,066 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:56,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1948460984, now seen corresponding path program 104 times [2021-03-10 21:29:56,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:56,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276164991] [2021-03-10 21:29:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276164991] [2021-03-10 21:29:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372479088] [2021-03-10 21:29:56,118 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 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 21:29:56,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:56,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:56,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:56,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:56,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:56,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:56,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129349860] [2021-03-10 21:29:56,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:56,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:56,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:56,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:56,179 INFO L87 Difference]: Start difference. First operand 347 states and 1068 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 21:29:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:56,230 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-03-10 21:29:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:56,230 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 21:29:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:56,231 INFO L225 Difference]: With dead ends: 411 [2021-03-10 21:29:56,231 INFO L226 Difference]: Without dead ends: 399 [2021-03-10 21:29:56,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:29:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-03-10 21:29:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-03-10 21:29:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 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 21:29:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-03-10 21:29:56,236 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-03-10 21:29:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:56,236 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-03-10 21:29:56,236 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 21:29:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-03-10 21:29:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:29:56,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:56,237 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:56,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1108,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:56,459 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2010299589, now seen corresponding path program 105 times [2021-03-10 21:29:56,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:56,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401804119] [2021-03-10 21:29:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:56,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401804119] [2021-03-10 21:29:56,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076966099] [2021-03-10 21:29:56,509 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 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 21:29:56,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:29:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:29:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:56,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:56,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:29:56,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616137391] [2021-03-10 21:29:56,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:29:56,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:56,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:29:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:29:56,575 INFO L87 Difference]: Start difference. First operand 345 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 21:29:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:56,724 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-03-10 21:29:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:56,725 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 17 [2021-03-10 21:29:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:56,725 INFO L225 Difference]: With dead ends: 476 [2021-03-10 21:29:56,726 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 21:29:56,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 21:29:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-03-10 21:29:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 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 21:29:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-03-10 21:29:56,730 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-03-10 21:29:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:56,730 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-03-10 21:29:56,730 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 21:29:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-03-10 21:29:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:56,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:56,731 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:56,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:56,931 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1640906887, now seen corresponding path program 106 times [2021-03-10 21:29:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049069989] [2021-03-10 21:29:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049069989] [2021-03-10 21:29:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138467330] [2021-03-10 21:29:57,054 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:57,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:57,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:29:57,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:57,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:57,429 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 21:29:57,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:57,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:57,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:57,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:29:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:57,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:57,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:29:57,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923762343] [2021-03-10 21:29:57,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:29:57,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:29:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:57,693 INFO L87 Difference]: Start difference. First operand 355 states and 1091 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 21:29:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:57,991 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-03-10 21:29:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:57,991 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 18 [2021-03-10 21:29:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:57,992 INFO L225 Difference]: With dead ends: 425 [2021-03-10 21:29:57,992 INFO L226 Difference]: Without dead ends: 398 [2021-03-10 21:29:57,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-03-10 21:29:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-03-10 21:29:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-03-10 21:29:57,998 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-03-10 21:29:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:57,998 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-03-10 21:29:57,998 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 21:29:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-03-10 21:29:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:57,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:57,999 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:58,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-03-10 21:29:58,213 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1149194617, now seen corresponding path program 107 times [2021-03-10 21:29:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:58,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166717417] [2021-03-10 21:29:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:58,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166717417] [2021-03-10 21:29:58,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602165051] [2021-03-10 21:29:58,318 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:58,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:29:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:29:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:58,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:58,643 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 21:29:58,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:29:58,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:58,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:29:58,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:3 [2021-03-10 21:29:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:58,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:58,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:29:58,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686065434] [2021-03-10 21:29:58,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:29:58,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:58,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:29:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:58,857 INFO L87 Difference]: Start difference. First operand 369 states and 1133 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 21:29:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:59,144 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-03-10 21:29:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:59,144 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 18 [2021-03-10 21:29:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:59,145 INFO L225 Difference]: With dead ends: 444 [2021-03-10 21:29:59,145 INFO L226 Difference]: Without dead ends: 428 [2021-03-10 21:29:59,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:29:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-10 21:29:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-03-10 21:29:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-03-10 21:29:59,150 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-03-10 21:29:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:59,150 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-03-10 21:29:59,150 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 21:29:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-03-10 21:29:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:29:59,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:59,150 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:59,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1229 [2021-03-10 21:29:59,351 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:59,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:59,351 INFO L82 PathProgramCache]: Analyzing trace with hash -405611257, now seen corresponding path program 108 times [2021-03-10 21:29:59,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:59,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359497525] [2021-03-10 21:29:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359497525] [2021-03-10 21:29:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638182847] [2021-03-10 21:29:59,442 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:59,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:29:59,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:59,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:29:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:59,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:29:59,769 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 21:29:59,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:00,105 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:00,106 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:00,106 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 21:30:00,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:00,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:00,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:00,225 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:00,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:00,226 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:00,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:00,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:00,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836298869] [2021-03-10 21:30:00,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:00,259 INFO L87 Difference]: Start difference. First operand 384 states and 1185 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 21:30:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:00,570 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-03-10 21:30:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:00,571 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 18 [2021-03-10 21:30:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:00,571 INFO L225 Difference]: With dead ends: 463 [2021-03-10 21:30:00,571 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 21:30:00,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 21:30:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-03-10 21:30:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-03-10 21:30:00,576 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-03-10 21:30:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:00,576 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-03-10 21:30:00,576 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 21:30:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-03-10 21:30:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:00,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:00,577 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:00,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-03-10 21:30:00,777 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:00,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1622768455, now seen corresponding path program 109 times [2021-03-10 21:30:00,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:00,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823091491] [2021-03-10 21:30:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:00,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823091491] [2021-03-10 21:30:00,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007722654] [2021-03-10 21:30:00,861 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:00,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:01,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:01,145 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 21:30:01,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:01,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:01,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:01,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:01,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:01,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:01,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633847752] [2021-03-10 21:30:01,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:01,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:01,270 INFO L87 Difference]: Start difference. First operand 384 states and 1185 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 21:30:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:01,587 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-03-10 21:30:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:01,588 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 18 [2021-03-10 21:30:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:01,588 INFO L225 Difference]: With dead ends: 479 [2021-03-10 21:30:01,588 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 21:30:01,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 21:30:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-03-10 21:30:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-03-10 21:30:01,594 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-03-10 21:30:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:01,594 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-03-10 21:30:01,595 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 21:30:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-03-10 21:30:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:01,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:01,595 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:01,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-03-10 21:30:01,803 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:01,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1928615481, now seen corresponding path program 110 times [2021-03-10 21:30:01,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:01,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33183557] [2021-03-10 21:30:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:01,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33183557] [2021-03-10 21:30:01,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621540481] [2021-03-10 21:30:01,915 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 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 21:30:01,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:01,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:01,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:01,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:02,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:02,209 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 21:30:02,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:02,497 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:02,498 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:02,498 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 21:30:02,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:02,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:02,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:02,715 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:02,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:02,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:02,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:02,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:02,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478012709] [2021-03-10 21:30:02,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:02,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:02,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:02,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:02,749 INFO L87 Difference]: Start difference. First operand 423 states and 1328 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 21:30:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:03,204 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-03-10 21:30:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:30:03,204 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 18 [2021-03-10 21:30:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:03,205 INFO L225 Difference]: With dead ends: 513 [2021-03-10 21:30:03,205 INFO L226 Difference]: Without dead ends: 494 [2021-03-10 21:30:03,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:30:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-03-10 21:30:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-03-10 21:30:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-03-10 21:30:03,212 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-03-10 21:30:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:03,212 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-03-10 21:30:03,212 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 21:30:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-03-10 21:30:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:03,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:03,214 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:03,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1509 [2021-03-10 21:30:03,434 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1077471349, now seen corresponding path program 111 times [2021-03-10 21:30:03,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:03,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538162032] [2021-03-10 21:30:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:03,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538162032] [2021-03-10 21:30:03,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297194774] [2021-03-10 21:30:03,538 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 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 21:30:03,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:03,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:03,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:03,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:03,829 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 21:30:03,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:04,106 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:04,107 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:04,107 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 21:30:04,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:04,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:04,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:04,284 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:04,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:04,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:04,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:04,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:04,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787774536] [2021-03-10 21:30:04,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:04,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:04,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:04,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:04,313 INFO L87 Difference]: Start difference. First operand 422 states and 1316 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 21:30:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:04,667 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-03-10 21:30:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:04,668 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 18 [2021-03-10 21:30:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:04,669 INFO L225 Difference]: With dead ends: 479 [2021-03-10 21:30:04,669 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 21:30:04,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:30:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 21:30:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-03-10 21:30:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-03-10 21:30:04,673 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-03-10 21:30:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:04,674 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-03-10 21:30:04,674 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 21:30:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-03-10 21:30:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:04,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:04,674 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:04,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1658,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:04,875 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:04,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1654277767, now seen corresponding path program 112 times [2021-03-10 21:30:04,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:04,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999897610] [2021-03-10 21:30:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:04,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999897610] [2021-03-10 21:30:04,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968520219] [2021-03-10 21:30:04,979 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:30:05,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:05,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:05,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:05,267 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 21:30:05,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:05,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:05,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:05,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:05,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:05,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:05,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62185496] [2021-03-10 21:30:05,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:05,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:05,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:05,395 INFO L87 Difference]: Start difference. First operand 424 states and 1322 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 21:30:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:05,746 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-03-10 21:30:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:05,746 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 18 [2021-03-10 21:30:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:05,747 INFO L225 Difference]: With dead ends: 515 [2021-03-10 21:30:05,747 INFO L226 Difference]: Without dead ends: 499 [2021-03-10 21:30:05,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-10 21:30:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-03-10 21:30:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-03-10 21:30:05,752 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-03-10 21:30:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:05,752 INFO L480 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-03-10 21:30:05,752 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 21:30:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-03-10 21:30:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:05,753 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:05,753 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:05,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1794,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:05,955 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:05,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1897106169, now seen corresponding path program 113 times [2021-03-10 21:30:05,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:05,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490883134] [2021-03-10 21:30:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:06,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490883134] [2021-03-10 21:30:06,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56713436] [2021-03-10 21:30:06,071 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 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 21:30:06,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:06,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:06,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:06,333 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 21:30:06,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:06,639 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:06,639 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:06,640 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 21:30:06,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:06,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:06,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:06,760 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:06,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:06,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:06,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:06,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435134235] [2021-03-10 21:30:06,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:06,791 INFO L87 Difference]: Start difference. First operand 458 states and 1441 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 21:30:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:07,343 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-03-10 21:30:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:07,343 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 18 [2021-03-10 21:30:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:07,345 INFO L225 Difference]: With dead ends: 583 [2021-03-10 21:30:07,345 INFO L226 Difference]: Without dead ends: 557 [2021-03-10 21:30:07,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:30:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-03-10 21:30:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-03-10 21:30:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-03-10 21:30:07,353 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-03-10 21:30:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:07,353 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-03-10 21:30:07,353 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 21:30:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-03-10 21:30:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:07,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:07,354 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:07,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-03-10 21:30:07,570 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:07,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:07,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1045962037, now seen corresponding path program 114 times [2021-03-10 21:30:07,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:07,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926268765] [2021-03-10 21:30:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:07,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926268765] [2021-03-10 21:30:07,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816184296] [2021-03-10 21:30:07,652 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 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 21:30:07,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:30:07,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:07,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:07,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:07,919 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 21:30:07,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:08,151 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:08,151 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:08,151 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 21:30:08,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:08,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:08,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:08,256 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:08,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:08,257 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:08,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:08,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:08,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374865400] [2021-03-10 21:30:08,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:08,287 INFO L87 Difference]: Start difference. First operand 462 states and 1452 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 21:30:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:08,723 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-03-10 21:30:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:08,723 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 18 [2021-03-10 21:30:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:08,724 INFO L225 Difference]: With dead ends: 516 [2021-03-10 21:30:08,724 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 21:30:08,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:30:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 21:30:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-03-10 21:30:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-03-10 21:30:08,730 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-03-10 21:30:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:08,730 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-03-10 21:30:08,730 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 21:30:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-03-10 21:30:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:08,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:08,730 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:08,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2014,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:08,931 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash -430297721, now seen corresponding path program 115 times [2021-03-10 21:30:08,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:08,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295642428] [2021-03-10 21:30:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:09,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295642428] [2021-03-10 21:30:09,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130346176] [2021-03-10 21:30:09,015 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 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 21:30:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:09,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:09,298 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 21:30:09,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:09,558 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:09,558 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:09,559 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 21:30:09,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:09,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:09,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:09,654 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:09,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:09,655 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:09,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:09,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688467687] [2021-03-10 21:30:09,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:09,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:09,685 INFO L87 Difference]: Start difference. First operand 464 states and 1458 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 21:30:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:10,162 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-03-10 21:30:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:10,163 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 18 [2021-03-10 21:30:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:10,164 INFO L225 Difference]: With dead ends: 532 [2021-03-10 21:30:10,164 INFO L226 Difference]: Without dead ends: 522 [2021-03-10 21:30:10,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:30:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-03-10 21:30:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-03-10 21:30:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-03-10 21:30:10,169 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-03-10 21:30:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:10,169 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-03-10 21:30:10,169 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 21:30:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-03-10 21:30:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:10,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:10,170 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:10,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2109 [2021-03-10 21:30:10,372 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:10,372 INFO L82 PathProgramCache]: Analyzing trace with hash -486883791, now seen corresponding path program 116 times [2021-03-10 21:30:10,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:10,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805569637] [2021-03-10 21:30:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:30:10,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805569637] [2021-03-10 21:30:10,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176299282] [2021-03-10 21:30:10,437 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:10,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:10,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:10,693 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 21:30:10,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:10,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:10,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:10,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:10,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:10,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-03-10 21:30:10,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578727503] [2021-03-10 21:30:10,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:30:10,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:30:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:30:10,857 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:11,033 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-03-10 21:30:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:30:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 21:30:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:11,034 INFO L225 Difference]: With dead ends: 485 [2021-03-10 21:30:11,034 INFO L226 Difference]: Without dead ends: 467 [2021-03-10 21:30:11,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-03-10 21:30:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-03-10 21:30:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 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 21:30:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-03-10 21:30:11,041 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-03-10 21:30:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:11,041 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-03-10 21:30:11,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-03-10 21:30:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:11,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:11,042 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:11,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-03-10 21:30:11,247 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash -100682677, now seen corresponding path program 117 times [2021-03-10 21:30:11,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:11,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749040682] [2021-03-10 21:30:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:11,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749040682] [2021-03-10 21:30:11,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594188169] [2021-03-10 21:30:11,317 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 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 21:30:11,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:11,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:11,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:11,596 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 21:30:11,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:11,824 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:11,825 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:11,825 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 21:30:12,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:12,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:12,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:12,100 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:12,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:12,101 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:12,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:12,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:30:12,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979893106] [2021-03-10 21:30:12,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:30:12,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:30:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:30:12,132 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:12,524 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-03-10 21:30:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 21:30:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:12,526 INFO L225 Difference]: With dead ends: 544 [2021-03-10 21:30:12,526 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 21:30:12,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:30:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 21:30:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-03-10 21:30:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 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 21:30:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-03-10 21:30:12,534 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-03-10 21:30:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:12,534 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-03-10 21:30:12,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-03-10 21:30:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:12,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:12,535 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:12,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2309 [2021-03-10 21:30:12,756 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 437172901, now seen corresponding path program 118 times [2021-03-10 21:30:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:12,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071768986] [2021-03-10 21:30:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:12,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071768986] [2021-03-10 21:30:12,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142346751] [2021-03-10 21:30:12,855 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:12,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:12,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:12,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:12,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:13,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:13,158 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 21:30:13,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:13,461 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:13,461 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:13,462 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 21:30:13,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:13,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:13,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:13,580 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:13,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:13,581 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:13,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:13,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:13,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771458269] [2021-03-10 21:30:13,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:13,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:13,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:13,619 INFO L87 Difference]: Start difference. First operand 464 states and 1457 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 21:30:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:14,277 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-03-10 21:30:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:14,278 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 18 [2021-03-10 21:30:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:14,279 INFO L225 Difference]: With dead ends: 595 [2021-03-10 21:30:14,279 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 21:30:14,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:30:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 21:30:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-03-10 21:30:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-03-10 21:30:14,285 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-03-10 21:30:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-03-10 21:30:14,285 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 21:30:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-03-10 21:30:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:14,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:14,285 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:14,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2472,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:14,486 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1052837217, now seen corresponding path program 119 times [2021-03-10 21:30:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:14,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530510844] [2021-03-10 21:30:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:14,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530510844] [2021-03-10 21:30:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165341095] [2021-03-10 21:30:14,570 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 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 21:30:14,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:14,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:14,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:14,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:14,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:14,859 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 21:30:14,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:15,088 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:15,089 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:15,089 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 21:30:15,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:15,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:15,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:15,204 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:15,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:15,205 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:15,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:15,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:15,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195985427] [2021-03-10 21:30:15,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:15,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:15,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:15,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:15,232 INFO L87 Difference]: Start difference. First operand 455 states and 1422 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 21:30:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:15,616 INFO L93 Difference]: Finished difference Result 523 states and 1566 transitions. [2021-03-10 21:30:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:15,617 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 18 [2021-03-10 21:30:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:15,617 INFO L225 Difference]: With dead ends: 523 [2021-03-10 21:30:15,617 INFO L226 Difference]: Without dead ends: 513 [2021-03-10 21:30:15,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:30:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-10 21:30:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 456. [2021-03-10 21:30:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-03-10 21:30:15,624 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-03-10 21:30:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:15,624 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-03-10 21:30:15,624 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 21:30:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-03-10 21:30:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:15,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:15,625 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:15,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2574 [2021-03-10 21:30:15,839 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1663900857, now seen corresponding path program 120 times [2021-03-10 21:30:15,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:15,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356685399] [2021-03-10 21:30:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:15,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356685399] [2021-03-10 21:30:15,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963673584] [2021-03-10 21:30:15,923 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 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 21:30:15,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:30:15,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:15,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:16,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:16,226 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 21:30:16,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:16,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:16,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:16,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:16,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:16,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:16,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48716872] [2021-03-10 21:30:16,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:16,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:16,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:16,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:16,309 INFO L87 Difference]: Start difference. First operand 456 states and 1425 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 21:30:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:16,681 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-03-10 21:30:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:16,681 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 18 [2021-03-10 21:30:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:16,682 INFO L225 Difference]: With dead ends: 558 [2021-03-10 21:30:16,682 INFO L226 Difference]: Without dead ends: 540 [2021-03-10 21:30:16,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-03-10 21:30:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-03-10 21:30:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-03-10 21:30:16,689 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-03-10 21:30:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:16,689 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-03-10 21:30:16,689 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 21:30:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-03-10 21:30:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:16,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:16,689 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:16,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2682,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:16,890 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash -920317497, now seen corresponding path program 121 times [2021-03-10 21:30:16,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:16,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177500798] [2021-03-10 21:30:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:16,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177500798] [2021-03-10 21:30:16,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577808736] [2021-03-10 21:30:16,973 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 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 21:30:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:17,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:17,234 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 21:30:17,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:17,488 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:17,489 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:17,489 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 21:30:17,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:17,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:17,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:17,600 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:17,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:17,601 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:17,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:17,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:17,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55717895] [2021-03-10 21:30:17,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:17,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:17,631 INFO L87 Difference]: Start difference. First operand 500 states and 1576 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 21:30:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:18,329 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-03-10 21:30:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:30:18,330 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 18 [2021-03-10 21:30:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:18,330 INFO L225 Difference]: With dead ends: 647 [2021-03-10 21:30:18,330 INFO L226 Difference]: Without dead ends: 621 [2021-03-10 21:30:18,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:30:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-03-10 21:30:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-03-10 21:30:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-03-10 21:30:18,348 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-03-10 21:30:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:18,348 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-03-10 21:30:18,349 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 21:30:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-03-10 21:30:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:18,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:18,349 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:18,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2727,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:18,571 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:18,572 INFO L82 PathProgramCache]: Analyzing trace with hash -69173365, now seen corresponding path program 122 times [2021-03-10 21:30:18,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:18,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670130294] [2021-03-10 21:30:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:18,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670130294] [2021-03-10 21:30:18,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185803358] [2021-03-10 21:30:18,668 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 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 21:30:18,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:18,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:18,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:18,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:18,937 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 21:30:19,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:19,159 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:19,159 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:19,159 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 21:30:19,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:19,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:19,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:19,294 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:19,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:19,295 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:19,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:19,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:19,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968360425] [2021-03-10 21:30:19,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:19,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:19,323 INFO L87 Difference]: Start difference. First operand 506 states and 1597 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 21:30:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:20,128 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-03-10 21:30:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:30:20,128 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 18 [2021-03-10 21:30:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:20,129 INFO L225 Difference]: With dead ends: 727 [2021-03-10 21:30:20,129 INFO L226 Difference]: Without dead ends: 685 [2021-03-10 21:30:20,129 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:30:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-03-10 21:30:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-03-10 21:30:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-03-10 21:30:20,135 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-03-10 21:30:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:20,135 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-03-10 21:30:20,135 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 21:30:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-03-10 21:30:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:20,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:20,136 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:20,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:20,337 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash 546490951, now seen corresponding path program 123 times [2021-03-10 21:30:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:20,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613108792] [2021-03-10 21:30:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:20,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613108792] [2021-03-10 21:30:20,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53686219] [2021-03-10 21:30:20,451 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 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 21:30:20,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:30:20,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:20,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:20,794 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 21:30:20,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:21,041 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:21,042 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:21,042 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 21:30:21,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:21,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:21,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:21,119 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:21,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:21,120 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:21,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:21,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:21,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824981943] [2021-03-10 21:30:21,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:21,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:21,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:21,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:21,149 INFO L87 Difference]: Start difference. First operand 507 states and 1591 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 21:30:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:21,624 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-03-10 21:30:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:30:21,624 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 18 [2021-03-10 21:30:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:21,625 INFO L225 Difference]: With dead ends: 598 [2021-03-10 21:30:21,625 INFO L226 Difference]: Without dead ends: 588 [2021-03-10 21:30:21,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:30:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-03-10 21:30:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-03-10 21:30:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-03-10 21:30:21,631 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-03-10 21:30:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:21,631 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-03-10 21:30:21,631 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 21:30:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-03-10 21:30:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:21,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:21,631 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:21,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:21,832 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:21,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1842751733, now seen corresponding path program 124 times [2021-03-10 21:30:21,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:21,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473336035] [2021-03-10 21:30:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:21,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473336035] [2021-03-10 21:30:21,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167918021] [2021-03-10 21:30:21,929 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 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 21:30:21,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:21,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:21,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:21,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:22,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:22,219 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 21:30:22,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:22,532 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:22,533 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:22,533 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 21:30:22,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:22,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:22,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:22,653 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:22,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:22,654 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:22,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:22,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:22,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290614893] [2021-03-10 21:30:22,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:22,683 INFO L87 Difference]: Start difference. First operand 507 states and 1591 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 21:30:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:23,162 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-03-10 21:30:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:30:23,162 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 18 [2021-03-10 21:30:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:23,163 INFO L225 Difference]: With dead ends: 608 [2021-03-10 21:30:23,163 INFO L226 Difference]: Without dead ends: 598 [2021-03-10 21:30:23,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 506.7ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:30:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-03-10 21:30:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-03-10 21:30:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-03-10 21:30:23,169 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-03-10 21:30:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:23,169 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-03-10 21:30:23,169 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 21:30:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-03-10 21:30:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:23,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:23,170 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:23,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3033 [2021-03-10 21:30:23,370 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1754340969, now seen corresponding path program 125 times [2021-03-10 21:30:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:23,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000198173] [2021-03-10 21:30:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:23,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000198173] [2021-03-10 21:30:23,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287105601] [2021-03-10 21:30:23,451 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 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 21:30:23,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:30:23,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:23,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:23,729 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 21:30:23,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:23,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:23,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:23,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:23,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:23,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:30:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302657326] [2021-03-10 21:30:23,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:30:23,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:30:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:30:23,902 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:24,180 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-03-10 21:30:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:30:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 21:30:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:24,181 INFO L225 Difference]: With dead ends: 537 [2021-03-10 21:30:24,181 INFO L226 Difference]: Without dead ends: 519 [2021-03-10 21:30:24,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-10 21:30:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-03-10 21:30:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-03-10 21:30:24,186 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-03-10 21:30:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:24,186 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-03-10 21:30:24,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-03-10 21:30:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:24,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:24,187 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:24,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3183 [2021-03-10 21:30:24,399 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash -214619961, now seen corresponding path program 126 times [2021-03-10 21:30:24,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:24,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917161316] [2021-03-10 21:30:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:24,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917161316] [2021-03-10 21:30:24,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42834234] [2021-03-10 21:30:24,479 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 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 21:30:24,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:30:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:24,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:24,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:24,747 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 21:30:24,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:25,009 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:25,009 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:25,010 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 33 treesize of output 169 [2021-03-10 21:30:25,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:25,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:25,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:25,192 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:25,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:25,192 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:25,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:25,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:25,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085493183] [2021-03-10 21:30:25,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:25,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:25,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:25,219 INFO L87 Difference]: Start difference. First operand 507 states and 1590 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 21:30:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:25,749 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-03-10 21:30:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:25,750 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 18 [2021-03-10 21:30:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:25,751 INFO L225 Difference]: With dead ends: 618 [2021-03-10 21:30:25,751 INFO L226 Difference]: Without dead ends: 608 [2021-03-10 21:30:25,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 474.4ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:30:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-03-10 21:30:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-03-10 21:30:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-03-10 21:30:25,758 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-03-10 21:30:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:25,758 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-03-10 21:30:25,758 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 21:30:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-03-10 21:30:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:25,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:25,759 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:25,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:25,979 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:25,979 INFO L82 PathProgramCache]: Analyzing trace with hash -720966227, now seen corresponding path program 127 times [2021-03-10 21:30:25,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:25,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334847483] [2021-03-10 21:30:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:26,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334847483] [2021-03-10 21:30:26,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228907401] [2021-03-10 21:30:26,073 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 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 21:30:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:26,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:26,370 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 21:30:26,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:26,597 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:26,598 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:26,598 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 21:30:26,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:26,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:26,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:26,748 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:26,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:26,749 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:26,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:26,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:26,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343493724] [2021-03-10 21:30:26,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:26,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:26,778 INFO L87 Difference]: Start difference. First operand 507 states and 1590 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 21:30:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:27,502 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-03-10 21:30:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:30:27,502 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 18 [2021-03-10 21:30:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:27,503 INFO L225 Difference]: With dead ends: 681 [2021-03-10 21:30:27,503 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 21:30:27,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 590.4ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:30:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 21:30:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-03-10 21:30:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-03-10 21:30:27,509 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-03-10 21:30:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:27,509 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-03-10 21:30:27,509 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 21:30:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-03-10 21:30:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:27,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:27,509 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:27,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-03-10 21:30:27,710 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:27,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1184758385, now seen corresponding path program 128 times [2021-03-10 21:30:27,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:27,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975337300] [2021-03-10 21:30:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:27,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975337300] [2021-03-10 21:30:27,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379222867] [2021-03-10 21:30:27,802 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 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 21:30:27,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:27,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:27,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:28,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:28,083 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 21:30:28,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:28,408 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:28,408 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:28,408 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 21:30:28,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:28,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:28,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:28,509 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:28,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:28,509 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:28,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:28,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:28,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934811949] [2021-03-10 21:30:28,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:28,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:28,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:28,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:28,538 INFO L87 Difference]: Start difference. First operand 497 states and 1554 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 21:30:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:29,043 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-03-10 21:30:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:30:29,044 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 18 [2021-03-10 21:30:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:29,045 INFO L225 Difference]: With dead ends: 595 [2021-03-10 21:30:29,045 INFO L226 Difference]: Without dead ends: 585 [2021-03-10 21:30:29,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:30:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-10 21:30:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-03-10 21:30:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-03-10 21:30:29,050 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-03-10 21:30:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:29,050 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-03-10 21:30:29,050 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 21:30:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-03-10 21:30:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:29,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:29,051 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:29,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:29,251 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1448223097, now seen corresponding path program 129 times [2021-03-10 21:30:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:29,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153130244] [2021-03-10 21:30:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:29,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153130244] [2021-03-10 21:30:29,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321300782] [2021-03-10 21:30:29,336 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 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 21:30:29,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:29,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:29,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:29,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:29,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:29,619 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 21:30:29,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:29,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:29,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:29,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:29,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:29,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:29,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107348229] [2021-03-10 21:30:29,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:29,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:29,709 INFO L87 Difference]: Start difference. First operand 498 states and 1557 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 21:30:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:30,022 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-03-10 21:30:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:30,023 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 18 [2021-03-10 21:30:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:30,023 INFO L225 Difference]: With dead ends: 613 [2021-03-10 21:30:30,023 INFO L226 Difference]: Without dead ends: 597 [2021-03-10 21:30:30,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-03-10 21:30:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-03-10 21:30:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-03-10 21:30:30,030 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-03-10 21:30:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:30,030 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-03-10 21:30:30,030 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 21:30:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-03-10 21:30:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:30,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:30,030 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:30,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3685,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:30,231 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:30,231 INFO L82 PathProgramCache]: Analyzing trace with hash -704639737, now seen corresponding path program 130 times [2021-03-10 21:30:30,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:30,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82690882] [2021-03-10 21:30:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:30,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82690882] [2021-03-10 21:30:30,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931884201] [2021-03-10 21:30:30,318 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 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 21:30:30,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:30,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:30,591 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 21:30:30,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:30,855 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:30,855 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:30,855 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 21:30:30,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:30,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:30,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:30,964 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:30,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:30,965 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:30,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:30,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:30,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69978674] [2021-03-10 21:30:30,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:30,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:30,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:30,996 INFO L87 Difference]: Start difference. First operand 570 states and 1795 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 21:30:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:31,826 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-03-10 21:30:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:30:31,826 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 18 [2021-03-10 21:30:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:31,827 INFO L225 Difference]: With dead ends: 700 [2021-03-10 21:30:31,827 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 21:30:31,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 594.1ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:30:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 21:30:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-03-10 21:30:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-03-10 21:30:31,833 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-03-10 21:30:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:31,833 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-03-10 21:30:31,833 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 21:30:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-03-10 21:30:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:31,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:31,834 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:32,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-03-10 21:30:32,035 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash 146504395, now seen corresponding path program 131 times [2021-03-10 21:30:32,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:32,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079943782] [2021-03-10 21:30:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:32,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079943782] [2021-03-10 21:30:32,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189373377] [2021-03-10 21:30:32,126 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 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 21:30:32,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:30:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:32,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:32,400 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 21:30:32,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:32,663 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:32,664 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:32,664 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 21:30:32,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:32,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:32,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:32,822 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:32,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:32,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:32,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:32,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:32,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8303359] [2021-03-10 21:30:32,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:32,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:32,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:32,860 INFO L87 Difference]: Start difference. First operand 573 states and 1806 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 21:30:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:33,508 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-03-10 21:30:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:33,509 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 18 [2021-03-10 21:30:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:33,509 INFO L225 Difference]: With dead ends: 692 [2021-03-10 21:30:33,510 INFO L226 Difference]: Without dead ends: 682 [2021-03-10 21:30:33,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:30:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-03-10 21:30:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-03-10 21:30:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-03-10 21:30:33,526 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-03-10 21:30:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:33,527 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-03-10 21:30:33,527 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 21:30:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-03-10 21:30:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:33,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:33,528 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:33,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3840,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:33,743 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:33,743 INFO L82 PathProgramCache]: Analyzing trace with hash 762168711, now seen corresponding path program 132 times [2021-03-10 21:30:33,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:33,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132172195] [2021-03-10 21:30:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:33,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132172195] [2021-03-10 21:30:33,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533238677] [2021-03-10 21:30:33,840 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 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 21:30:33,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:30:33,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:34,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:34,143 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 21:30:34,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:34,404 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:34,404 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:34,404 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 21:30:34,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:34,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:34,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:34,523 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:34,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:34,524 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:34,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:34,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040087916] [2021-03-10 21:30:34,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:34,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:34,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:34,553 INFO L87 Difference]: Start difference. First operand 591 states and 1866 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 21:30:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:35,267 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-03-10 21:30:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:30:35,267 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 18 [2021-03-10 21:30:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:35,268 INFO L225 Difference]: With dead ends: 752 [2021-03-10 21:30:35,268 INFO L226 Difference]: Without dead ends: 730 [2021-03-10 21:30:35,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 653.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:30:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-03-10 21:30:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-03-10 21:30:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-03-10 21:30:35,275 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-03-10 21:30:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:35,275 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-03-10 21:30:35,275 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 21:30:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-03-10 21:30:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:35,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:35,276 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:35,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:35,476 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1627073973, now seen corresponding path program 133 times [2021-03-10 21:30:35,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:35,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399970981] [2021-03-10 21:30:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:35,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399970981] [2021-03-10 21:30:35,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447577153] [2021-03-10 21:30:35,572 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 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 21:30:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:35,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:35,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:35,864 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 21:30:35,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:36,076 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:36,076 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:36,076 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 21:30:36,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:36,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:36,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:36,296 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:36,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:36,296 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:36,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:36,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:36,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053494814] [2021-03-10 21:30:36,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:36,325 INFO L87 Difference]: Start difference. First operand 593 states and 1868 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 21:30:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:36,883 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-03-10 21:30:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:36,884 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 18 [2021-03-10 21:30:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:36,884 INFO L225 Difference]: With dead ends: 683 [2021-03-10 21:30:36,885 INFO L226 Difference]: Without dead ends: 678 [2021-03-10 21:30:36,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:30:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-03-10 21:30:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-03-10 21:30:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-03-10 21:30:36,891 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-03-10 21:30:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:36,891 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-03-10 21:30:36,891 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 21:30:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-03-10 21:30:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:36,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:36,892 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:37,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-03-10 21:30:37,112 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1615814151, now seen corresponding path program 134 times [2021-03-10 21:30:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174416203] [2021-03-10 21:30:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:37,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174416203] [2021-03-10 21:30:37,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836821653] [2021-03-10 21:30:37,217 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 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 21:30:37,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:37,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:37,518 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 21:30:37,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:37,736 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:37,736 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:37,736 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 21:30:37,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:37,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:37,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:37,970 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:37,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:37,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:37,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:37,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203799852] [2021-03-10 21:30:37,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:37,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:37,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:37,999 INFO L87 Difference]: Start difference. First operand 593 states and 1868 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 21:30:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:38,494 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-03-10 21:30:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:30:38,494 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 18 [2021-03-10 21:30:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:38,495 INFO L225 Difference]: With dead ends: 681 [2021-03-10 21:30:38,495 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 21:30:38,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:30:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 21:30:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-03-10 21:30:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-03-10 21:30:38,502 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-03-10 21:30:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:38,502 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-03-10 21:30:38,502 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 21:30:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-03-10 21:30:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:38,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:38,503 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:38,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:38,703 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1904159473, now seen corresponding path program 135 times [2021-03-10 21:30:38,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:38,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778799181] [2021-03-10 21:30:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:38,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778799181] [2021-03-10 21:30:38,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644042254] [2021-03-10 21:30:38,787 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 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 21:30:38,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:30:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:39,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:39,072 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 21:30:39,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:39,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:39,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:39,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:39,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:39,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239977290] [2021-03-10 21:30:39,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:39,133 INFO L87 Difference]: Start difference. First operand 593 states and 1868 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 21:30:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:39,503 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-03-10 21:30:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:39,503 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 18 [2021-03-10 21:30:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:39,504 INFO L225 Difference]: With dead ends: 630 [2021-03-10 21:30:39,504 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 21:30:39,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:30:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 21:30:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-03-10 21:30:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-03-10 21:30:39,510 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-03-10 21:30:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:39,510 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-03-10 21:30:39,510 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 21:30:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-03-10 21:30:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:39,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:39,511 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:39,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:39,712 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash 548291531, now seen corresponding path program 136 times [2021-03-10 21:30:39,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:39,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413189264] [2021-03-10 21:30:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413189264] [2021-03-10 21:30:39,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770196518] [2021-03-10 21:30:39,804 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 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 21:30:39,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:40,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:40,093 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 21:30:40,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:40,371 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:40,371 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:40,372 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 21:30:40,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:40,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:40,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:40,461 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:40,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:40,462 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:40,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:40,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:40,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709847970] [2021-03-10 21:30:40,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:40,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:40,489 INFO L87 Difference]: Start difference. First operand 593 states and 1866 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 21:30:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:41,148 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-03-10 21:30:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:41,148 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 18 [2021-03-10 21:30:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:41,149 INFO L225 Difference]: With dead ends: 747 [2021-03-10 21:30:41,149 INFO L226 Difference]: Without dead ends: 737 [2021-03-10 21:30:41,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 659.0ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:30:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-03-10 21:30:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-03-10 21:30:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-03-10 21:30:41,155 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-03-10 21:30:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:41,155 INFO L480 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-03-10 21:30:41,155 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 21:30:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-03-10 21:30:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:41,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:41,156 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:41,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:41,359 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2031426469, now seen corresponding path program 137 times [2021-03-10 21:30:41,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:41,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012030882] [2021-03-10 21:30:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012030882] [2021-03-10 21:30:41,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104450986] [2021-03-10 21:30:41,493 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 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 21:30:41,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:30:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:41,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:41,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:41,788 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 21:30:41,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:42,075 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:42,075 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:42,075 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 21:30:42,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:42,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:42,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:42,309 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:42,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:42,310 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:42,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:42,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:42,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667381077] [2021-03-10 21:30:42,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:42,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:42,339 INFO L87 Difference]: Start difference. First operand 599 states and 1886 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 21:30:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:43,105 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-03-10 21:30:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:30:43,105 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 18 [2021-03-10 21:30:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:43,106 INFO L225 Difference]: With dead ends: 777 [2021-03-10 21:30:43,106 INFO L226 Difference]: Without dead ends: 748 [2021-03-10 21:30:43,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 781.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:30:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-03-10 21:30:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-03-10 21:30:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-03-10 21:30:43,113 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-03-10 21:30:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:43,113 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-03-10 21:30:43,113 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 21:30:43,113 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-03-10 21:30:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:43,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:43,114 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:43,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4523,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:43,314 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:43,315 INFO L82 PathProgramCache]: Analyzing trace with hash 979347297, now seen corresponding path program 138 times [2021-03-10 21:30:43,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:43,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78712783] [2021-03-10 21:30:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78712783] [2021-03-10 21:30:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286004439] [2021-03-10 21:30:43,413 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 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 21:30:43,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:30:43,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:43,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:43,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:43,715 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 21:30:43,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:43,942 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:43,942 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:43,942 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 21:30:44,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:44,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:44,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:44,074 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:44,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:44,075 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:44,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:44,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:44,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832290084] [2021-03-10 21:30:44,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:44,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:44,104 INFO L87 Difference]: Start difference. First operand 597 states and 1877 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 21:30:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:44,722 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-03-10 21:30:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:30:44,722 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 18 [2021-03-10 21:30:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:44,723 INFO L225 Difference]: With dead ends: 676 [2021-03-10 21:30:44,723 INFO L226 Difference]: Without dead ends: 671 [2021-03-10 21:30:44,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 623.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:30:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-03-10 21:30:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-03-10 21:30:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-03-10 21:30:44,729 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-03-10 21:30:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:44,729 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-03-10 21:30:44,729 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 21:30:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-03-10 21:30:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:44,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:44,730 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:44,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4690 [2021-03-10 21:30:44,931 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:44,931 INFO L82 PathProgramCache]: Analyzing trace with hash 942820167, now seen corresponding path program 139 times [2021-03-10 21:30:44,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:44,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000282145] [2021-03-10 21:30:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000282145] [2021-03-10 21:30:45,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988045098] [2021-03-10 21:30:45,017 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 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 21:30:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:45,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:45,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:45,297 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 21:30:45,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:45,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:45,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:45,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:45,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:45,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463835139] [2021-03-10 21:30:45,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:45,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:45,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:45,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:45,395 INFO L87 Difference]: Start difference. First operand 597 states and 1877 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 21:30:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:45,716 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-03-10 21:30:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:45,716 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 18 [2021-03-10 21:30:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:45,717 INFO L225 Difference]: With dead ends: 707 [2021-03-10 21:30:45,717 INFO L226 Difference]: Without dead ends: 691 [2021-03-10 21:30:45,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-03-10 21:30:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-03-10 21:30:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-03-10 21:30:45,723 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-03-10 21:30:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:45,724 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-03-10 21:30:45,724 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 21:30:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-03-10 21:30:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:45,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:45,724 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:45,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4805,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:45,925 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1686403527, now seen corresponding path program 140 times [2021-03-10 21:30:45,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:45,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384155036] [2021-03-10 21:30:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384155036] [2021-03-10 21:30:46,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831474030] [2021-03-10 21:30:46,014 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 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 21:30:46,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:46,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:46,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:46,289 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 21:30:46,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:46,534 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:46,534 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:46,534 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 21:30:46,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:46,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:46,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:46,672 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:46,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:46,673 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:46,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:46,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072311503] [2021-03-10 21:30:46,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:46,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:46,703 INFO L87 Difference]: Start difference. First operand 667 states and 2108 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 21:30:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:47,534 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-03-10 21:30:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:30:47,534 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 18 [2021-03-10 21:30:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:47,535 INFO L225 Difference]: With dead ends: 772 [2021-03-10 21:30:47,535 INFO L226 Difference]: Without dead ends: 762 [2021-03-10 21:30:47,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:30:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-03-10 21:30:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-03-10 21:30:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-03-10 21:30:47,542 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-03-10 21:30:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:47,543 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-03-10 21:30:47,543 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 21:30:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-03-10 21:30:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:47,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:47,543 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:47,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:47,744 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:47,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1757419637, now seen corresponding path program 141 times [2021-03-10 21:30:47,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:47,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699816477] [2021-03-10 21:30:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699816477] [2021-03-10 21:30:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974254174] [2021-03-10 21:30:47,848 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 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 21:30:47,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:30:47,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:48,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:48,131 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 21:30:48,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:48,499 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:48,499 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:48,499 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 21:30:48,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:48,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:48,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:48,653 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:48,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:48,654 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:48,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:48,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084044774] [2021-03-10 21:30:48,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:48,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:48,683 INFO L87 Difference]: Start difference. First operand 670 states and 2120 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 21:30:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:49,322 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-03-10 21:30:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:30:49,323 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 18 [2021-03-10 21:30:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:49,324 INFO L225 Difference]: With dead ends: 788 [2021-03-10 21:30:49,324 INFO L226 Difference]: Without dead ends: 778 [2021-03-10 21:30:49,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:30:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-03-10 21:30:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-03-10 21:30:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-03-10 21:30:49,331 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-03-10 21:30:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:49,331 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-03-10 21:30:49,331 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 21:30:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-03-10 21:30:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:49,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:49,332 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:49,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4989 [2021-03-10 21:30:49,533 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1141755321, now seen corresponding path program 142 times [2021-03-10 21:30:49,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:49,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890488952] [2021-03-10 21:30:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:49,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890488952] [2021-03-10 21:30:49,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498774145] [2021-03-10 21:30:49,639 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 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 21:30:49,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:49,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:50,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:50,017 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 21:30:50,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:50,359 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:50,359 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:50,359 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 21:30:50,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:50,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:50,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:50,473 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:50,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:50,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:50,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:50,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:30:50,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910160231] [2021-03-10 21:30:50,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:30:50,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:50,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:30:50,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:50,511 INFO L87 Difference]: Start difference. First operand 695 states and 2201 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 21:30:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:51,147 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-03-10 21:30:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:51,147 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 18 [2021-03-10 21:30:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:51,148 INFO L225 Difference]: With dead ends: 836 [2021-03-10 21:30:51,148 INFO L226 Difference]: Without dead ends: 826 [2021-03-10 21:30:51,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:30:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-03-10 21:30:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-03-10 21:30:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-03-10 21:30:51,155 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-03-10 21:30:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:51,156 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-03-10 21:30:51,156 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 21:30:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-03-10 21:30:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:51,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:51,156 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:51,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5180,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:51,357 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash 763969291, now seen corresponding path program 143 times [2021-03-10 21:30:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:51,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366542096] [2021-03-10 21:30:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:51,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366542096] [2021-03-10 21:30:51,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884475800] [2021-03-10 21:30:51,452 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 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 21:30:51,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:30:51,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:51,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:51,757 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 21:30:51,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:51,997 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:51,997 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:51,998 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 21:30:52,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:52,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:52,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:52,235 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:52,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:52,236 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:52,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:52,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:52,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533736833] [2021-03-10 21:30:52,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:52,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:52,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:52,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:52,270 INFO L87 Difference]: Start difference. First operand 705 states and 2233 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 21:30:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:53,084 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-03-10 21:30:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:30:53,084 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 18 [2021-03-10 21:30:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:53,085 INFO L225 Difference]: With dead ends: 890 [2021-03-10 21:30:53,085 INFO L226 Difference]: Without dead ends: 868 [2021-03-10 21:30:53,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:30:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-03-10 21:30:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-03-10 21:30:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-03-10 21:30:53,093 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-03-10 21:30:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:53,093 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-03-10 21:30:53,093 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 21:30:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-03-10 21:30:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:53,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:53,093 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:53,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5295 [2021-03-10 21:30:53,294 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:53,294 INFO L82 PathProgramCache]: Analyzing trace with hash -288109881, now seen corresponding path program 144 times [2021-03-10 21:30:53,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:53,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958826866] [2021-03-10 21:30:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958826866] [2021-03-10 21:30:53,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466135014] [2021-03-10 21:30:53,389 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 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 21:30:53,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:30:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:53,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:53,703 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 21:30:53,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:53,940 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:53,940 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:53,940 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 21:30:54,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:54,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:54,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:54,206 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:54,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:54,207 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:54,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:54,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:54,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427687471] [2021-03-10 21:30:54,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:54,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:54,237 INFO L87 Difference]: Start difference. First operand 705 states and 2230 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 21:30:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:54,833 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-03-10 21:30:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:54,834 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 18 [2021-03-10 21:30:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:54,835 INFO L225 Difference]: With dead ends: 803 [2021-03-10 21:30:54,835 INFO L226 Difference]: Without dead ends: 798 [2021-03-10 21:30:54,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 631.3ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:30:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-03-10 21:30:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-03-10 21:30:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-03-10 21:30:54,841 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-03-10 21:30:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:54,842 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-03-10 21:30:54,842 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 21:30:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-03-10 21:30:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:54,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:54,842 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:55,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5431 [2021-03-10 21:30:55,043 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:55,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1457174155, now seen corresponding path program 145 times [2021-03-10 21:30:55,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:55,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399169079] [2021-03-10 21:30:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:55,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399169079] [2021-03-10 21:30:55,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244693204] [2021-03-10 21:30:55,138 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 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 21:30:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:55,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:55,454 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 21:30:55,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:55,835 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:55,835 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:55,836 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 21:30:55,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:55,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:55,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:55,948 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:55,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:55,949 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:55,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:55,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:55,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111899637] [2021-03-10 21:30:55,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:55,987 INFO L87 Difference]: Start difference. First operand 705 states and 2230 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 21:30:56,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:56,621 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-03-10 21:30:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:56,622 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 18 [2021-03-10 21:30:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:56,623 INFO L225 Difference]: With dead ends: 813 [2021-03-10 21:30:56,623 INFO L226 Difference]: Without dead ends: 808 [2021-03-10 21:30:56,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:30:56,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-03-10 21:30:56,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-03-10 21:30:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-03-10 21:30:56,630 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-03-10 21:30:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:56,631 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-03-10 21:30:56,631 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 21:30:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-03-10 21:30:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:56,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:56,631 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:56,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5584,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:56,834 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:56,834 INFO L82 PathProgramCache]: Analyzing trace with hash -646443817, now seen corresponding path program 146 times [2021-03-10 21:30:56,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:56,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021599372] [2021-03-10 21:30:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:56,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021599372] [2021-03-10 21:30:56,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818159459] [2021-03-10 21:30:56,945 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 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 21:30:56,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:56,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:57,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:57,236 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 21:30:57,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:57,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:57,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:57,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:30:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:57,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:57,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:57,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32490608] [2021-03-10 21:30:57,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:57,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:57,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:57,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:57,359 INFO L87 Difference]: Start difference. First operand 705 states and 2230 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 21:30:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:57,754 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-03-10 21:30:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:30:57,754 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 18 [2021-03-10 21:30:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:57,755 INFO L225 Difference]: With dead ends: 751 [2021-03-10 21:30:57,755 INFO L226 Difference]: Without dead ends: 733 [2021-03-10 21:30:57,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:30:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-03-10 21:30:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-03-10 21:30:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-03-10 21:30:57,762 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-03-10 21:30:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:57,762 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-03-10 21:30:57,762 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 21:30:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-03-10 21:30:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:57,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:57,763 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:57,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5766,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:57,964 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1571255993, now seen corresponding path program 147 times [2021-03-10 21:30:57,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:57,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832046448] [2021-03-10 21:30:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:58,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832046448] [2021-03-10 21:30:58,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106832653] [2021-03-10 21:30:58,058 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 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 21:30:58,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:30:58,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:58,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:58,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:58,352 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 21:30:58,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:58,628 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:30:58,628 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:30:58,628 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 21:30:58,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:58,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:58,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:58,799 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:30:58,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:58,800 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:30:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:58,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:58,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:30:58,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959921695] [2021-03-10 21:30:58,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:30:58,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:58,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:30:58,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:58,828 INFO L87 Difference]: Start difference. First operand 705 states and 2228 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 21:30:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:59,657 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-03-10 21:30:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:30:59,657 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 18 [2021-03-10 21:30:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:59,658 INFO L225 Difference]: With dead ends: 846 [2021-03-10 21:30:59,658 INFO L226 Difference]: Without dead ends: 836 [2021-03-10 21:30:59,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:30:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-03-10 21:30:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-03-10 21:30:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-03-10 21:30:59,665 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-03-10 21:30:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:59,665 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-03-10 21:30:59,665 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 21:30:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-03-10 21:30:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:30:59,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:59,666 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:59,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5844,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:59,867 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:59,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1456254125, now seen corresponding path program 148 times [2021-03-10 21:30:59,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:59,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288719975] [2021-03-10 21:30:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288719975] [2021-03-10 21:30:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234439230] [2021-03-10 21:30:59,967 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 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 21:30:59,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:59,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:59,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:30:59,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:00,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:00,269 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 21:31:00,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:00,522 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:00,523 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:00,523 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 21:31:00,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:00,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:00,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:00,619 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:00,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:00,620 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:00,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:00,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:31:00,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62685549] [2021-03-10 21:31:00,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:00,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:00,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:00,649 INFO L87 Difference]: Start difference. First operand 705 states and 2228 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 21:31:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:01,561 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-03-10 21:31:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:31:01,561 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 18 [2021-03-10 21:31:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:01,562 INFO L225 Difference]: With dead ends: 871 [2021-03-10 21:31:01,562 INFO L226 Difference]: Without dead ends: 856 [2021-03-10 21:31:01,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 863.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:31:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-03-10 21:31:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-03-10 21:31:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-03-10 21:31:01,570 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-03-10 21:31:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:01,570 INFO L480 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-03-10 21:31:01,570 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 21:31:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-03-10 21:31:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:01,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:01,571 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:01,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5999,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:01,772 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1093429135, now seen corresponding path program 149 times [2021-03-10 21:31:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:01,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042843655] [2021-03-10 21:31:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042843655] [2021-03-10 21:31:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886651744] [2021-03-10 21:31:01,877 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:01,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:01,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:01,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:02,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:02,196 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 21:31:02,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,434 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:02,434 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:02,434 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 21:31:02,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:02,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:02,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,676 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:02,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:02,677 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:02,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:02,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:31:02,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122558745] [2021-03-10 21:31:02,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:02,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:02,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:02,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:02,711 INFO L87 Difference]: Start difference. First operand 706 states and 2232 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 21:31:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:03,449 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-03-10 21:31:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:31:03,449 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 18 [2021-03-10 21:31:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:03,450 INFO L225 Difference]: With dead ends: 805 [2021-03-10 21:31:03,450 INFO L226 Difference]: Without dead ends: 800 [2021-03-10 21:31:03,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:31:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-03-10 21:31:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-03-10 21:31:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-03-10 21:31:03,457 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-03-10 21:31:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:03,457 INFO L480 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-03-10 21:31:03,457 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 21:31:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-03-10 21:31:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:03,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:03,458 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:03,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6113 [2021-03-10 21:31:03,659 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:03,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:03,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2050717319, now seen corresponding path program 150 times [2021-03-10 21:31:03,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:03,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623591280] [2021-03-10 21:31:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:03,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623591280] [2021-03-10 21:31:03,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564775506] [2021-03-10 21:31:03,749 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 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 21:31:03,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:31:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:04,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:04,050 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 21:31:04,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:04,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:04,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:04,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:04,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:04,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:31:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213719663] [2021-03-10 21:31:04,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:31:04,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:04,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:31:04,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:04,229 INFO L87 Difference]: Start difference. First operand 706 states and 2232 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 21:31:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:04,614 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-03-10 21:31:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:31:04,614 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 18 [2021-03-10 21:31:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:04,615 INFO L225 Difference]: With dead ends: 817 [2021-03-10 21:31:04,615 INFO L226 Difference]: Without dead ends: 803 [2021-03-10 21:31:04,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-03-10 21:31:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-03-10 21:31:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-03-10 21:31:04,623 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-03-10 21:31:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:04,623 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-03-10 21:31:04,623 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 21:31:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-03-10 21:31:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:04,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:04,624 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:04,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6254 [2021-03-10 21:31:04,825 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1500666617, now seen corresponding path program 151 times [2021-03-10 21:31:04,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:04,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044104106] [2021-03-10 21:31:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:04,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044104106] [2021-03-10 21:31:04,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470647859] [2021-03-10 21:31:04,923 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 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 21:31:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:04,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:05,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:05,207 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 21:31:05,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:05,448 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:05,448 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:05,448 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 21:31:05,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:05,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:05,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:05,555 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:05,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:05,556 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:05,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:05,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:31:05,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382021893] [2021-03-10 21:31:05,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:31:05,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:31:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:05,587 INFO L87 Difference]: Start difference. First operand 780 states and 2481 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 21:31:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:06,345 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-03-10 21:31:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:31:06,345 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 18 [2021-03-10 21:31:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:06,346 INFO L225 Difference]: With dead ends: 881 [2021-03-10 21:31:06,346 INFO L226 Difference]: Without dead ends: 871 [2021-03-10 21:31:06,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:31:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-03-10 21:31:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-03-10 21:31:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-03-10 21:31:06,354 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-03-10 21:31:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:06,354 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-03-10 21:31:06,354 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 21:31:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-03-10 21:31:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:06,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:06,355 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:06,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6333 [2021-03-10 21:31:06,556 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash -649522485, now seen corresponding path program 152 times [2021-03-10 21:31:06,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:06,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855897788] [2021-03-10 21:31:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:06,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855897788] [2021-03-10 21:31:06,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080516744] [2021-03-10 21:31:06,650 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 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 21:31:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:06,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:06,935 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 21:31:07,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:07,181 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:07,181 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:07,181 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 21:31:07,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:07,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:07,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:07,331 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:07,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:07,332 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:07,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:07,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:31:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578280857] [2021-03-10 21:31:07,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:31:07,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:31:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:07,361 INFO L87 Difference]: Start difference. First operand 783 states and 2493 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 21:31:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:08,080 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-03-10 21:31:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:31:08,080 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 18 [2021-03-10 21:31:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:08,082 INFO L225 Difference]: With dead ends: 914 [2021-03-10 21:31:08,082 INFO L226 Difference]: Without dead ends: 904 [2021-03-10 21:31:08,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:31:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-03-10 21:31:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-03-10 21:31:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-03-10 21:31:08,091 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-03-10 21:31:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:08,091 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-03-10 21:31:08,091 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 21:31:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-03-10 21:31:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:08,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:08,092 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:08,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-03-10 21:31:08,292 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash -33858169, now seen corresponding path program 153 times [2021-03-10 21:31:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:08,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140581117] [2021-03-10 21:31:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:08,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140581117] [2021-03-10 21:31:08,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160717147] [2021-03-10 21:31:08,379 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 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 21:31:08,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:08,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:08,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:08,691 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 21:31:08,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:08,969 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:08,969 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:08,969 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 21:31:09,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:09,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:09,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:09,125 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:09,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:09,126 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:09,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:09,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:31:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734425383] [2021-03-10 21:31:09,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:31:09,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:31:09,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:09,171 INFO L87 Difference]: Start difference. First operand 808 states and 2579 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 21:31:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:10,049 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-03-10 21:31:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:31:10,050 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 18 [2021-03-10 21:31:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:10,051 INFO L225 Difference]: With dead ends: 960 [2021-03-10 21:31:10,051 INFO L226 Difference]: Without dead ends: 950 [2021-03-10 21:31:10,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:31:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-03-10 21:31:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-03-10 21:31:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-03-10 21:31:10,059 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-03-10 21:31:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:10,059 INFO L480 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-03-10 21:31:10,059 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 21:31:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-03-10 21:31:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:10,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:10,060 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:10,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6573,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:10,261 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1871866443, now seen corresponding path program 154 times [2021-03-10 21:31:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:10,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416803858] [2021-03-10 21:31:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:10,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416803858] [2021-03-10 21:31:10,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090614976] [2021-03-10 21:31:10,349 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 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 21:31:10,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:10,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:10,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:10,648 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 21:31:10,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:10,892 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:10,892 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:10,892 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 21:31:11,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:11,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:11,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:11,024 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:11,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:11,025 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:11,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:11,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 21:31:11,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459141327] [2021-03-10 21:31:11,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:31:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:11,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:31:11,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:11,054 INFO L87 Difference]: Start difference. First operand 829 states and 2646 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 21:31:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:11,729 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-03-10 21:31:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:31:11,729 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 18 [2021-03-10 21:31:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:11,730 INFO L225 Difference]: With dead ends: 966 [2021-03-10 21:31:11,731 INFO L226 Difference]: Without dead ends: 951 [2021-03-10 21:31:11,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 667.7ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:31:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-10 21:31:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-03-10 21:31:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 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 21:31:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-03-10 21:31:11,739 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-03-10 21:31:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:11,739 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-03-10 21:31:11,739 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 21:31:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-03-10 21:31:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:11,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:11,740 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:11,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6731,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:11,943 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:11,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash 819787271, now seen corresponding path program 155 times [2021-03-10 21:31:11,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:11,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008183458] [2021-03-10 21:31:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:12,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008183458] [2021-03-10 21:31:12,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254191011] [2021-03-10 21:31:12,049 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 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 21:31:12,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:31:12,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:12,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:12,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:12,363 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 21:31:12,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:12,586 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:12,587 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:12,587 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 21:31:12,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:12,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:12,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:12,721 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:12,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:12,722 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:12,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:12,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:31:12,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921387063] [2021-03-10 21:31:12,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:12,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:12,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:12,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:12,752 INFO L87 Difference]: Start difference. First operand 835 states and 2662 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 21:31:13,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:13,592 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-03-10 21:31:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:31:13,593 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 18 [2021-03-10 21:31:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:13,594 INFO L225 Difference]: With dead ends: 1010 [2021-03-10 21:31:13,594 INFO L226 Difference]: Without dead ends: 995 [2021-03-10 21:31:13,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 865.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:31:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-03-10 21:31:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-03-10 21:31:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 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 21:31:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-03-10 21:31:13,606 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-03-10 21:31:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:13,606 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-03-10 21:31:13,606 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 21:31:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-03-10 21:31:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:13,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:13,608 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:13,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6846 [2021-03-10 21:31:13,823 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1729895989, now seen corresponding path program 156 times [2021-03-10 21:31:13,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:13,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648116930] [2021-03-10 21:31:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648116930] [2021-03-10 21:31:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533665613] [2021-03-10 21:31:13,922 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 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 21:31:13,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:13,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:14,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:14,256 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 21:31:14,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:14,572 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:14,572 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:14,572 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 21:31:14,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:14,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:14,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:14,722 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:14,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:14,722 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:14,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:14,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:31:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404550927] [2021-03-10 21:31:14,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:14,769 INFO L87 Difference]: Start difference. First operand 835 states and 2662 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 21:31:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:15,478 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-03-10 21:31:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:15,479 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 18 [2021-03-10 21:31:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:15,480 INFO L225 Difference]: With dead ends: 964 [2021-03-10 21:31:15,480 INFO L226 Difference]: Without dead ends: 959 [2021-03-10 21:31:15,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:31:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-03-10 21:31:15,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-03-10 21:31:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 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 21:31:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-03-10 21:31:15,488 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-03-10 21:31:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:15,488 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-03-10 21:31:15,488 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 21:31:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-03-10 21:31:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:31:15,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:15,489 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:15,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6942,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:15,690 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash 834301575, now seen corresponding path program 157 times [2021-03-10 21:31:15,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:15,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030410663] [2021-03-10 21:31:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:15,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030410663] [2021-03-10 21:31:15,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109075251] [2021-03-10 21:31:15,789 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 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 21:31:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:15,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:31:15,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:16,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:16,120 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 21:31:16,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:16,393 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-03-10 21:31:16,394 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-03-10 21:31:16,394 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 21:31:16,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:31:16,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:16,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:16,507 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:31:16,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:16,508 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-03-10 21:31:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:16,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:16,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:31:16,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267454119] [2021-03-10 21:31:16,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:16,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:16,538 INFO L87 Difference]: Start difference. First operand 835 states and 2662 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 21:31:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:17,242 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-03-10 21:31:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:17,242 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 18 [2021-03-10 21:31:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:17,244 INFO L225 Difference]: With dead ends: 980 [2021-03-10 21:31:17,244 INFO L226 Difference]: Without dead ends: 975 [2021-03-10 21:31:17,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 756.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:31:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-03-10 21:31:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-03-10 21:31:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 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 21:31:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-03-10 21:31:17,252 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-03-10 21:31:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:17,252 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-03-10 21:31:17,252 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 21:31:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-03-10 21:31:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:17,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:17,253 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:17,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7124 [2021-03-10 21:31:17,454 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1301661189, now seen corresponding path program 158 times [2021-03-10 21:31:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:17,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22846070] [2021-03-10 21:31:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:17,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22846070] [2021-03-10 21:31:17,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280460730] [2021-03-10 21:31:17,637 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 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 21:31:17,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:17,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:17,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:18,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:18,089 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 21:31:18,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:18,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:18,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:18,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:18,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:18,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:18,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134375096] [2021-03-10 21:31:18,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:18,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:18,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:18,491 INFO L87 Difference]: Start difference. First operand 837 states and 2665 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 21:31:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:18,851 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-03-10 21:31:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:31:18,851 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 19 [2021-03-10 21:31:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:18,852 INFO L225 Difference]: With dead ends: 905 [2021-03-10 21:31:18,852 INFO L226 Difference]: Without dead ends: 883 [2021-03-10 21:31:18,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-03-10 21:31:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-03-10 21:31:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-03-10 21:31:18,861 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-03-10 21:31:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:18,861 INFO L480 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-03-10 21:31:18,861 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 21:31:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-03-10 21:31:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:18,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:18,862 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:19,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7226,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:19,062 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash -649128821, now seen corresponding path program 159 times [2021-03-10 21:31:19,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:19,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738347715] [2021-03-10 21:31:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:19,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738347715] [2021-03-10 21:31:19,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524267902] [2021-03-10 21:31:19,202 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 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 21:31:19,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:31:19,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:19,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:19,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:19,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:19,559 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 21:31:19,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:19,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:19,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:19,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:19,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:19,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:19,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799820583] [2021-03-10 21:31:20,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:20,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:20,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:20,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:20,000 INFO L87 Difference]: Start difference. First operand 840 states and 2671 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 21:31:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:20,456 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-03-10 21:31:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:20,456 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 19 [2021-03-10 21:31:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:20,457 INFO L225 Difference]: With dead ends: 899 [2021-03-10 21:31:20,457 INFO L226 Difference]: Without dead ends: 880 [2021-03-10 21:31:20,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-03-10 21:31:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-03-10 21:31:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 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 21:31:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-03-10 21:31:20,466 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-03-10 21:31:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:20,466 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-03-10 21:31:20,466 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 21:31:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-03-10 21:31:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:20,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:20,467 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:20,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7455 [2021-03-10 21:31:20,668 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:20,668 INFO L82 PathProgramCache]: Analyzing trace with hash 203204603, now seen corresponding path program 160 times [2021-03-10 21:31:20,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:20,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230392820] [2021-03-10 21:31:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:20,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230392820] [2021-03-10 21:31:20,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171277372] [2021-03-10 21:31:20,811 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 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 21:31:20,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:20,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:20,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:21,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:21,184 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 21:31:21,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:21,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:21,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:21,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:21,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:21,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679651186] [2021-03-10 21:31:21,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:21,439 INFO L87 Difference]: Start difference. First operand 842 states and 2667 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 21:31:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:21,896 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-03-10 21:31:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:21,897 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 19 [2021-03-10 21:31:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:21,898 INFO L225 Difference]: With dead ends: 889 [2021-03-10 21:31:21,898 INFO L226 Difference]: Without dead ends: 878 [2021-03-10 21:31:21,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-03-10 21:31:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-03-10 21:31:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-03-10 21:31:21,906 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-03-10 21:31:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:21,906 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-03-10 21:31:21,906 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 21:31:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-03-10 21:31:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:21,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:21,907 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:22,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7663 [2021-03-10 21:31:22,108 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:22,108 INFO L82 PathProgramCache]: Analyzing trace with hash 946787963, now seen corresponding path program 161 times [2021-03-10 21:31:22,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:22,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734532316] [2021-03-10 21:31:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:22,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734532316] [2021-03-10 21:31:22,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834182230] [2021-03-10 21:31:22,252 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 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 21:31:22,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:31:22,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:22,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:22,647 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:22,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:22,647 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 37 treesize of output 252 [2021-03-10 21:31:23,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:23,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:23,654 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 21:31:24,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:24,194 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:24,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:24,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:24,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:24,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:31:24,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850054828] [2021-03-10 21:31:24,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:31:24,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:24,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:31:24,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:24,232 INFO L87 Difference]: Start difference. First operand 843 states and 2663 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 21:31:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:24,772 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-03-10 21:31:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:31:24,773 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 19 [2021-03-10 21:31:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:24,774 INFO L225 Difference]: With dead ends: 922 [2021-03-10 21:31:24,774 INFO L226 Difference]: Without dead ends: 910 [2021-03-10 21:31:24,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-03-10 21:31:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-03-10 21:31:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-03-10 21:31:24,782 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-03-10 21:31:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:24,782 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-03-10 21:31:24,782 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 21:31:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-03-10 21:31:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:24,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:24,783 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:24,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7792,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:24,984 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash 274927871, now seen corresponding path program 162 times [2021-03-10 21:31:24,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:24,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819192136] [2021-03-10 21:31:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:25,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819192136] [2021-03-10 21:31:25,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710533513] [2021-03-10 21:31:25,090 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 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 21:31:25,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:31:25,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:25,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:25,469 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:25,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:25,470 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 37 treesize of output 252 [2021-03-10 21:31:25,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:25,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:25,940 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 21:31:26,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:26,444 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:26,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:26,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:26,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:26,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:26,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567144232] [2021-03-10 21:31:26,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:26,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:26,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:26,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:26,477 INFO L87 Difference]: Start difference. First operand 839 states and 2653 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 21:31:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:27,143 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-03-10 21:31:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:31:27,143 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 19 [2021-03-10 21:31:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:27,145 INFO L225 Difference]: With dead ends: 960 [2021-03-10 21:31:27,145 INFO L226 Difference]: Without dead ends: 946 [2021-03-10 21:31:27,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-03-10 21:31:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-03-10 21:31:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-03-10 21:31:27,153 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-03-10 21:31:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:27,153 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-03-10 21:31:27,153 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 21:31:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-03-10 21:31:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:27,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:27,154 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:27,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8372 [2021-03-10 21:31:27,355 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash -386335912, now seen corresponding path program 163 times [2021-03-10 21:31:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:27,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970354045] [2021-03-10 21:31:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970354045] [2021-03-10 21:31:27,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484019039] [2021-03-10 21:31:27,403 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 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 21:31:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:31:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:27,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:31:27,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289091866] [2021-03-10 21:31:27,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:27,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:27,459 INFO L87 Difference]: Start difference. First operand 844 states and 2663 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 21:31:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:27,538 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-03-10 21:31:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:31:27,538 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 19 [2021-03-10 21:31:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:27,539 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 21:31:27,539 INFO L226 Difference]: Without dead ends: 1106 [2021-03-10 21:31:27,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-03-10 21:31:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-03-10 21:31:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-03-10 21:31:27,548 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-03-10 21:31:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:27,548 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-03-10 21:31:27,548 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 21:31:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-03-10 21:31:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:27,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:27,551 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:27,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8777,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:27,771 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:27,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1288290309, now seen corresponding path program 164 times [2021-03-10 21:31:27,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:27,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354346896] [2021-03-10 21:31:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:27,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354346896] [2021-03-10 21:31:27,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550196277] [2021-03-10 21:31:27,883 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 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 21:31:27,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:27,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:27,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:28,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:28,207 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 35 treesize of output 193 [2021-03-10 21:31:28,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:28,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:28,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:28,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:28,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:28,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:28,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887748590] [2021-03-10 21:31:28,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:28,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:28,496 INFO L87 Difference]: Start difference. First operand 852 states and 2694 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 21:31:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:28,884 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-03-10 21:31:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:28,885 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 19 [2021-03-10 21:31:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:28,886 INFO L225 Difference]: With dead ends: 911 [2021-03-10 21:31:28,886 INFO L226 Difference]: Without dead ends: 900 [2021-03-10 21:31:28,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-03-10 21:31:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-03-10 21:31:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-03-10 21:31:28,898 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-03-10 21:31:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:28,898 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-03-10 21:31:28,898 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 21:31:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-03-10 21:31:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:28,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:28,900 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:29,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8778,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:29,120 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash -544706949, now seen corresponding path program 165 times [2021-03-10 21:31:29,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:29,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958660014] [2021-03-10 21:31:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:29,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958660014] [2021-03-10 21:31:29,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657356077] [2021-03-10 21:31:29,254 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 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 21:31:29,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:31:29,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:29,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:29,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:29,615 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:29,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:29,616 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 37 treesize of output 252 [2021-03-10 21:31:30,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:30,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:30,174 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 21:31:30,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:30,802 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:30,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:30,803 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:30,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:30,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:30,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269288414] [2021-03-10 21:31:30,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:30,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:30,841 INFO L87 Difference]: Start difference. First operand 856 states and 2702 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 21:31:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:31,300 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-03-10 21:31:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:31,301 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 19 [2021-03-10 21:31:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:31,302 INFO L225 Difference]: With dead ends: 946 [2021-03-10 21:31:31,302 INFO L226 Difference]: Without dead ends: 936 [2021-03-10 21:31:31,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-03-10 21:31:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-03-10 21:31:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-03-10 21:31:31,311 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-03-10 21:31:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:31,311 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-03-10 21:31:31,311 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 21:31:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-03-10 21:31:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:31,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:31,312 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:31,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8916,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:31,513 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 306437183, now seen corresponding path program 166 times [2021-03-10 21:31:31,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:31,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189923461] [2021-03-10 21:31:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:31,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189923461] [2021-03-10 21:31:31,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134346865] [2021-03-10 21:31:31,614 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 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 21:31:31,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:31,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:31,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:31,997 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:31,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:31,998 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 37 treesize of output 252 [2021-03-10 21:31:33,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:33,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:33,185 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 21:31:33,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:33,538 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:33,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:33,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:33,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:33,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:33,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904991721] [2021-03-10 21:31:33,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:33,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:33,576 INFO L87 Difference]: Start difference. First operand 858 states and 2705 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 21:31:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:34,222 INFO L93 Difference]: Finished difference Result 1005 states and 2998 transitions. [2021-03-10 21:31:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:31:34,223 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 19 [2021-03-10 21:31:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:34,224 INFO L225 Difference]: With dead ends: 1005 [2021-03-10 21:31:34,224 INFO L226 Difference]: Without dead ends: 993 [2021-03-10 21:31:34,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:31:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-03-10 21:31:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 865. [2021-03-10 21:31:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.1481481481481484) internal successors, (2720), 864 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2720 transitions. [2021-03-10 21:31:34,234 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2720 transitions. Word has length 19 [2021-03-10 21:31:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:34,234 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 2720 transitions. [2021-03-10 21:31:34,234 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 21:31:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2720 transitions. [2021-03-10 21:31:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:34,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:34,235 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:34,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9322 [2021-03-10 21:31:34,436 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash 922101499, now seen corresponding path program 167 times [2021-03-10 21:31:34,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:34,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110697272] [2021-03-10 21:31:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:34,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110697272] [2021-03-10 21:31:34,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210381682] [2021-03-10 21:31:34,554 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 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 21:31:34,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:31:34,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:34,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:34,938 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:34,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:34,939 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 37 treesize of output 252 [2021-03-10 21:31:35,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:35,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:35,896 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 21:31:36,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:36,064 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:36,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:36,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:36,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:36,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:36,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336428252] [2021-03-10 21:31:36,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:36,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:36,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:36,100 INFO L87 Difference]: Start difference. First operand 865 states and 2720 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 21:31:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:36,935 INFO L93 Difference]: Finished difference Result 1028 states and 3047 transitions. [2021-03-10 21:31:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:31:36,935 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 19 [2021-03-10 21:31:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:36,936 INFO L225 Difference]: With dead ends: 1028 [2021-03-10 21:31:36,936 INFO L226 Difference]: Without dead ends: 1010 [2021-03-10 21:31:36,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:31:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-03-10 21:31:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 859. [2021-03-10 21:31:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.155011655011655) internal successors, (2707), 858 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2707 transitions. [2021-03-10 21:31:36,946 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2707 transitions. Word has length 19 [2021-03-10 21:31:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:36,946 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2707 transitions. [2021-03-10 21:31:36,946 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 21:31:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2707 transitions. [2021-03-10 21:31:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:36,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:36,947 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:37,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9990 [2021-03-10 21:31:37,147 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:37,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1879280894, now seen corresponding path program 168 times [2021-03-10 21:31:37,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:37,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2773374] [2021-03-10 21:31:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:37,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2773374] [2021-03-10 21:31:37,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753737606] [2021-03-10 21:31:37,193 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 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 21:31:37,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:37,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:31:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:37,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:37,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:31:37,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800959801] [2021-03-10 21:31:37,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:31:37,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:31:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:37,256 INFO L87 Difference]: Start difference. First operand 859 states and 2707 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 21:31:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:37,355 INFO L93 Difference]: Finished difference Result 1177 states and 3295 transitions. [2021-03-10 21:31:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:31:37,355 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 19 [2021-03-10 21:31:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:37,356 INFO L225 Difference]: With dead ends: 1177 [2021-03-10 21:31:37,356 INFO L226 Difference]: Without dead ends: 1177 [2021-03-10 21:31:37,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:31:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-03-10 21:31:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 872. [2021-03-10 21:31:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.1607347876004592) internal successors, (2753), 871 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2753 transitions. [2021-03-10 21:31:37,366 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2753 transitions. Word has length 19 [2021-03-10 21:31:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:37,366 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2753 transitions. [2021-03-10 21:31:37,366 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 21:31:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2753 transitions. [2021-03-10 21:31:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:37,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:37,367 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:37,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10386 [2021-03-10 21:31:37,570 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:37,571 INFO L82 PathProgramCache]: Analyzing trace with hash -311501637, now seen corresponding path program 169 times [2021-03-10 21:31:37,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:37,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481712837] [2021-03-10 21:31:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:37,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481712837] [2021-03-10 21:31:37,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389828055] [2021-03-10 21:31:37,734 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 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 21:31:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:37,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:37,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:38,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:38,064 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 21:31:38,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:38,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:38,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:38,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:38,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:38,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:38,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398982212] [2021-03-10 21:31:38,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:38,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:38,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:38,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:38,183 INFO L87 Difference]: Start difference. First operand 872 states and 2753 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 21:31:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:38,632 INFO L93 Difference]: Finished difference Result 931 states and 2872 transitions. [2021-03-10 21:31:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:38,632 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 19 [2021-03-10 21:31:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:38,634 INFO L225 Difference]: With dead ends: 931 [2021-03-10 21:31:38,634 INFO L226 Difference]: Without dead ends: 918 [2021-03-10 21:31:38,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-03-10 21:31:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 874. [2021-03-10 21:31:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.150057273768614) internal successors, (2750), 873 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2750 transitions. [2021-03-10 21:31:38,642 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2750 transitions. Word has length 19 [2021-03-10 21:31:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:38,642 INFO L480 AbstractCegarLoop]: Abstraction has 874 states and 2750 transitions. [2021-03-10 21:31:38,643 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 21:31:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2750 transitions. [2021-03-10 21:31:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:38,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:38,644 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:38,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10387 [2021-03-10 21:31:38,865 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:38,866 INFO L82 PathProgramCache]: Analyzing trace with hash 432081723, now seen corresponding path program 170 times [2021-03-10 21:31:38,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:38,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467160141] [2021-03-10 21:31:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:38,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467160141] [2021-03-10 21:31:38,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259398352] [2021-03-10 21:31:38,977 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 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 21:31:38,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:38,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:39,329 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:39,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:39,330 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 37 treesize of output 252 [2021-03-10 21:31:40,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:40,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:40,495 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 21:31:40,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:40,676 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:40,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:40,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:40,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:40,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:40,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175090289] [2021-03-10 21:31:40,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:40,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:40,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:40,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:40,711 INFO L87 Difference]: Start difference. First operand 874 states and 2750 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 21:31:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:41,419 INFO L93 Difference]: Finished difference Result 990 states and 2998 transitions. [2021-03-10 21:31:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:31:41,420 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 19 [2021-03-10 21:31:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:41,421 INFO L225 Difference]: With dead ends: 990 [2021-03-10 21:31:41,421 INFO L226 Difference]: Without dead ends: 980 [2021-03-10 21:31:41,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-03-10 21:31:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 876. [2021-03-10 21:31:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.1462857142857144) internal successors, (2753), 875 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2753 transitions. [2021-03-10 21:31:41,430 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2753 transitions. Word has length 19 [2021-03-10 21:31:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:41,430 INFO L480 AbstractCegarLoop]: Abstraction has 876 states and 2753 transitions. [2021-03-10 21:31:41,430 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 21:31:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2753 transitions. [2021-03-10 21:31:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:41,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:41,431 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:41,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:41,632 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1283225855, now seen corresponding path program 171 times [2021-03-10 21:31:41,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:41,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816822457] [2021-03-10 21:31:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:41,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816822457] [2021-03-10 21:31:41,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177643952] [2021-03-10 21:31:41,737 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 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 21:31:41,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:31:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:41,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:42,099 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:42,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:42,099 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 37 treesize of output 252 [2021-03-10 21:31:42,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:42,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:42,618 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 35 treesize of output 193 [2021-03-10 21:31:43,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:43,127 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:43,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:43,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:43,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:43,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:43,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165819109] [2021-03-10 21:31:43,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:43,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:43,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:43,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:43,161 INFO L87 Difference]: Start difference. First operand 876 states and 2753 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 21:31:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:43,897 INFO L93 Difference]: Finished difference Result 1048 states and 3120 transitions. [2021-03-10 21:31:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:31:43,897 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 19 [2021-03-10 21:31:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:43,899 INFO L225 Difference]: With dead ends: 1048 [2021-03-10 21:31:43,899 INFO L226 Difference]: Without dead ends: 1036 [2021-03-10 21:31:43,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:31:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-03-10 21:31:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 882. [2021-03-10 21:31:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.1362088535754826) internal successors, (2763), 881 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2763 transitions. [2021-03-10 21:31:43,908 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2763 transitions. Word has length 19 [2021-03-10 21:31:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:43,908 INFO L480 AbstractCegarLoop]: Abstraction has 882 states and 2763 transitions. [2021-03-10 21:31:43,909 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 21:31:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2763 transitions. [2021-03-10 21:31:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:43,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:43,909 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:44,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10927,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:44,110 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1898890171, now seen corresponding path program 172 times [2021-03-10 21:31:44,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:44,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735439539] [2021-03-10 21:31:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:44,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735439539] [2021-03-10 21:31:44,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436157378] [2021-03-10 21:31:44,241 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 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 21:31:44,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:44,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:44,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:44,652 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:44,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:44,653 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 37 treesize of output 252 [2021-03-10 21:31:45,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:45,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:45,662 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 21:31:45,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:45,926 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:45,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:45,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:45,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:45,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094435751] [2021-03-10 21:31:45,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:45,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:45,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:45,961 INFO L87 Difference]: Start difference. First operand 882 states and 2763 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 21:31:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:46,866 INFO L93 Difference]: Finished difference Result 1071 states and 3169 transitions. [2021-03-10 21:31:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:31:46,866 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 19 [2021-03-10 21:31:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:46,868 INFO L225 Difference]: With dead ends: 1071 [2021-03-10 21:31:46,868 INFO L226 Difference]: Without dead ends: 1055 [2021-03-10 21:31:46,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:31:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-03-10 21:31:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 871. [2021-03-10 21:31:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.145977011494253) internal successors, (2737), 870 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2737 transitions. [2021-03-10 21:31:46,877 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2737 transitions. Word has length 19 [2021-03-10 21:31:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:46,877 INFO L480 AbstractCegarLoop]: Abstraction has 871 states and 2737 transitions. [2021-03-10 21:31:46,877 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 21:31:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2737 transitions. [2021-03-10 21:31:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:46,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:46,878 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:47,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11349 [2021-03-10 21:31:47,078 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash -490352513, now seen corresponding path program 173 times [2021-03-10 21:31:47,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:47,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223512676] [2021-03-10 21:31:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:47,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223512676] [2021-03-10 21:31:47,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258778827] [2021-03-10 21:31:47,192 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 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 21:31:47,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:31:47,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:47,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:47,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:47,618 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:47,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:47,618 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 37 treesize of output 252 [2021-03-10 21:31:48,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:48,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:48,200 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 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:48,369 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:48,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:48,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:48,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:48,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:48,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463302556] [2021-03-10 21:31:48,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:48,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:48,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:48,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:48,404 INFO L87 Difference]: Start difference. First operand 871 states and 2737 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 21:31:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:49,107 INFO L93 Difference]: Finished difference Result 960 states and 2897 transitions. [2021-03-10 21:31:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:31:49,107 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 19 [2021-03-10 21:31:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:49,108 INFO L225 Difference]: With dead ends: 960 [2021-03-10 21:31:49,108 INFO L226 Difference]: Without dead ends: 950 [2021-03-10 21:31:49,108 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 734.0ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:31:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-03-10 21:31:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 873. [2021-03-10 21:31:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.145642201834862) internal successors, (2743), 872 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2743 transitions. [2021-03-10 21:31:49,119 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2743 transitions. Word has length 19 [2021-03-10 21:31:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:49,119 INFO L480 AbstractCegarLoop]: Abstraction has 873 states and 2743 transitions. [2021-03-10 21:31:49,119 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 21:31:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2743 transitions. [2021-03-10 21:31:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:49,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:49,120 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:49,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11829,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:49,325 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:49,326 INFO L82 PathProgramCache]: Analyzing trace with hash -901042152, now seen corresponding path program 174 times [2021-03-10 21:31:49,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:49,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894916202] [2021-03-10 21:31:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894916202] [2021-03-10 21:31:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94922833] [2021-03-10 21:31:49,370 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 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 21:31:49,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:31:49,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:31:49,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:49,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:31:49,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851869509] [2021-03-10 21:31:49,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:31:49,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:49,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:31:49,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:31:49,432 INFO L87 Difference]: Start difference. First operand 873 states and 2743 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 21:31:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:49,538 INFO L93 Difference]: Finished difference Result 1515 states and 4478 transitions. [2021-03-10 21:31:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:31:49,538 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 19 [2021-03-10 21:31:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:49,540 INFO L225 Difference]: With dead ends: 1515 [2021-03-10 21:31:49,540 INFO L226 Difference]: Without dead ends: 1515 [2021-03-10 21:31:49,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-03-10 21:31:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1218. [2021-03-10 21:31:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.217748562037798) internal successors, (3916), 1217 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3916 transitions. [2021-03-10 21:31:49,552 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3916 transitions. Word has length 19 [2021-03-10 21:31:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:49,552 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 3916 transitions. [2021-03-10 21:31:49,552 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 21:31:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3916 transitions. [2021-03-10 21:31:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:49,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:49,553 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:49,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12157 [2021-03-10 21:31:49,754 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:49,754 INFO L82 PathProgramCache]: Analyzing trace with hash -95823877, now seen corresponding path program 175 times [2021-03-10 21:31:49,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:49,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758923174] [2021-03-10 21:31:49,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758923174] [2021-03-10 21:31:49,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273424411] [2021-03-10 21:31:49,906 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 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 21:31:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:50,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:50,254 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 21:31:50,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:50,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:50,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:50,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:31:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:50,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:50,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:31:50,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221529248] [2021-03-10 21:31:50,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:31:50,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:31:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:50,463 INFO L87 Difference]: Start difference. First operand 1218 states and 3916 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 21:31:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:50,991 INFO L93 Difference]: Finished difference Result 1253 states and 3983 transitions. [2021-03-10 21:31:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:50,991 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 19 [2021-03-10 21:31:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:50,993 INFO L225 Difference]: With dead ends: 1253 [2021-03-10 21:31:50,993 INFO L226 Difference]: Without dead ends: 1240 [2021-03-10 21:31:50,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 471.3ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-03-10 21:31:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1218. [2021-03-10 21:31:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.2021364009860314) internal successors, (3897), 1217 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3897 transitions. [2021-03-10 21:31:51,005 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3897 transitions. Word has length 19 [2021-03-10 21:31:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:51,005 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 3897 transitions. [2021-03-10 21:31:51,005 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 21:31:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3897 transitions. [2021-03-10 21:31:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:51,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:51,006 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:51,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12158 [2021-03-10 21:31:51,206 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash 647759483, now seen corresponding path program 176 times [2021-03-10 21:31:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:51,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923203724] [2021-03-10 21:31:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923203724] [2021-03-10 21:31:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564689747] [2021-03-10 21:31:51,319 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 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 21:31:51,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:51,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:51,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:51,676 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:51,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:51,676 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 37 treesize of output 252 [2021-03-10 21:31:52,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:52,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:52,595 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 21:31:53,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:53,441 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:53,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:53,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:53,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:53,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:53,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438399609] [2021-03-10 21:31:53,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:53,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:53,477 INFO L87 Difference]: Start difference. First operand 1218 states and 3897 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 21:31:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:54,082 INFO L93 Difference]: Finished difference Result 1328 states and 4149 transitions. [2021-03-10 21:31:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:54,083 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 19 [2021-03-10 21:31:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:54,084 INFO L225 Difference]: With dead ends: 1328 [2021-03-10 21:31:54,084 INFO L226 Difference]: Without dead ends: 1316 [2021-03-10 21:31:54,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-03-10 21:31:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1216. [2021-03-10 21:31:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.2008230452674895) internal successors, (3889), 1215 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3889 transitions. [2021-03-10 21:31:54,097 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3889 transitions. Word has length 19 [2021-03-10 21:31:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:54,097 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 3889 transitions. [2021-03-10 21:31:54,097 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 21:31:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3889 transitions. [2021-03-10 21:31:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:54,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:54,098 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:54,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12269 [2021-03-10 21:31:54,299 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1498903615, now seen corresponding path program 177 times [2021-03-10 21:31:54,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:54,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405367312] [2021-03-10 21:31:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:54,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405367312] [2021-03-10 21:31:54,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165292918] [2021-03-10 21:31:54,419 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 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 21:31:54,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:31:54,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:54,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:54,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:54,812 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:54,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:54,813 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 37 treesize of output 252 [2021-03-10 21:31:57,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:57,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:57,177 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 35 treesize of output 193 [2021-03-10 21:31:57,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:57,549 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:57,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:57,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:31:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:57,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:57,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:31:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688779070] [2021-03-10 21:31:57,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:31:57,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:31:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:57,583 INFO L87 Difference]: Start difference. First operand 1216 states and 3889 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 21:31:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:58,292 INFO L93 Difference]: Finished difference Result 1386 states and 4274 transitions. [2021-03-10 21:31:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:31:58,293 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 19 [2021-03-10 21:31:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:58,295 INFO L225 Difference]: With dead ends: 1386 [2021-03-10 21:31:58,295 INFO L226 Difference]: Without dead ends: 1376 [2021-03-10 21:31:58,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:31:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-03-10 21:31:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1225. [2021-03-10 21:31:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 3.195261437908497) internal successors, (3911), 1224 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 3911 transitions. [2021-03-10 21:31:58,308 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 3911 transitions. Word has length 19 [2021-03-10 21:31:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:58,308 INFO L480 AbstractCegarLoop]: Abstraction has 1225 states and 3911 transitions. [2021-03-10 21:31:58,308 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 21:31:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 3911 transitions. [2021-03-10 21:31:58,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:31:58,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:58,309 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:58,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12877,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:58,509 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2114567931, now seen corresponding path program 178 times [2021-03-10 21:31:58,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:58,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247224100] [2021-03-10 21:31:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247224100] [2021-03-10 21:31:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052658703] [2021-03-10 21:31:58,628 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 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 21:31:58,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:58,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:31:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:59,009 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:31:59,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:59,010 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 37 treesize of output 252 [2021-03-10 21:32:00,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:00,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:00,234 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 21:32:00,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:00,644 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:00,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:00,645 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:00,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:00,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047426192] [2021-03-10 21:32:00,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:00,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:00,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:00,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:00,679 INFO L87 Difference]: Start difference. First operand 1225 states and 3911 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 21:32:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:01,596 INFO L93 Difference]: Finished difference Result 1420 states and 4365 transitions. [2021-03-10 21:32:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:32:01,596 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 19 [2021-03-10 21:32:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:01,598 INFO L225 Difference]: With dead ends: 1420 [2021-03-10 21:32:01,598 INFO L226 Difference]: Without dead ends: 1408 [2021-03-10 21:32:01,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:32:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-03-10 21:32:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1210. [2021-03-10 21:32:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.197684036393714) internal successors, (3866), 1209 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 3866 transitions. [2021-03-10 21:32:01,610 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 3866 transitions. Word has length 19 [2021-03-10 21:32:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:01,611 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 3866 transitions. [2021-03-10 21:32:01,611 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 21:32:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 3866 transitions. [2021-03-10 21:32:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:01,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:01,612 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:01,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13789,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:01,813 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1223219970, now seen corresponding path program 179 times [2021-03-10 21:32:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:01,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549870385] [2021-03-10 21:32:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:01,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549870385] [2021-03-10 21:32:01,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069142328] [2021-03-10 21:32:01,859 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 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 21:32:01,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:01,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:01,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:01,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418544920] [2021-03-10 21:32:01,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:01,915 INFO L87 Difference]: Start difference. First operand 1210 states and 3866 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 21:32:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:01,995 INFO L93 Difference]: Finished difference Result 1527 states and 4504 transitions. [2021-03-10 21:32:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:01,996 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 19 [2021-03-10 21:32:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:01,997 INFO L225 Difference]: With dead ends: 1527 [2021-03-10 21:32:01,997 INFO L226 Difference]: Without dead ends: 1527 [2021-03-10 21:32:01,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-03-10 21:32:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1175. [2021-03-10 21:32:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.192504258943782) internal successors, (3748), 1174 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3748 transitions. [2021-03-10 21:32:02,011 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3748 transitions. Word has length 19 [2021-03-10 21:32:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:02,011 INFO L480 AbstractCegarLoop]: Abstraction has 1175 states and 3748 transitions. [2021-03-10 21:32:02,011 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 21:32:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3748 transitions. [2021-03-10 21:32:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:02,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:02,012 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:02,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14461,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:02,213 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash -274674753, now seen corresponding path program 180 times [2021-03-10 21:32:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:02,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329699954] [2021-03-10 21:32:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:02,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329699954] [2021-03-10 21:32:02,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465744469] [2021-03-10 21:32:02,327 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 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 21:32:02,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:02,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:02,734 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:02,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:02,734 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 37 treesize of output 252 [2021-03-10 21:32:02,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 21:32:03,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:03,079 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 21:32:03,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:03,229 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-03-10 21:32:03,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:03,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:03,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:03,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:03,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073389401] [2021-03-10 21:32:03,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:03,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:03,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:03,262 INFO L87 Difference]: Start difference. First operand 1175 states and 3748 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 21:32:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:04,019 INFO L93 Difference]: Finished difference Result 1250 states and 3880 transitions. [2021-03-10 21:32:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:04,019 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 19 [2021-03-10 21:32:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:04,021 INFO L225 Difference]: With dead ends: 1250 [2021-03-10 21:32:04,021 INFO L226 Difference]: Without dead ends: 1240 [2021-03-10 21:32:04,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 765.7ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:32:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-03-10 21:32:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1176. [2021-03-10 21:32:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.1923404255319148) internal successors, (3751), 1175 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3751 transitions. [2021-03-10 21:32:04,037 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3751 transitions. Word has length 19 [2021-03-10 21:32:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:04,037 INFO L480 AbstractCegarLoop]: Abstraction has 1176 states and 3751 transitions. [2021-03-10 21:32:04,037 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 21:32:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3751 transitions. [2021-03-10 21:32:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:04,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:04,039 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:04,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14462,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:04,260 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash -685364392, now seen corresponding path program 181 times [2021-03-10 21:32:04,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:04,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325339819] [2021-03-10 21:32:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325339819] [2021-03-10 21:32:04,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114973927] [2021-03-10 21:32:04,310 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 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 21:32:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:04,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:04,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025857928] [2021-03-10 21:32:04,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:04,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:04,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:04,369 INFO L87 Difference]: Start difference. First operand 1176 states and 3751 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 21:32:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:04,478 INFO L93 Difference]: Finished difference Result 1980 states and 6059 transitions. [2021-03-10 21:32:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:04,478 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 19 [2021-03-10 21:32:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:04,480 INFO L225 Difference]: With dead ends: 1980 [2021-03-10 21:32:04,480 INFO L226 Difference]: Without dead ends: 1980 [2021-03-10 21:32:04,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-03-10 21:32:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1733. [2021-03-10 21:32:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.25) internal successors, (5629), 1732 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5629 transitions. [2021-03-10 21:32:04,503 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5629 transitions. Word has length 19 [2021-03-10 21:32:04,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:04,503 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 5629 transitions. [2021-03-10 21:32:04,503 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 21:32:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5629 transitions. [2021-03-10 21:32:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:04,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:04,505 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:04,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14677 [2021-03-10 21:32:04,705 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1326753925, now seen corresponding path program 182 times [2021-03-10 21:32:04,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:04,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475716629] [2021-03-10 21:32:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475716629] [2021-03-10 21:32:04,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371223018] [2021-03-10 21:32:04,833 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 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 21:32:04,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:04,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:04,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:05,295 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:05,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:05,296 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 37 treesize of output 252 [2021-03-10 21:32:06,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:06,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:06,689 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 21:32:06,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:06,922 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:06,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:06,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:06,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:06,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:06,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479710797] [2021-03-10 21:32:06,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:06,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:06,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:06,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:06,957 INFO L87 Difference]: Start difference. First operand 1733 states and 5629 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 21:32:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:07,662 INFO L93 Difference]: Finished difference Result 1796 states and 5734 transitions. [2021-03-10 21:32:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:07,663 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 19 [2021-03-10 21:32:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:07,665 INFO L225 Difference]: With dead ends: 1796 [2021-03-10 21:32:07,665 INFO L226 Difference]: Without dead ends: 1786 [2021-03-10 21:32:07,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 854.3ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:32:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-10 21:32:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1733. [2021-03-10 21:32:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.25) internal successors, (5629), 1732 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5629 transitions. [2021-03-10 21:32:07,685 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5629 transitions. Word has length 19 [2021-03-10 21:32:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:07,685 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 5629 transitions. [2021-03-10 21:32:07,685 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 21:32:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5629 transitions. [2021-03-10 21:32:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:07,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:07,687 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:07,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14678 [2021-03-10 21:32:07,887 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1191710658, now seen corresponding path program 183 times [2021-03-10 21:32:07,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:07,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937453019] [2021-03-10 21:32:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:07,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937453019] [2021-03-10 21:32:07,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602505398] [2021-03-10 21:32:07,938 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 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 21:32:07,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:07,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:07,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:07,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:07,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555053457] [2021-03-10 21:32:07,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:07,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:07,997 INFO L87 Difference]: Start difference. First operand 1733 states and 5629 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 21:32:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:08,142 INFO L93 Difference]: Finished difference Result 2307 states and 7130 transitions. [2021-03-10 21:32:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:08,142 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 19 [2021-03-10 21:32:08,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:08,144 INFO L225 Difference]: With dead ends: 2307 [2021-03-10 21:32:08,144 INFO L226 Difference]: Without dead ends: 2307 [2021-03-10 21:32:08,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-03-10 21:32:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1980. [2021-03-10 21:32:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.265790803436079) internal successors, (6463), 1979 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6463 transitions. [2021-03-10 21:32:08,165 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6463 transitions. Word has length 19 [2021-03-10 21:32:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:08,165 INFO L480 AbstractCegarLoop]: Abstraction has 1980 states and 6463 transitions. [2021-03-10 21:32:08,165 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 21:32:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6463 transitions. [2021-03-10 21:32:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:08,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:08,167 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:08,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15178,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:08,367 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1038408603, now seen corresponding path program 184 times [2021-03-10 21:32:08,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:08,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211698725] [2021-03-10 21:32:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:08,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211698725] [2021-03-10 21:32:08,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588773048] [2021-03-10 21:32:08,466 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 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 21:32:08,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:08,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:08,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:08,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:08,815 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 35 treesize of output 193 [2021-03-10 21:32:09,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:09,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:09,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:09,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:09,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:09,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:32:09,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545378095] [2021-03-10 21:32:09,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:32:09,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:32:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:09,182 INFO L87 Difference]: Start difference. First operand 1980 states and 6463 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 21:32:09,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:09,497 INFO L93 Difference]: Finished difference Result 2005 states and 6504 transitions. [2021-03-10 21:32:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:32:09,498 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 21:32:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:09,500 INFO L225 Difference]: With dead ends: 2005 [2021-03-10 21:32:09,500 INFO L226 Difference]: Without dead ends: 1992 [2021-03-10 21:32:09,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-03-10 21:32:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1980. [2021-03-10 21:32:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.2647801920161696) internal successors, (6461), 1979 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6461 transitions. [2021-03-10 21:32:09,538 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6461 transitions. Word has length 19 [2021-03-10 21:32:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:09,538 INFO L480 AbstractCegarLoop]: Abstraction has 1980 states and 6461 transitions. [2021-03-10 21:32:09,538 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 21:32:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6461 transitions. [2021-03-10 21:32:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:09,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:09,540 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:09,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15179,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:09,740 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:09,741 INFO L82 PathProgramCache]: Analyzing trace with hash -186075179, now seen corresponding path program 185 times [2021-03-10 21:32:09,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:09,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441769166] [2021-03-10 21:32:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:09,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441769166] [2021-03-10 21:32:09,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635345535] [2021-03-10 21:32:09,859 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 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 21:32:09,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:09,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:09,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:10,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:10,207 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 35 treesize of output 193 [2021-03-10 21:32:10,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:10,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:10,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:10,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:10,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:10,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:32:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524134081] [2021-03-10 21:32:10,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:32:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:32:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:10,381 INFO L87 Difference]: Start difference. First operand 1980 states and 6461 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 21:32:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:10,747 INFO L93 Difference]: Finished difference Result 2005 states and 6509 transitions. [2021-03-10 21:32:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:10,748 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 21:32:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:10,750 INFO L225 Difference]: With dead ends: 2005 [2021-03-10 21:32:10,750 INFO L226 Difference]: Without dead ends: 1996 [2021-03-10 21:32:10,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-03-10 21:32:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1982. [2021-03-10 21:32:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.264512872286724) internal successors, (6467), 1981 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6467 transitions. [2021-03-10 21:32:10,779 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6467 transitions. Word has length 19 [2021-03-10 21:32:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:10,779 INFO L480 AbstractCegarLoop]: Abstraction has 1982 states and 6467 transitions. [2021-03-10 21:32:10,779 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 21:32:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6467 transitions. [2021-03-10 21:32:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:10,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:10,781 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:10,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15364,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:10,995 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:10,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:10,995 INFO L82 PathProgramCache]: Analyzing trace with hash 557508181, now seen corresponding path program 186 times [2021-03-10 21:32:10,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:10,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905200247] [2021-03-10 21:32:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:11,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905200247] [2021-03-10 21:32:11,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552307794] [2021-03-10 21:32:11,094 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 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 21:32:11,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:11,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:11,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:11,449 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:11,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:11,449 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 37 treesize of output 252 [2021-03-10 21:32:12,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:12,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:12,087 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 21:32:12,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:12,561 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-03-10 21:32:12,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:12,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:12,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:12,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:32:12,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151295309] [2021-03-10 21:32:12,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:32:12,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:32:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:12,596 INFO L87 Difference]: Start difference. First operand 1982 states and 6467 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 21:32:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:13,036 INFO L93 Difference]: Finished difference Result 2031 states and 6557 transitions. [2021-03-10 21:32:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:13,037 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 21:32:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:13,039 INFO L225 Difference]: With dead ends: 2031 [2021-03-10 21:32:13,039 INFO L226 Difference]: Without dead ends: 2021 [2021-03-10 21:32:13,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-03-10 21:32:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1981. [2021-03-10 21:32:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.264646464646465) internal successors, (6464), 1980 states have internal predecessors, (6464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6464 transitions. [2021-03-10 21:32:13,061 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6464 transitions. Word has length 19 [2021-03-10 21:32:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:13,061 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6464 transitions. [2021-03-10 21:32:13,061 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 21:32:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6464 transitions. [2021-03-10 21:32:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:13,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:13,063 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:13,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15459 [2021-03-10 21:32:13,263 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:13,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1900690751, now seen corresponding path program 187 times [2021-03-10 21:32:13,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:13,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606234050] [2021-03-10 21:32:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606234050] [2021-03-10 21:32:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280231697] [2021-03-10 21:32:13,364 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 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 21:32:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:13,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:13,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:13,809 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:13,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:13,810 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 37 treesize of output 252 [2021-03-10 21:32:16,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:16,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:16,123 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 21:32:16,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:16,440 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-03-10 21:32:16,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:16,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:16,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:16,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:16,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729974880] [2021-03-10 21:32:16,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:16,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:16,474 INFO L87 Difference]: Start difference. First operand 1981 states and 6464 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 21:32:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:17,197 INFO L93 Difference]: Finished difference Result 2091 states and 6704 transitions. [2021-03-10 21:32:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:17,197 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 21:32:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:17,200 INFO L225 Difference]: With dead ends: 2091 [2021-03-10 21:32:17,200 INFO L226 Difference]: Without dead ends: 2073 [2021-03-10 21:32:17,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:32:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-03-10 21:32:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1984. [2021-03-10 21:32:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.2612203731719616) internal successors, (6467), 1983 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 6467 transitions. [2021-03-10 21:32:17,221 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 6467 transitions. Word has length 19 [2021-03-10 21:32:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:17,222 INFO L480 AbstractCegarLoop]: Abstraction has 1984 states and 6467 transitions. [2021-03-10 21:32:17,222 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 21:32:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 6467 transitions. [2021-03-10 21:32:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:17,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:17,223 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:17,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15962 [2021-03-10 21:32:17,424 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash -911141607, now seen corresponding path program 188 times [2021-03-10 21:32:17,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:17,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531128874] [2021-03-10 21:32:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:17,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531128874] [2021-03-10 21:32:17,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920592768] [2021-03-10 21:32:17,572 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 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 21:32:17,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:17,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:17,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:18,054 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:18,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:18,054 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 37 treesize of output 252 [2021-03-10 21:32:19,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 21:32:19,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:19,149 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 21:32:19,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:19,541 INFO L628 ElimStorePlain]: treesize reduction 31, result has 36.7 percent of original size [2021-03-10 21:32:19,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:19,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:19,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:19,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:19,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799657373] [2021-03-10 21:32:19,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:19,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:19,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:19,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:19,577 INFO L87 Difference]: Start difference. First operand 1984 states and 6467 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 21:32:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:20,392 INFO L93 Difference]: Finished difference Result 2141 states and 6846 transitions. [2021-03-10 21:32:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:20,393 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 19 [2021-03-10 21:32:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:20,396 INFO L225 Difference]: With dead ends: 2141 [2021-03-10 21:32:20,396 INFO L226 Difference]: Without dead ends: 2121 [2021-03-10 21:32:20,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:32:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-03-10 21:32:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1986. [2021-03-10 21:32:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.256926952141058) internal successors, (6465), 1985 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6465 transitions. [2021-03-10 21:32:20,421 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6465 transitions. Word has length 19 [2021-03-10 21:32:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:20,421 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6465 transitions. [2021-03-10 21:32:20,421 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 21:32:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6465 transitions. [2021-03-10 21:32:20,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:20,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:20,423 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:20,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16827 [2021-03-10 21:32:20,623 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:20,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1963220779, now seen corresponding path program 189 times [2021-03-10 21:32:20,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:20,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484153760] [2021-03-10 21:32:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484153760] [2021-03-10 21:32:20,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016052410] [2021-03-10 21:32:20,775 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 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 21:32:20,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:20,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:20,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:20,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:21,197 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:21,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:21,198 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 37 treesize of output 252 [2021-03-10 21:32:21,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:21,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:21,636 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 21:32:21,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:21,885 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:21,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:21,885 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:21,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:21,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:21,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992889808] [2021-03-10 21:32:21,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:21,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:21,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:21,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:21,920 INFO L87 Difference]: Start difference. First operand 1986 states and 6465 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 21:32:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:22,703 INFO L93 Difference]: Finished difference Result 2047 states and 6565 transitions. [2021-03-10 21:32:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:22,704 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 19 [2021-03-10 21:32:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:22,706 INFO L225 Difference]: With dead ends: 2047 [2021-03-10 21:32:22,706 INFO L226 Difference]: Without dead ends: 2037 [2021-03-10 21:32:22,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:32:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-03-10 21:32:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1986. [2021-03-10 21:32:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.256926952141058) internal successors, (6465), 1985 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6465 transitions. [2021-03-10 21:32:22,730 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6465 transitions. Word has length 19 [2021-03-10 21:32:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:22,730 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6465 transitions. [2021-03-10 21:32:22,730 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 21:32:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6465 transitions. [2021-03-10 21:32:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:22,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:22,732 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:22,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17343 [2021-03-10 21:32:22,932 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:22,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1999747909, now seen corresponding path program 190 times [2021-03-10 21:32:22,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:22,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282897385] [2021-03-10 21:32:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:23,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282897385] [2021-03-10 21:32:23,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273807029] [2021-03-10 21:32:23,075 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 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 21:32:23,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:23,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:23,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:23,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:23,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:23,420 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 21:32:23,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:23,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:23,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:23,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:23,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:23,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:23,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425512092] [2021-03-10 21:32:23,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:23,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:23,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:23,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:23,731 INFO L87 Difference]: Start difference. First operand 1986 states and 6465 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 21:32:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:24,244 INFO L93 Difference]: Finished difference Result 2017 states and 6523 transitions. [2021-03-10 21:32:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:24,245 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 19 [2021-03-10 21:32:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:24,247 INFO L225 Difference]: With dead ends: 2017 [2021-03-10 21:32:24,247 INFO L226 Difference]: Without dead ends: 2006 [2021-03-10 21:32:24,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-03-10 21:32:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1986. [2021-03-10 21:32:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.2534005037783373) internal successors, (6458), 1985 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6458 transitions. [2021-03-10 21:32:24,268 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6458 transitions. Word has length 19 [2021-03-10 21:32:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:24,268 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6458 transitions. [2021-03-10 21:32:24,268 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 21:32:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6458 transitions. [2021-03-10 21:32:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:24,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:24,270 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:24,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17615,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:24,470 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:24,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1256164549, now seen corresponding path program 191 times [2021-03-10 21:32:24,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:24,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183536715] [2021-03-10 21:32:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:24,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183536715] [2021-03-10 21:32:24,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261356444] [2021-03-10 21:32:24,582 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 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 21:32:24,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:24,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:24,947 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:24,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:24,948 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 37 treesize of output 252 [2021-03-10 21:32:25,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:25,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:25,752 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 21:32:26,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:26,438 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:26,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:26,439 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:26,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:26,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:26,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55571176] [2021-03-10 21:32:26,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:26,474 INFO L87 Difference]: Start difference. First operand 1986 states and 6458 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 21:32:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:27,244 INFO L93 Difference]: Finished difference Result 2113 states and 6763 transitions. [2021-03-10 21:32:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:32:27,244 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 19 [2021-03-10 21:32:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:27,247 INFO L225 Difference]: With dead ends: 2113 [2021-03-10 21:32:27,247 INFO L226 Difference]: Without dead ends: 2103 [2021-03-10 21:32:27,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:32:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-03-10 21:32:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1986. [2021-03-10 21:32:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.2534005037783373) internal successors, (6458), 1985 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6458 transitions. [2021-03-10 21:32:27,271 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6458 transitions. Word has length 19 [2021-03-10 21:32:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:27,271 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6458 transitions. [2021-03-10 21:32:27,271 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 21:32:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6458 transitions. [2021-03-10 21:32:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:27,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:27,273 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:27,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17768,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:27,474 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash -405020417, now seen corresponding path program 192 times [2021-03-10 21:32:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:27,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603454288] [2021-03-10 21:32:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:27,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603454288] [2021-03-10 21:32:27,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098941099] [2021-03-10 21:32:27,581 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 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 21:32:27,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:27,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:27,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:27,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:28,049 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:28,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:28,049 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 37 treesize of output 252 [2021-03-10 21:32:30,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:30,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:30,749 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 21:32:31,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:31,129 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:31,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:31,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:31,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:31,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:31,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325457333] [2021-03-10 21:32:31,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:31,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:31,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:31,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:31,164 INFO L87 Difference]: Start difference. First operand 1986 states and 6458 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 21:32:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:32,279 INFO L93 Difference]: Finished difference Result 2223 states and 7047 transitions. [2021-03-10 21:32:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:32:32,280 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 19 [2021-03-10 21:32:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:32,283 INFO L225 Difference]: With dead ends: 2223 [2021-03-10 21:32:32,283 INFO L226 Difference]: Without dead ends: 2211 [2021-03-10 21:32:32,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 757.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:32:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-03-10 21:32:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2007. [2021-03-10 21:32:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 3.255234297108674) internal successors, (6530), 2006 states have internal predecessors, (6530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 6530 transitions. [2021-03-10 21:32:32,304 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 6530 transitions. Word has length 19 [2021-03-10 21:32:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:32,305 INFO L480 AbstractCegarLoop]: Abstraction has 2007 states and 6530 transitions. [2021-03-10 21:32:32,305 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 21:32:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 6530 transitions. [2021-03-10 21:32:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:32,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:32,306 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:32,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18277 [2021-03-10 21:32:32,507 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 210643899, now seen corresponding path program 193 times [2021-03-10 21:32:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:32,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249547181] [2021-03-10 21:32:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:32,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249547181] [2021-03-10 21:32:32,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685849541] [2021-03-10 21:32:32,640 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 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 21:32:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:32,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:33,043 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:33,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:33,044 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 37 treesize of output 252 [2021-03-10 21:32:33,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:33,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:33,529 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 21:32:33,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:33,862 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:33,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:33,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:33,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:33,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:33,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560043309] [2021-03-10 21:32:33,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:33,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:33,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:33,897 INFO L87 Difference]: Start difference. First operand 2007 states and 6530 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 21:32:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:35,039 INFO L93 Difference]: Finished difference Result 2310 states and 7299 transitions. [2021-03-10 21:32:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:32:35,040 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 19 [2021-03-10 21:32:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:35,043 INFO L225 Difference]: With dead ends: 2310 [2021-03-10 21:32:35,043 INFO L226 Difference]: Without dead ends: 2298 [2021-03-10 21:32:35,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 912.2ms TimeCoverageRelationStatistics Valid=302, Invalid=2050, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:32:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-03-10 21:32:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2004. [2021-03-10 21:32:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.251123315027459) internal successors, (6512), 2003 states have internal predecessors, (6512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6512 transitions. [2021-03-10 21:32:35,069 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6512 transitions. Word has length 19 [2021-03-10 21:32:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:35,069 INFO L480 AbstractCegarLoop]: Abstraction has 2004 states and 6512 transitions. [2021-03-10 21:32:35,069 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 21:32:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6512 transitions. [2021-03-10 21:32:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:35,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:35,070 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:35,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19246 [2021-03-10 21:32:35,271 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2116368511, now seen corresponding path program 194 times [2021-03-10 21:32:35,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:35,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316467494] [2021-03-10 21:32:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316467494] [2021-03-10 21:32:35,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069787980] [2021-03-10 21:32:35,401 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 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 21:32:35,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:35,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:35,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:35,807 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:35,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:35,807 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 37 treesize of output 252 [2021-03-10 21:32:36,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:36,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:36,512 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 21:32:36,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:36,721 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:36,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:36,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:36,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:36,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230474944] [2021-03-10 21:32:36,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:36,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:36,756 INFO L87 Difference]: Start difference. First operand 2004 states and 6512 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 21:32:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:37,977 INFO L93 Difference]: Finished difference Result 2336 states and 7411 transitions. [2021-03-10 21:32:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:32:37,978 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 19 [2021-03-10 21:32:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:37,980 INFO L225 Difference]: With dead ends: 2336 [2021-03-10 21:32:37,980 INFO L226 Difference]: Without dead ends: 2322 [2021-03-10 21:32:37,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1009.5ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:32:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-03-10 21:32:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1953. [2021-03-10 21:32:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.2223360655737703) internal successors, (6290), 1952 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6290 transitions. [2021-03-10 21:32:38,003 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6290 transitions. Word has length 19 [2021-03-10 21:32:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:38,003 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 6290 transitions. [2021-03-10 21:32:38,003 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 21:32:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6290 transitions. [2021-03-10 21:32:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:38,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:38,004 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:38,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19599 [2021-03-10 21:32:38,205 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678872, now seen corresponding path program 195 times [2021-03-10 21:32:38,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:38,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47498289] [2021-03-10 21:32:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:38,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47498289] [2021-03-10 21:32:38,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664272055] [2021-03-10 21:32:38,255 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 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 21:32:38,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:38,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:38,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:38,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:38,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:38,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362520382] [2021-03-10 21:32:38,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:38,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:38,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:38,317 INFO L87 Difference]: Start difference. First operand 1953 states and 6290 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 21:32:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:38,427 INFO L93 Difference]: Finished difference Result 2261 states and 6840 transitions. [2021-03-10 21:32:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:38,428 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 19 [2021-03-10 21:32:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:38,431 INFO L225 Difference]: With dead ends: 2261 [2021-03-10 21:32:38,431 INFO L226 Difference]: Without dead ends: 2261 [2021-03-10 21:32:38,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-03-10 21:32:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1192. [2021-03-10 21:32:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 3.1469353484466835) internal successors, (3748), 1191 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3748 transitions. [2021-03-10 21:32:38,448 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3748 transitions. Word has length 19 [2021-03-10 21:32:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:38,448 INFO L480 AbstractCegarLoop]: Abstraction has 1192 states and 3748 transitions. [2021-03-10 21:32:38,448 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 21:32:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3748 transitions. [2021-03-10 21:32:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:38,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:38,449 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:38,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19984 [2021-03-10 21:32:38,650 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1064289339, now seen corresponding path program 196 times [2021-03-10 21:32:38,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:38,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389076335] [2021-03-10 21:32:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:38,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389076335] [2021-03-10 21:32:38,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013935382] [2021-03-10 21:32:38,782 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 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 21:32:38,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:38,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:38,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:38,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:39,212 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:39,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:39,213 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 37 treesize of output 252 [2021-03-10 21:32:39,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:40,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:40,011 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 21:32:40,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:40,283 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:40,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:40,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:40,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:40,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:40,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312832148] [2021-03-10 21:32:40,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:40,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:40,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:40,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:40,318 INFO L87 Difference]: Start difference. First operand 1192 states and 3748 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 21:32:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:41,211 INFO L93 Difference]: Finished difference Result 1282 states and 3906 transitions. [2021-03-10 21:32:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:41,212 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 19 [2021-03-10 21:32:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:41,213 INFO L225 Difference]: With dead ends: 1282 [2021-03-10 21:32:41,213 INFO L226 Difference]: Without dead ends: 1272 [2021-03-10 21:32:41,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 933.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:32:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-03-10 21:32:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1192. [2021-03-10 21:32:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 3.1469353484466835) internal successors, (3748), 1191 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3748 transitions. [2021-03-10 21:32:41,225 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3748 transitions. Word has length 19 [2021-03-10 21:32:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:41,225 INFO L480 AbstractCegarLoop]: Abstraction has 1192 states and 3748 transitions. [2021-03-10 21:32:41,225 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 21:32:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3748 transitions. [2021-03-10 21:32:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:41,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:41,226 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:41,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19985,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:41,427 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:41,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1199332606, now seen corresponding path program 197 times [2021-03-10 21:32:41,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:41,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092985441] [2021-03-10 21:32:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:41,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092985441] [2021-03-10 21:32:41,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672478091] [2021-03-10 21:32:41,479 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 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 21:32:41,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:41,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:41,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:41,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:41,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729949565] [2021-03-10 21:32:41,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:41,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:41,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:41,572 INFO L87 Difference]: Start difference. First operand 1192 states and 3748 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 21:32:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:41,726 INFO L93 Difference]: Finished difference Result 1823 states and 5469 transitions. [2021-03-10 21:32:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:41,727 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 19 [2021-03-10 21:32:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:41,729 INFO L225 Difference]: With dead ends: 1823 [2021-03-10 21:32:41,729 INFO L226 Difference]: Without dead ends: 1823 [2021-03-10 21:32:41,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-03-10 21:32:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1427. [2021-03-10 21:32:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.1690042075736327) internal successors, (4519), 1426 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4519 transitions. [2021-03-10 21:32:41,746 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4519 transitions. Word has length 19 [2021-03-10 21:32:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:41,746 INFO L480 AbstractCegarLoop]: Abstraction has 1427 states and 4519 transitions. [2021-03-10 21:32:41,746 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 21:32:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4519 transitions. [2021-03-10 21:32:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:41,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:41,747 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:41,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20413 [2021-03-10 21:32:41,948 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1485393921, now seen corresponding path program 198 times [2021-03-10 21:32:41,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:41,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446527832] [2021-03-10 21:32:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:42,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446527832] [2021-03-10 21:32:42,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42132765] [2021-03-10 21:32:42,085 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 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 21:32:42,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:42,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:42,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:42,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:42,539 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:42,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:42,540 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 37 treesize of output 252 [2021-03-10 21:32:42,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:43,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:43,023 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 21:32:44,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:44,241 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:44,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:44,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:44,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:44,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633743394] [2021-03-10 21:32:44,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:44,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:44,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:44,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:44,278 INFO L87 Difference]: Start difference. First operand 1427 states and 4519 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 21:32:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:45,206 INFO L93 Difference]: Finished difference Result 1494 states and 4632 transitions. [2021-03-10 21:32:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:45,206 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 19 [2021-03-10 21:32:45,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:45,207 INFO L225 Difference]: With dead ends: 1494 [2021-03-10 21:32:45,208 INFO L226 Difference]: Without dead ends: 1484 [2021-03-10 21:32:45,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:32:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-03-10 21:32:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1427. [2021-03-10 21:32:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.1690042075736327) internal successors, (4519), 1426 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4519 transitions. [2021-03-10 21:32:45,221 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4519 transitions. Word has length 19 [2021-03-10 21:32:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:45,222 INFO L480 AbstractCegarLoop]: Abstraction has 1427 states and 4519 transitions. [2021-03-10 21:32:45,222 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 21:32:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4519 transitions. [2021-03-10 21:32:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:45,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:45,223 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:45,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20414 [2021-03-10 21:32:45,423 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:45,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1612499752, now seen corresponding path program 199 times [2021-03-10 21:32:45,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:45,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589301101] [2021-03-10 21:32:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589301101] [2021-03-10 21:32:45,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070817171] [2021-03-10 21:32:45,478 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 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 21:32:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:45,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220163002] [2021-03-10 21:32:45,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:45,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:45,545 INFO L87 Difference]: Start difference. First operand 1427 states and 4519 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 21:32:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:45,748 INFO L93 Difference]: Finished difference Result 1911 states and 5736 transitions. [2021-03-10 21:32:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:45,749 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 19 [2021-03-10 21:32:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:45,751 INFO L225 Difference]: With dead ends: 1911 [2021-03-10 21:32:45,751 INFO L226 Difference]: Without dead ends: 1911 [2021-03-10 21:32:45,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-03-10 21:32:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1581. [2021-03-10 21:32:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1759493670886076) internal successors, (5018), 1580 states have internal predecessors, (5018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5018 transitions. [2021-03-10 21:32:45,769 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5018 transitions. Word has length 19 [2021-03-10 21:32:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:45,769 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 5018 transitions. [2021-03-10 21:32:45,769 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 21:32:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5018 transitions. [2021-03-10 21:32:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:45,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:45,771 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:45,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21151,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:45,971 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash 705955403, now seen corresponding path program 200 times [2021-03-10 21:32:45,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:45,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584243428] [2021-03-10 21:32:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:46,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584243428] [2021-03-10 21:32:46,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829759145] [2021-03-10 21:32:46,099 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 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 21:32:46,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:46,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:46,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:46,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:46,459 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 21:32:46,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:46,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:46,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:46,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:46,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:46,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:46,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726782141] [2021-03-10 21:32:46,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:46,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:46,802 INFO L87 Difference]: Start difference. First operand 1581 states and 5018 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 21:32:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:47,159 INFO L93 Difference]: Finished difference Result 1605 states and 5056 transitions. [2021-03-10 21:32:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:47,160 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 21:32:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:47,162 INFO L225 Difference]: With dead ends: 1605 [2021-03-10 21:32:47,162 INFO L226 Difference]: Without dead ends: 1592 [2021-03-10 21:32:47,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-03-10 21:32:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1581. [2021-03-10 21:32:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1746835443037975) internal successors, (5016), 1580 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5016 transitions. [2021-03-10 21:32:47,178 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5016 transitions. Word has length 19 [2021-03-10 21:32:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:47,178 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 5016 transitions. [2021-03-10 21:32:47,178 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 21:32:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5016 transitions. [2021-03-10 21:32:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:47,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:47,180 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:47,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21152 [2021-03-10 21:32:47,380 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1558288827, now seen corresponding path program 201 times [2021-03-10 21:32:47,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:47,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310133976] [2021-03-10 21:32:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:47,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310133976] [2021-03-10 21:32:47,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457849556] [2021-03-10 21:32:47,527 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 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 21:32:47,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:32:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:47,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:47,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:47,879 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 21:32:48,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:48,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:48,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:48,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:48,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:48,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503347093] [2021-03-10 21:32:48,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:48,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:48,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:48,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:48,297 INFO L87 Difference]: Start difference. First operand 1581 states and 5016 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 21:32:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:48,838 INFO L93 Difference]: Finished difference Result 1606 states and 5064 transitions. [2021-03-10 21:32:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:32:48,838 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 21:32:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:48,840 INFO L225 Difference]: With dead ends: 1606 [2021-03-10 21:32:48,840 INFO L226 Difference]: Without dead ends: 1597 [2021-03-10 21:32:48,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-03-10 21:32:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1583. [2021-03-10 21:32:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.1744627054361567) internal successors, (5022), 1582 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5022 transitions. [2021-03-10 21:32:48,856 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5022 transitions. Word has length 19 [2021-03-10 21:32:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:48,856 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 5022 transitions. [2021-03-10 21:32:48,856 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 21:32:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5022 transitions. [2021-03-10 21:32:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:48,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:48,857 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:49,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21323 [2021-03-10 21:32:49,058 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:49,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1993095109, now seen corresponding path program 202 times [2021-03-10 21:32:49,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:49,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546645684] [2021-03-10 21:32:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:49,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546645684] [2021-03-10 21:32:49,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950715148] [2021-03-10 21:32:49,170 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 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 21:32:49,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:49,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:49,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:49,537 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:49,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:49,537 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 37 treesize of output 252 [2021-03-10 21:32:51,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:51,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:51,671 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 21:32:51,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:52,000 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:52,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:52,001 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:52,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:52,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:32:52,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828013674] [2021-03-10 21:32:52,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:32:52,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:32:52,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:52,036 INFO L87 Difference]: Start difference. First operand 1583 states and 5022 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 21:32:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:52,623 INFO L93 Difference]: Finished difference Result 1653 states and 5173 transitions. [2021-03-10 21:32:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:52,623 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 21:32:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:52,625 INFO L225 Difference]: With dead ends: 1653 [2021-03-10 21:32:52,625 INFO L226 Difference]: Without dead ends: 1643 [2021-03-10 21:32:52,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-03-10 21:32:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1582. [2021-03-10 21:32:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-03-10 21:32:52,642 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-03-10 21:32:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:52,642 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-03-10 21:32:52,642 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 21:32:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-03-10 21:32:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:52,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:52,644 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:52,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:52,844 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash -218856773, now seen corresponding path program 203 times [2021-03-10 21:32:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:52,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699855295] [2021-03-10 21:32:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:52,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699855295] [2021-03-10 21:32:52,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921561584] [2021-03-10 21:32:52,956 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 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 21:32:52,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:52,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:52,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:52,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:53,405 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:53,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:53,406 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 37 treesize of output 252 [2021-03-10 21:32:54,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:54,193 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 21:32:54,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:54,194 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 21:32:54,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:54,361 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:54,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:54,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:54,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:32:54,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257977775] [2021-03-10 21:32:54,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:32:54,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:54,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:32:54,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:54,396 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 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 21:32:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:55,188 INFO L93 Difference]: Finished difference Result 1688 states and 5263 transitions. [2021-03-10 21:32:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:55,188 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 19 [2021-03-10 21:32:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:55,190 INFO L225 Difference]: With dead ends: 1688 [2021-03-10 21:32:55,190 INFO L226 Difference]: Without dead ends: 1678 [2021-03-10 21:32:55,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 893.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:32:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-03-10 21:32:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1582. [2021-03-10 21:32:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-03-10 21:32:55,206 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-03-10 21:32:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:55,207 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-03-10 21:32:55,207 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 21:32:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-03-10 21:32:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:55,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:55,208 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:55,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22352,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,408 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1486313951, now seen corresponding path program 204 times [2021-03-10 21:32:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:55,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892549453] [2021-03-10 21:32:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:55,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892549453] [2021-03-10 21:32:55,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82108593] [2021-03-10 21:32:55,539 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 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 21:32:55,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:32:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:55,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:55,963 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:55,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:55,964 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 37 treesize of output 252 [2021-03-10 21:32:57,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:57,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:57,513 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 21:32:57,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:57,679 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:57,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:57,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:32:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:57,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:32:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938223342] [2021-03-10 21:32:57,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:32:57,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:57,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:32:57,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:57,715 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 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 21:32:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:58,700 INFO L93 Difference]: Finished difference Result 1757 states and 5460 transitions. [2021-03-10 21:32:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:32:58,700 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 19 [2021-03-10 21:32:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:58,702 INFO L225 Difference]: With dead ends: 1757 [2021-03-10 21:32:58,702 INFO L226 Difference]: Without dead ends: 1747 [2021-03-10 21:32:58,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1001.6ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:32:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-03-10 21:32:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1582. [2021-03-10 21:32:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-03-10 21:32:58,720 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-03-10 21:32:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:58,721 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-03-10 21:32:58,721 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 21:32:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-03-10 21:32:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:58,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:58,722 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:58,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22699,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:58,922 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash 258970085, now seen corresponding path program 205 times [2021-03-10 21:32:58,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:58,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027889303] [2021-03-10 21:32:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:59,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027889303] [2021-03-10 21:32:59,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889545264] [2021-03-10 21:32:59,056 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 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 21:32:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:59,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:32:59,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:59,510 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:32:59,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:59,511 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 37 treesize of output 252 [2021-03-10 21:33:01,804 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 887 [2021-03-10 21:33:02,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:02,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:02,740 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 21:33:03,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:03,144 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:03,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:03,145 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:03,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:03,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:33:03,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592553610] [2021-03-10 21:33:03,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:33:03,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:33:03,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:03,188 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 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 21:33:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:04,235 INFO L93 Difference]: Finished difference Result 1655 states and 5150 transitions. [2021-03-10 21:33:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:33:04,235 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 19 [2021-03-10 21:33:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:04,237 INFO L225 Difference]: With dead ends: 1655 [2021-03-10 21:33:04,237 INFO L226 Difference]: Without dead ends: 1645 [2021-03-10 21:33:04,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1106.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:33:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-03-10 21:33:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1582. [2021-03-10 21:33:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-03-10 21:33:04,254 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-03-10 21:33:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:04,254 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-03-10 21:33:04,254 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 21:33:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-03-10 21:33:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:04,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:04,255 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:04,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23336 [2021-03-10 21:33:04,456 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:04,456 INFO L82 PathProgramCache]: Analyzing trace with hash -891850757, now seen corresponding path program 206 times [2021-03-10 21:33:04,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:04,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234656756] [2021-03-10 21:33:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:04,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234656756] [2021-03-10 21:33:04,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015780196] [2021-03-10 21:33:04,600 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 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 21:33:04,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:04,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:04,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:04,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:04,951 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 21:33:05,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:05,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:05,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:05,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:33:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:05,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:05,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:05,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57902160] [2021-03-10 21:33:05,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:05,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:05,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:05,336 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 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 21:33:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:05,806 INFO L93 Difference]: Finished difference Result 1609 states and 5071 transitions. [2021-03-10 21:33:05,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:33:05,807 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 19 [2021-03-10 21:33:05,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:05,809 INFO L225 Difference]: With dead ends: 1609 [2021-03-10 21:33:05,809 INFO L226 Difference]: Without dead ends: 1600 [2021-03-10 21:33:05,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:33:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-03-10 21:33:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1582. [2021-03-10 21:33:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.173940543959519) internal successors, (5018), 1581 states have internal predecessors, (5018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5018 transitions. [2021-03-10 21:33:05,826 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5018 transitions. Word has length 19 [2021-03-10 21:33:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:05,826 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5018 transitions. [2021-03-10 21:33:05,826 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 21:33:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5018 transitions. [2021-03-10 21:33:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:05,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:05,827 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:06,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24370,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:06,028 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash -148267397, now seen corresponding path program 207 times [2021-03-10 21:33:06,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:06,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043527345] [2021-03-10 21:33:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:06,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043527345] [2021-03-10 21:33:06,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295931801] [2021-03-10 21:33:06,142 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 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 21:33:06,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:33:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:06,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:06,504 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:06,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:06,505 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 37 treesize of output 252 [2021-03-10 21:33:07,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:07,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:07,370 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 21:33:07,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:07,693 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:07,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:07,694 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:07,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:07,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:33:07,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970821685] [2021-03-10 21:33:07,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:33:07,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:07,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:33:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:33:07,730 INFO L87 Difference]: Start difference. First operand 1582 states and 5018 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 21:33:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:08,553 INFO L93 Difference]: Finished difference Result 1701 states and 5300 transitions. [2021-03-10 21:33:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:33:08,553 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 19 [2021-03-10 21:33:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:08,555 INFO L225 Difference]: With dead ends: 1701 [2021-03-10 21:33:08,555 INFO L226 Difference]: Without dead ends: 1691 [2021-03-10 21:33:08,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:33:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-03-10 21:33:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1582. [2021-03-10 21:33:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.173940543959519) internal successors, (5018), 1581 states have internal predecessors, (5018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5018 transitions. [2021-03-10 21:33:08,571 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5018 transitions. Word has length 19 [2021-03-10 21:33:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:08,571 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5018 transitions. [2021-03-10 21:33:08,571 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 21:33:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5018 transitions. [2021-03-10 21:33:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:08,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:08,573 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:08,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24546 [2021-03-10 21:33:08,773 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 702876735, now seen corresponding path program 208 times [2021-03-10 21:33:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:08,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280791607] [2021-03-10 21:33:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:08,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280791607] [2021-03-10 21:33:08,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229670150] [2021-03-10 21:33:08,891 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 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 21:33:08,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:08,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:09,294 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:09,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:09,295 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 37 treesize of output 252 [2021-03-10 21:33:09,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:10,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:10,038 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 21:33:10,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:10,333 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:10,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:10,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:10,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:10,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:33:10,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778250882] [2021-03-10 21:33:10,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:33:10,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:33:10,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:33:10,368 INFO L87 Difference]: Start difference. First operand 1582 states and 5018 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 21:33:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:11,469 INFO L93 Difference]: Finished difference Result 1802 states and 5550 transitions. [2021-03-10 21:33:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:33:11,470 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 19 [2021-03-10 21:33:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:11,472 INFO L225 Difference]: With dead ends: 1802 [2021-03-10 21:33:11,472 INFO L226 Difference]: Without dead ends: 1792 [2021-03-10 21:33:11,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 820.6ms TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:33:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-03-10 21:33:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1562. [2021-03-10 21:33:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.1729660474055095) internal successors, (4953), 1561 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4953 transitions. [2021-03-10 21:33:11,491 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4953 transitions. Word has length 19 [2021-03-10 21:33:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:11,491 INFO L480 AbstractCegarLoop]: Abstraction has 1562 states and 4953 transitions. [2021-03-10 21:33:11,491 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 21:33:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4953 transitions. [2021-03-10 21:33:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:11,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:11,492 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:11,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25043 [2021-03-10 21:33:11,693 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1318541051, now seen corresponding path program 209 times [2021-03-10 21:33:11,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:11,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298796346] [2021-03-10 21:33:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298796346] [2021-03-10 21:33:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579685636] [2021-03-10 21:33:11,814 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 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 21:33:11,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:11,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:11,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:11,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:12,212 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:12,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:12,213 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 37 treesize of output 252 [2021-03-10 21:33:12,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:13,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:13,034 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 21:33:13,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:13,253 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:13,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:13,254 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:13,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:13,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:13,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670306570] [2021-03-10 21:33:13,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:13,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:13,289 INFO L87 Difference]: Start difference. First operand 1562 states and 4953 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 21:33:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:14,560 INFO L93 Difference]: Finished difference Result 1858 states and 5660 transitions. [2021-03-10 21:33:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:33:14,561 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 19 [2021-03-10 21:33:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:14,563 INFO L225 Difference]: With dead ends: 1858 [2021-03-10 21:33:14,563 INFO L226 Difference]: Without dead ends: 1846 [2021-03-10 21:33:14,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1025.1ms TimeCoverageRelationStatistics Valid=348, Invalid=2408, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:33:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-03-10 21:33:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1580. [2021-03-10 21:33:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.175427485750475) internal successors, (5014), 1579 states have internal predecessors, (5014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5014 transitions. [2021-03-10 21:33:14,581 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5014 transitions. Word has length 19 [2021-03-10 21:33:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:14,581 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5014 transitions. [2021-03-10 21:33:14,581 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 21:33:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5014 transitions. [2021-03-10 21:33:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:14,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:14,582 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:14,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25449,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:14,783 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:14,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1070701633, now seen corresponding path program 210 times [2021-03-10 21:33:14,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:14,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436028699] [2021-03-10 21:33:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:14,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436028699] [2021-03-10 21:33:14,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110014113] [2021-03-10 21:33:14,899 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 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 21:33:14,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:33:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:14,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:15,312 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:15,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:15,313 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 37 treesize of output 252 [2021-03-10 21:33:17,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:17,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:17,532 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 21:33:17,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:17,850 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:17,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:17,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:17,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:17,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:17,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457103046] [2021-03-10 21:33:17,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:17,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:17,886 INFO L87 Difference]: Start difference. First operand 1580 states and 5014 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 21:33:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:18,940 INFO L93 Difference]: Finished difference Result 1727 states and 5323 transitions. [2021-03-10 21:33:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:33:18,941 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 19 [2021-03-10 21:33:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:18,943 INFO L225 Difference]: With dead ends: 1727 [2021-03-10 21:33:18,943 INFO L226 Difference]: Without dead ends: 1715 [2021-03-10 21:33:18,943 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:33:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-03-10 21:33:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1582. [2021-03-10 21:33:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.170777988614801) internal successors, (5013), 1581 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5013 transitions. [2021-03-10 21:33:18,959 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5013 transitions. Word has length 19 [2021-03-10 21:33:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:18,959 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5013 transitions. [2021-03-10 21:33:18,960 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 21:33:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5013 transitions. [2021-03-10 21:33:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:18,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:18,961 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:19,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25854 [2021-03-10 21:33:19,163 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:19,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:19,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2122780805, now seen corresponding path program 211 times [2021-03-10 21:33:19,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:19,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670989089] [2021-03-10 21:33:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:19,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670989089] [2021-03-10 21:33:19,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203386007] [2021-03-10 21:33:19,295 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 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 21:33:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:19,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:19,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:19,733 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:19,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:19,734 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 37 treesize of output 252 [2021-03-10 21:33:20,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:20,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:20,416 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 35 treesize of output 193 [2021-03-10 21:33:20,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:20,934 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:20,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:20,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:20,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:20,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:33:20,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888909668] [2021-03-10 21:33:20,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:33:20,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:20,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:33:20,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:20,976 INFO L87 Difference]: Start difference. First operand 1582 states and 5013 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 21:33:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:22,019 INFO L93 Difference]: Finished difference Result 1736 states and 5354 transitions. [2021-03-10 21:33:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:33:22,019 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 19 [2021-03-10 21:33:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:22,021 INFO L225 Difference]: With dead ends: 1736 [2021-03-10 21:33:22,021 INFO L226 Difference]: Without dead ends: 1726 [2021-03-10 21:33:22,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1080.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:33:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-03-10 21:33:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1580. [2021-03-10 21:33:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.1728942368587716) internal successors, (5010), 1579 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5010 transitions. [2021-03-10 21:33:22,038 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5010 transitions. Word has length 19 [2021-03-10 21:33:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:22,038 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5010 transitions. [2021-03-10 21:33:22,038 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 21:33:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5010 transitions. [2021-03-10 21:33:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:22,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:22,039 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:22,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26659 [2021-03-10 21:33:22,240 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1987737538, now seen corresponding path program 212 times [2021-03-10 21:33:22,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:22,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761171375] [2021-03-10 21:33:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:22,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761171375] [2021-03-10 21:33:22,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716085116] [2021-03-10 21:33:22,291 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 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 21:33:22,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:22,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:33:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:22,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:22,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:33:22,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659309009] [2021-03-10 21:33:22,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:22,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:22,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:22,354 INFO L87 Difference]: Start difference. First operand 1580 states and 5010 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 21:33:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:22,480 INFO L93 Difference]: Finished difference Result 2534 states and 7861 transitions. [2021-03-10 21:33:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:33:22,481 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 19 [2021-03-10 21:33:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:22,484 INFO L225 Difference]: With dead ends: 2534 [2021-03-10 21:33:22,484 INFO L226 Difference]: Without dead ends: 2534 [2021-03-10 21:33:22,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:33:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-03-10 21:33:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2248. [2021-03-10 21:33:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.2158433466844683) internal successors, (7226), 2247 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 7226 transitions. [2021-03-10 21:33:22,509 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 7226 transitions. Word has length 19 [2021-03-10 21:33:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:22,509 INFO L480 AbstractCegarLoop]: Abstraction has 2248 states and 7226 transitions. [2021-03-10 21:33:22,509 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 21:33:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 7226 transitions. [2021-03-10 21:33:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:22,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:22,511 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:22,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27110,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:22,712 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash -377496769, now seen corresponding path program 213 times [2021-03-10 21:33:22,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:22,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203911391] [2021-03-10 21:33:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:22,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203911391] [2021-03-10 21:33:22,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893390011] [2021-03-10 21:33:22,843 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 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 21:33:22,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:33:22,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:22,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:23,305 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:23,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:23,306 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 37 treesize of output 252 [2021-03-10 21:33:24,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:24,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:24,690 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 21:33:25,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:25,105 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:25,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:25,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:25,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:25,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:33:25,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664740923] [2021-03-10 21:33:25,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:33:25,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:25,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:33:25,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:25,141 INFO L87 Difference]: Start difference. First operand 2248 states and 7226 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 21:33:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:26,034 INFO L93 Difference]: Finished difference Result 2317 states and 7342 transitions. [2021-03-10 21:33:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:26,035 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 19 [2021-03-10 21:33:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:26,038 INFO L225 Difference]: With dead ends: 2317 [2021-03-10 21:33:26,038 INFO L226 Difference]: Without dead ends: 2307 [2021-03-10 21:33:26,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1037.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:33:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-03-10 21:33:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2248. [2021-03-10 21:33:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.2158433466844683) internal successors, (7226), 2247 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 7226 transitions. [2021-03-10 21:33:26,065 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 7226 transitions. Word has length 19 [2021-03-10 21:33:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:26,065 INFO L480 AbstractCegarLoop]: Abstraction has 2248 states and 7226 transitions. [2021-03-10 21:33:26,065 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 21:33:26,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 7226 transitions. [2021-03-10 21:33:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:26,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:26,067 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:26,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27111 [2021-03-10 21:33:26,267 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:26,268 INFO L82 PathProgramCache]: Analyzing trace with hash -504602600, now seen corresponding path program 214 times [2021-03-10 21:33:26,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:26,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648871730] [2021-03-10 21:33:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:26,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648871730] [2021-03-10 21:33:26,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173884770] [2021-03-10 21:33:26,321 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 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 21:33:26,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:26,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:26,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:33:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:26,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:26,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:33:26,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463276275] [2021-03-10 21:33:26,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:26,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:26,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:26,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:26,384 INFO L87 Difference]: Start difference. First operand 2248 states and 7226 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 21:33:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:26,564 INFO L93 Difference]: Finished difference Result 2505 states and 7772 transitions. [2021-03-10 21:33:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:33:26,565 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 19 [2021-03-10 21:33:26,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:26,568 INFO L225 Difference]: With dead ends: 2505 [2021-03-10 21:33:26,568 INFO L226 Difference]: Without dead ends: 2505 [2021-03-10 21:33:26,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-03-10 21:33:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2303. [2021-03-10 21:33:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 3.2132927888792353) internal successors, (7397), 2302 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 7397 transitions. [2021-03-10 21:33:26,593 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 7397 transitions. Word has length 19 [2021-03-10 21:33:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:26,593 INFO L480 AbstractCegarLoop]: Abstraction has 2303 states and 7397 transitions. [2021-03-10 21:33:26,593 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 21:33:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 7397 transitions. [2021-03-10 21:33:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:26,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:26,594 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:26,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27818,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:26,795 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2108266501, now seen corresponding path program 215 times [2021-03-10 21:33:26,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:26,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025676334] [2021-03-10 21:33:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:26,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025676334] [2021-03-10 21:33:26,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967389449] [2021-03-10 21:33:26,929 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 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 21:33:26,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:26,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:26,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:26,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:27,406 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:27,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:27,407 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 37 treesize of output 252 [2021-03-10 21:33:28,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:28,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:28,467 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 21:33:28,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:28,791 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:28,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:28,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:28,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:28,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:33:28,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975579312] [2021-03-10 21:33:28,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:33:28,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:28,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:33:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:28,829 INFO L87 Difference]: Start difference. First operand 2303 states and 7397 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 21:33:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:29,859 INFO L93 Difference]: Finished difference Result 2362 states and 7496 transitions. [2021-03-10 21:33:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:29,860 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 19 [2021-03-10 21:33:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:29,863 INFO L225 Difference]: With dead ends: 2362 [2021-03-10 21:33:29,863 INFO L226 Difference]: Without dead ends: 2352 [2021-03-10 21:33:29,863 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1138.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:33:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-03-10 21:33:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2305. [2021-03-10 21:33:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 3.2118055555555554) internal successors, (7400), 2304 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 7400 transitions. [2021-03-10 21:33:29,888 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 7400 transitions. Word has length 19 [2021-03-10 21:33:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:29,888 INFO L480 AbstractCegarLoop]: Abstraction has 2305 states and 7400 transitions. [2021-03-10 21:33:29,888 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 21:33:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 7400 transitions. [2021-03-10 21:33:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:29,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:29,889 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:30,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27819 [2021-03-10 21:33:30,090 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1772059778, now seen corresponding path program 216 times [2021-03-10 21:33:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231540985] [2021-03-10 21:33:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:30,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231540985] [2021-03-10 21:33:30,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365801610] [2021-03-10 21:33:30,166 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 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 21:33:30,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:33:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:30,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:33:30,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:30,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:30,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:33:30,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118454486] [2021-03-10 21:33:30,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:33:30,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:30,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:33:30,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:33:30,230 INFO L87 Difference]: Start difference. First operand 2305 states and 7400 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 21:33:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:30,458 INFO L93 Difference]: Finished difference Result 2562 states and 7913 transitions. [2021-03-10 21:33:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:30,459 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 19 [2021-03-10 21:33:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:30,462 INFO L225 Difference]: With dead ends: 2562 [2021-03-10 21:33:30,462 INFO L226 Difference]: Without dead ends: 2562 [2021-03-10 21:33:30,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:33:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-03-10 21:33:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2326. [2021-03-10 21:33:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 3.2098924731182796) internal successors, (7463), 2325 states have internal predecessors, (7463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 7463 transitions. [2021-03-10 21:33:30,490 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 7463 transitions. Word has length 19 [2021-03-10 21:33:30,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:30,490 INFO L480 AbstractCegarLoop]: Abstraction has 2326 states and 7463 transitions. [2021-03-10 21:33:30,490 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 21:33:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 7463 transitions. [2021-03-10 21:33:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:30,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:30,492 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:30,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28336,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:30,692 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1053335259, now seen corresponding path program 217 times [2021-03-10 21:33:30,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:30,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492320032] [2021-03-10 21:33:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:30,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492320032] [2021-03-10 21:33:30,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778420839] [2021-03-10 21:33:30,823 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 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 21:33:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:30,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:31,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:31,190 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 21:33:31,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:31,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:31,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:31,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:33:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:31,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:31,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:31,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957278278] [2021-03-10 21:33:31,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:31,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:31,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:31,490 INFO L87 Difference]: Start difference. First operand 2326 states and 7463 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 21:33:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:32,080 INFO L93 Difference]: Finished difference Result 2367 states and 7538 transitions. [2021-03-10 21:33:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:32,081 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 19 [2021-03-10 21:33:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:32,084 INFO L225 Difference]: With dead ends: 2367 [2021-03-10 21:33:32,084 INFO L226 Difference]: Without dead ends: 2352 [2021-03-10 21:33:32,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-03-10 21:33:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2329. [2021-03-10 21:33:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.2083333333333335) internal successors, (7469), 2328 states have internal predecessors, (7469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7469 transitions. [2021-03-10 21:33:32,108 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7469 transitions. Word has length 19 [2021-03-10 21:33:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:32,108 INFO L480 AbstractCegarLoop]: Abstraction has 2329 states and 7469 transitions. [2021-03-10 21:33:32,108 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 21:33:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7469 transitions. [2021-03-10 21:33:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:32,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:32,110 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:32,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28337 [2021-03-10 21:33:32,310 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash -201001835, now seen corresponding path program 218 times [2021-03-10 21:33:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:32,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108635119] [2021-03-10 21:33:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:32,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108635119] [2021-03-10 21:33:32,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505596398] [2021-03-10 21:33:32,448 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 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 21:33:32,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:32,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:32,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:32,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:32,819 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 21:33:33,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:33,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:33,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:33,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:33:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:33,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:33,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:33,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362848859] [2021-03-10 21:33:33,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:33,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:33,618 INFO L87 Difference]: Start difference. First operand 2329 states and 7469 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 21:33:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:34,186 INFO L93 Difference]: Finished difference Result 2368 states and 7549 transitions. [2021-03-10 21:33:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:33:34,187 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 19 [2021-03-10 21:33:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:34,189 INFO L225 Difference]: With dead ends: 2368 [2021-03-10 21:33:34,189 INFO L226 Difference]: Without dead ends: 2359 [2021-03-10 21:33:34,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-03-10 21:33:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2332. [2021-03-10 21:33:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 3.208065208065208) internal successors, (7478), 2331 states have internal predecessors, (7478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 7478 transitions. [2021-03-10 21:33:34,214 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 7478 transitions. Word has length 19 [2021-03-10 21:33:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:34,214 INFO L480 AbstractCegarLoop]: Abstraction has 2332 states and 7478 transitions. [2021-03-10 21:33:34,214 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 21:33:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 7478 transitions. [2021-03-10 21:33:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:34,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:34,216 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:34,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28473,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:34,416 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash 542581525, now seen corresponding path program 219 times [2021-03-10 21:33:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:34,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351783234] [2021-03-10 21:33:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:34,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351783234] [2021-03-10 21:33:34,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466362039] [2021-03-10 21:33:34,543 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 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 21:33:34,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:34,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:34,984 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:34,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:34,985 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 37 treesize of output 252 [2021-03-10 21:33:35,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:35,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:35,988 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 21:33:36,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:36,271 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:36,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:36,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:36,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:36,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:36,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761457272] [2021-03-10 21:33:36,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:36,309 INFO L87 Difference]: Start difference. First operand 2332 states and 7478 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 21:33:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:36,905 INFO L93 Difference]: Finished difference Result 2450 states and 7759 transitions. [2021-03-10 21:33:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:33:36,905 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 19 [2021-03-10 21:33:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:36,908 INFO L225 Difference]: With dead ends: 2450 [2021-03-10 21:33:36,908 INFO L226 Difference]: Without dead ends: 2440 [2021-03-10 21:33:36,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:33:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-03-10 21:33:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2330. [2021-03-10 21:33:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-03-10 21:33:36,933 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-03-10 21:33:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:36,933 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-03-10 21:33:36,933 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 21:33:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-03-10 21:33:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:36,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:36,935 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:37,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28862,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:37,135 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:37,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:37,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320577, now seen corresponding path program 220 times [2021-03-10 21:33:37,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:37,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649431660] [2021-03-10 21:33:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:37,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649431660] [2021-03-10 21:33:37,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870494290] [2021-03-10 21:33:37,294 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 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 21:33:37,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:37,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:37,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:37,741 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:37,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:37,741 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 37 treesize of output 252 [2021-03-10 21:33:38,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:38,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:38,783 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 21:33:39,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:39,035 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:39,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:39,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:39,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:39,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:33:39,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047995719] [2021-03-10 21:33:39,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:33:39,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:33:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:39,070 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 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 21:33:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:40,152 INFO L93 Difference]: Finished difference Result 2446 states and 7756 transitions. [2021-03-10 21:33:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:33:40,153 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 19 [2021-03-10 21:33:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:40,156 INFO L225 Difference]: With dead ends: 2446 [2021-03-10 21:33:40,156 INFO L226 Difference]: Without dead ends: 2436 [2021-03-10 21:33:40,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1160.5ms TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:33:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-03-10 21:33:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2330. [2021-03-10 21:33:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-03-10 21:33:40,180 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-03-10 21:33:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:40,181 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-03-10 21:33:40,181 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 21:33:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-03-10 21:33:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:40,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:40,182 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:40,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29303,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:40,383 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2136787431, now seen corresponding path program 221 times [2021-03-10 21:33:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:40,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686887737] [2021-03-10 21:33:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:40,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686887737] [2021-03-10 21:33:40,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712102850] [2021-03-10 21:33:40,513 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 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 21:33:40,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:33:40,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:40,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:40,964 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:40,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:40,965 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 37 treesize of output 252 [2021-03-10 21:33:41,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:41,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:41,676 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 21:33:42,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:42,081 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:42,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:42,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:42,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:42,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:33:42,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749170365] [2021-03-10 21:33:42,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:33:42,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:33:42,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:42,119 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 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 21:33:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:43,295 INFO L93 Difference]: Finished difference Result 2430 states and 7674 transitions. [2021-03-10 21:33:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:33:43,295 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 19 [2021-03-10 21:33:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:43,298 INFO L225 Difference]: With dead ends: 2430 [2021-03-10 21:33:43,298 INFO L226 Difference]: Without dead ends: 2420 [2021-03-10 21:33:43,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1246.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:33:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-03-10 21:33:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2330. [2021-03-10 21:33:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-03-10 21:33:43,325 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-03-10 21:33:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:43,325 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-03-10 21:33:43,325 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 21:33:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-03-10 21:33:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:43,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:43,326 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:43,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29783,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:43,527 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash 427410133, now seen corresponding path program 222 times [2021-03-10 21:33:43,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:43,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638355819] [2021-03-10 21:33:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638355819] [2021-03-10 21:33:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669583742] [2021-03-10 21:33:43,665 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 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 21:33:43,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:33:43,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:43,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:44,144 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:44,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:44,144 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 37 treesize of output 252 [2021-03-10 21:33:46,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:46,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:46,117 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 21:33:46,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:46,373 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:46,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:46,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:46,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:46,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:33:46,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540953864] [2021-03-10 21:33:46,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:33:46,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:33:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:33:46,411 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 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 21:33:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:47,515 INFO L93 Difference]: Finished difference Result 2388 states and 7571 transitions. [2021-03-10 21:33:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:33:47,516 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 19 [2021-03-10 21:33:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:47,519 INFO L225 Difference]: With dead ends: 2388 [2021-03-10 21:33:47,519 INFO L226 Difference]: Without dead ends: 2378 [2021-03-10 21:33:47,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1215.1ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:33:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-03-10 21:33:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2330. [2021-03-10 21:33:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-03-10 21:33:47,543 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-03-10 21:33:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:47,543 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-03-10 21:33:47,543 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 21:33:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-03-10 21:33:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:47,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:47,545 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:47,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30240 [2021-03-10 21:33:47,746 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:47,746 INFO L82 PathProgramCache]: Analyzing trace with hash -906777413, now seen corresponding path program 223 times [2021-03-10 21:33:47,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:47,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812622576] [2021-03-10 21:33:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:47,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812622576] [2021-03-10 21:33:47,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095631914] [2021-03-10 21:33:47,896 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 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 21:33:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:47,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:48,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:48,250 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 21:33:48,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:48,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:48,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:48,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:33:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:48,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:48,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:48,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937616259] [2021-03-10 21:33:48,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:48,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:48,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:48,589 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 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 21:33:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:49,156 INFO L93 Difference]: Finished difference Result 2366 states and 7547 transitions. [2021-03-10 21:33:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:33:49,157 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 19 [2021-03-10 21:33:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:49,160 INFO L225 Difference]: With dead ends: 2366 [2021-03-10 21:33:49,160 INFO L226 Difference]: Without dead ends: 2357 [2021-03-10 21:33:49,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 392.4ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-03-10 21:33:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2331. [2021-03-10 21:33:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.2085836909871244) internal successors, (7476), 2330 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 21:33:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7476 transitions. [2021-03-10 21:33:49,186 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7476 transitions. Word has length 19 [2021-03-10 21:33:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:49,186 INFO L480 AbstractCegarLoop]: Abstraction has 2331 states and 7476 transitions. [2021-03-10 21:33:49,187 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 21:33:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7476 transitions. [2021-03-10 21:33:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:49,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:49,188 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:49,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31015 [2021-03-10 21:33:49,389 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -163194053, now seen corresponding path program 224 times [2021-03-10 21:33:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:49,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323251759] [2021-03-10 21:33:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:49,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323251759] [2021-03-10 21:33:49,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106831171] [2021-03-10 21:33:49,545 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 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 21:33:49,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:49,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:49,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:49,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:49,926 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:49,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:49,926 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 37 treesize of output 252 [2021-03-10 21:33:51,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:51,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:51,274 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 21:33:51,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:51,585 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:51,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:51,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:51,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:51,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:51,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717170028] [2021-03-10 21:33:51,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:51,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:51,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:51,625 INFO L87 Difference]: Start difference. First operand 2331 states and 7476 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 21:33:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:52,716 INFO L93 Difference]: Finished difference Result 2505 states and 7913 transitions. [2021-03-10 21:33:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:33:52,716 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 19 [2021-03-10 21:33:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:52,719 INFO L225 Difference]: With dead ends: 2505 [2021-03-10 21:33:52,719 INFO L226 Difference]: Without dead ends: 2495 [2021-03-10 21:33:52,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 674.5ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:33:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-03-10 21:33:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2330. [2021-03-10 21:33:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-03-10 21:33:52,745 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-03-10 21:33:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:52,745 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-03-10 21:33:52,745 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 21:33:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-03-10 21:33:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:52,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:52,747 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:52,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31171 [2021-03-10 21:33:52,948 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash 687950079, now seen corresponding path program 225 times [2021-03-10 21:33:52,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:52,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992266896] [2021-03-10 21:33:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:53,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992266896] [2021-03-10 21:33:53,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628803011] [2021-03-10 21:33:53,073 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 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 21:33:53,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:53,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:53,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:53,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:53,460 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:53,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:53,461 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 37 treesize of output 252 [2021-03-10 21:33:54,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:54,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:54,387 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 21:33:54,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:54,624 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:33:54,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:54,625 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:54,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:54,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:54,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082911589] [2021-03-10 21:33:54,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:54,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:54,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:54,660 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 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 21:33:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:55,857 INFO L93 Difference]: Finished difference Result 2623 states and 8211 transitions. [2021-03-10 21:33:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:33:55,857 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 19 [2021-03-10 21:33:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:55,860 INFO L225 Difference]: With dead ends: 2623 [2021-03-10 21:33:55,860 INFO L226 Difference]: Without dead ends: 2613 [2021-03-10 21:33:55,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 987.8ms TimeCoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:33:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-03-10 21:33:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2180. [2021-03-10 21:33:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.199632859109683) internal successors, (6972), 2179 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 6972 transitions. [2021-03-10 21:33:55,885 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 6972 transitions. Word has length 19 [2021-03-10 21:33:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:55,885 INFO L480 AbstractCegarLoop]: Abstraction has 2180 states and 6972 transitions. [2021-03-10 21:33:55,885 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 21:33:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 6972 transitions. [2021-03-10 21:33:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:55,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:55,887 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:56,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31805,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:56,091 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:56,091 INFO L82 PathProgramCache]: Analyzing trace with hash 26686296, now seen corresponding path program 226 times [2021-03-10 21:33:56,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:56,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018528984] [2021-03-10 21:33:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:56,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018528984] [2021-03-10 21:33:56,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64611925] [2021-03-10 21:33:56,135 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 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 21:33:56,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:33:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:56,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:56,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:33:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076437957] [2021-03-10 21:33:56,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:33:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:56,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:33:56,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:33:56,194 INFO L87 Difference]: Start difference. First operand 2180 states and 6972 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 21:33:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:56,301 INFO L93 Difference]: Finished difference Result 2849 states and 8739 transitions. [2021-03-10 21:33:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:33:56,302 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 19 [2021-03-10 21:33:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:56,305 INFO L225 Difference]: With dead ends: 2849 [2021-03-10 21:33:56,305 INFO L226 Difference]: Without dead ends: 2849 [2021-03-10 21:33:56,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-03-10 21:33:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2607. [2021-03-10 21:33:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 3.2033768227168076) internal successors, (8348), 2606 states have internal predecessors, (8348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 8348 transitions. [2021-03-10 21:33:56,334 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 8348 transitions. Word has length 19 [2021-03-10 21:33:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:56,334 INFO L480 AbstractCegarLoop]: Abstraction has 2607 states and 8348 transitions. [2021-03-10 21:33:56,334 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 21:33:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 8348 transitions. [2021-03-10 21:33:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:33:56,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:56,336 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:56,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32303 [2021-03-10 21:33:56,537 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1303614395, now seen corresponding path program 227 times [2021-03-10 21:33:56,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:56,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365959180] [2021-03-10 21:33:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:56,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365959180] [2021-03-10 21:33:56,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937427949] [2021-03-10 21:33:56,657 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 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 21:33:56,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:33:56,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:56,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:33:56,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:57,069 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:57,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:57,069 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 37 treesize of output 252 [2021-03-10 21:33:59,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:33:59,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:59,109 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 21:33:59,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:59,373 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-03-10 21:33:59,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:59,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:33:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:59,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:59,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:33:59,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23391537] [2021-03-10 21:33:59,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:33:59,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:33:59,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:33:59,415 INFO L87 Difference]: Start difference. First operand 2607 states and 8348 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 21:34:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:01,187 INFO L93 Difference]: Finished difference Result 2992 states and 9322 transitions. [2021-03-10 21:34:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:34:01,187 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 19 [2021-03-10 21:34:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:01,191 INFO L225 Difference]: With dead ends: 2992 [2021-03-10 21:34:01,191 INFO L226 Difference]: Without dead ends: 2982 [2021-03-10 21:34:01,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:34:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-03-10 21:34:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2558. [2021-03-10 21:34:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2557 states have (on average 3.200234649980446) internal successors, (8183), 2557 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 8183 transitions. [2021-03-10 21:34:01,222 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 8183 transitions. Word has length 19 [2021-03-10 21:34:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:01,222 INFO L480 AbstractCegarLoop]: Abstraction has 2558 states and 8183 transitions. [2021-03-10 21:34:01,222 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 21:34:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 8183 transitions. [2021-03-10 21:34:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:01,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:01,224 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:01,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32304 [2021-03-10 21:34:01,424 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:01,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:01,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2034173506, now seen corresponding path program 228 times [2021-03-10 21:34:01,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:01,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794569792] [2021-03-10 21:34:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:01,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794569792] [2021-03-10 21:34:01,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597751493] [2021-03-10 21:34:01,470 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 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 21:34:01,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:34:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:34:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:01,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:01,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:34:01,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005741801] [2021-03-10 21:34:01,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:01,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:01,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:01,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:01,537 INFO L87 Difference]: Start difference. First operand 2558 states and 8183 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 21:34:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:01,658 INFO L93 Difference]: Finished difference Result 2820 states and 8597 transitions. [2021-03-10 21:34:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:34:01,659 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 19 [2021-03-10 21:34:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:01,662 INFO L225 Difference]: With dead ends: 2820 [2021-03-10 21:34:01,662 INFO L226 Difference]: Without dead ends: 2820 [2021-03-10 21:34:01,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-03-10 21:34:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2334. [2021-03-10 21:34:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.1795970852978996) internal successors, (7418), 2333 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7418 transitions. [2021-03-10 21:34:01,691 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7418 transitions. Word has length 19 [2021-03-10 21:34:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:01,691 INFO L480 AbstractCegarLoop]: Abstraction has 2334 states and 7418 transitions. [2021-03-10 21:34:01,691 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 21:34:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7418 transitions. [2021-03-10 21:34:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:01,693 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:01,693 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:01,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32945,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:01,893 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1085628289, now seen corresponding path program 229 times [2021-03-10 21:34:01,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:01,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053452255] [2021-03-10 21:34:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053452255] [2021-03-10 21:34:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713309087] [2021-03-10 21:34:02,012 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 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 21:34:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:02,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:34:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:02,434 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:02,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:02,435 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 37 treesize of output 252 [2021-03-10 21:34:03,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:34:03,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:03,481 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 21:34:03,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:03,852 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:34:03,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:03,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:34:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:03,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:03,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:03,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674325617] [2021-03-10 21:34:03,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:03,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:03,888 INFO L87 Difference]: Start difference. First operand 2334 states and 7418 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 21:34:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:05,326 INFO L93 Difference]: Finished difference Result 2691 states and 8335 transitions. [2021-03-10 21:34:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:34:05,326 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 19 [2021-03-10 21:34:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:05,329 INFO L225 Difference]: With dead ends: 2691 [2021-03-10 21:34:05,329 INFO L226 Difference]: Without dead ends: 2679 [2021-03-10 21:34:05,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1303.2ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:34:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-03-10 21:34:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2412. [2021-03-10 21:34:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 3.1824968892575694) internal successors, (7673), 2411 states have internal predecessors, (7673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 7673 transitions. [2021-03-10 21:34:05,355 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 7673 transitions. Word has length 19 [2021-03-10 21:34:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:05,355 INFO L480 AbstractCegarLoop]: Abstraction has 2412 states and 7673 transitions. [2021-03-10 21:34:05,355 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 21:34:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 7673 transitions. [2021-03-10 21:34:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:05,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:05,357 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:05,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32946,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:05,557 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1496317928, now seen corresponding path program 230 times [2021-03-10 21:34:05,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:05,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032623649] [2021-03-10 21:34:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:05,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032623649] [2021-03-10 21:34:05,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000900481] [2021-03-10 21:34:05,603 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 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 21:34:05,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:05,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:05,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:34:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:05,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:05,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:34:05,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503386800] [2021-03-10 21:34:05,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:05,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:05,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:05,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:05,669 INFO L87 Difference]: Start difference. First operand 2412 states and 7673 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 21:34:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:05,787 INFO L93 Difference]: Finished difference Result 3024 states and 9353 transitions. [2021-03-10 21:34:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:34:05,788 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 19 [2021-03-10 21:34:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:05,791 INFO L225 Difference]: With dead ends: 3024 [2021-03-10 21:34:05,791 INFO L226 Difference]: Without dead ends: 3024 [2021-03-10 21:34:05,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-03-10 21:34:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2816. [2021-03-10 21:34:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 3.183303730017762) internal successors, (8961), 2815 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 8961 transitions. [2021-03-10 21:34:05,823 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 8961 transitions. Word has length 19 [2021-03-10 21:34:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:05,823 INFO L480 AbstractCegarLoop]: Abstraction has 2816 states and 8961 transitions. [2021-03-10 21:34:05,823 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 21:34:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 8961 transitions. [2021-03-10 21:34:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:05,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:05,825 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:06,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33435 [2021-03-10 21:34:06,026 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:06,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:06,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2137707461, now seen corresponding path program 231 times [2021-03-10 21:34:06,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:06,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078779575] [2021-03-10 21:34:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078779575] [2021-03-10 21:34:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538392253] [2021-03-10 21:34:06,145 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 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 21:34:06,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:34:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:06,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:34:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:06,588 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:06,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:06,588 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 37 treesize of output 252 [2021-03-10 21:34:06,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:34:07,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:07,042 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 21:34:07,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:07,233 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:34:07,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:07,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:34:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:07,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:07,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:07,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856826830] [2021-03-10 21:34:07,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:07,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:07,271 INFO L87 Difference]: Start difference. First operand 2816 states and 8961 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 21:34:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:08,636 INFO L93 Difference]: Finished difference Result 2958 states and 9248 transitions. [2021-03-10 21:34:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:34:08,637 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 19 [2021-03-10 21:34:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:08,640 INFO L225 Difference]: With dead ends: 2958 [2021-03-10 21:34:08,640 INFO L226 Difference]: Without dead ends: 2948 [2021-03-10 21:34:08,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1301.8ms TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:34:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2021-03-10 21:34:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2818. [2021-03-10 21:34:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2817 states have (on average 3.182108626198083) internal successors, (8964), 2817 states have internal predecessors, (8964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 8964 transitions. [2021-03-10 21:34:08,672 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 8964 transitions. Word has length 19 [2021-03-10 21:34:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:08,672 INFO L480 AbstractCegarLoop]: Abstraction has 2818 states and 8964 transitions. [2021-03-10 21:34:08,672 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 21:34:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 8964 transitions. [2021-03-10 21:34:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:08,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:08,674 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:08,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33436 [2021-03-10 21:34:08,875 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:08,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2002664194, now seen corresponding path program 232 times [2021-03-10 21:34:08,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:08,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141493724] [2021-03-10 21:34:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141493724] [2021-03-10 21:34:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76344547] [2021-03-10 21:34:08,923 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 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 21:34:08,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:34:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:08,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:08,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:34:08,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012621320] [2021-03-10 21:34:08,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:08,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:08,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:08,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:08,989 INFO L87 Difference]: Start difference. First operand 2818 states and 8964 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 21:34:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:09,097 INFO L93 Difference]: Finished difference Result 3066 states and 9599 transitions. [2021-03-10 21:34:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:34:09,097 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 19 [2021-03-10 21:34:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:09,100 INFO L225 Difference]: With dead ends: 3066 [2021-03-10 21:34:09,101 INFO L226 Difference]: Without dead ends: 3066 [2021-03-10 21:34:09,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:34:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-03-10 21:34:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2960. [2021-03-10 21:34:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 3.175397093612707) internal successors, (9396), 2959 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 9396 transitions. [2021-03-10 21:34:09,134 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 9396 transitions. Word has length 19 [2021-03-10 21:34:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:09,134 INFO L480 AbstractCegarLoop]: Abstraction has 2960 states and 9396 transitions. [2021-03-10 21:34:09,134 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 21:34:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 9396 transitions. [2021-03-10 21:34:09,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:09,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:09,137 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:09,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33693,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:09,337 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash -392423425, now seen corresponding path program 233 times [2021-03-10 21:34:09,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:09,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032668505] [2021-03-10 21:34:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:09,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032668505] [2021-03-10 21:34:09,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265918149] [2021-03-10 21:34:09,473 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 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 21:34:09,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:34:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:09,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:34:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:09,943 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:09,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:09,944 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 37 treesize of output 252 [2021-03-10 21:34:10,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:34:10,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:10,489 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 21:34:10,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:10,832 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:34:10,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:10,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:34:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:10,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:10,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:34:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634494680] [2021-03-10 21:34:10,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:34:10,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:34:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:34:10,870 INFO L87 Difference]: Start difference. First operand 2960 states and 9396 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 21:34:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:12,148 INFO L93 Difference]: Finished difference Result 3108 states and 9699 transitions. [2021-03-10 21:34:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:34:12,148 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 19 [2021-03-10 21:34:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:12,152 INFO L225 Difference]: With dead ends: 3108 [2021-03-10 21:34:12,152 INFO L226 Difference]: Without dead ends: 3098 [2021-03-10 21:34:12,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1328.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:34:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-03-10 21:34:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2956. [2021-03-10 21:34:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.1776649746192893) internal successors, (9390), 2955 states have internal predecessors, (9390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9390 transitions. [2021-03-10 21:34:12,186 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9390 transitions. Word has length 19 [2021-03-10 21:34:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:12,186 INFO L480 AbstractCegarLoop]: Abstraction has 2956 states and 9390 transitions. [2021-03-10 21:34:12,186 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 21:34:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9390 transitions. [2021-03-10 21:34:12,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:12,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:12,188 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:12,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33694,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:12,388 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash -519529256, now seen corresponding path program 234 times [2021-03-10 21:34:12,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:12,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398114562] [2021-03-10 21:34:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398114562] [2021-03-10 21:34:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367164029] [2021-03-10 21:34:12,459 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 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 21:34:12,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:34:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:34:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:12,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:12,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:34:12,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811764002] [2021-03-10 21:34:12,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:12,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:12,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:12,538 INFO L87 Difference]: Start difference. First operand 2956 states and 9390 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 21:34:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:12,697 INFO L93 Difference]: Finished difference Result 3117 states and 9716 transitions. [2021-03-10 21:34:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:34:12,697 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 19 [2021-03-10 21:34:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:12,701 INFO L225 Difference]: With dead ends: 3117 [2021-03-10 21:34:12,701 INFO L226 Difference]: Without dead ends: 3117 [2021-03-10 21:34:12,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:34:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-03-10 21:34:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2981. [2021-03-10 21:34:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 3.1761744966442955) internal successors, (9465), 2980 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 9465 transitions. [2021-03-10 21:34:12,732 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 9465 transitions. Word has length 19 [2021-03-10 21:34:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:12,732 INFO L480 AbstractCegarLoop]: Abstraction has 2981 states and 9465 transitions. [2021-03-10 21:34:12,732 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 21:34:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 9465 transitions. [2021-03-10 21:34:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:12,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:12,734 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:12,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34049 [2021-03-10 21:34:12,935 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2123193157, now seen corresponding path program 235 times [2021-03-10 21:34:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:12,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833491250] [2021-03-10 21:34:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:13,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833491250] [2021-03-10 21:34:13,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487381363] [2021-03-10 21:34:13,085 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 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 21:34:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:13,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:34:13,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:13,570 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:13,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:13,570 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 37 treesize of output 252 [2021-03-10 21:34:14,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:34:14,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:14,129 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 21:34:14,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:14,455 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:34:14,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:14,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:34:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:14,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:14,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:34:14,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414798081] [2021-03-10 21:34:14,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:34:14,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:34:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:34:14,493 INFO L87 Difference]: Start difference. First operand 2981 states and 9465 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 21:34:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:15,656 INFO L93 Difference]: Finished difference Result 3061 states and 9606 transitions. [2021-03-10 21:34:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:34:15,657 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 19 [2021-03-10 21:34:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:15,661 INFO L225 Difference]: With dead ends: 3061 [2021-03-10 21:34:15,661 INFO L226 Difference]: Without dead ends: 3051 [2021-03-10 21:34:15,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1288.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:34:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-03-10 21:34:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2981. [2021-03-10 21:34:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 3.1761744966442955) internal successors, (9465), 2980 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 9465 transitions. [2021-03-10 21:34:15,697 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 9465 transitions. Word has length 19 [2021-03-10 21:34:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:15,697 INFO L480 AbstractCegarLoop]: Abstraction has 2981 states and 9465 transitions. [2021-03-10 21:34:15,697 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 21:34:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 9465 transitions. [2021-03-10 21:34:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:15,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:15,699 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:15,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34050,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:15,900 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:15,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986434, now seen corresponding path program 236 times [2021-03-10 21:34:15,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:15,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137782840] [2021-03-10 21:34:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:15,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137782840] [2021-03-10 21:34:15,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141797869] [2021-03-10 21:34:15,961 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 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 21:34:15,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:15,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:34:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:16,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:16,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:34:16,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919265247] [2021-03-10 21:34:16,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:16,029 INFO L87 Difference]: Start difference. First operand 2981 states and 9465 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 21:34:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:16,235 INFO L93 Difference]: Finished difference Result 3192 states and 9909 transitions. [2021-03-10 21:34:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:34:16,236 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 19 [2021-03-10 21:34:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:16,239 INFO L225 Difference]: With dead ends: 3192 [2021-03-10 21:34:16,239 INFO L226 Difference]: Without dead ends: 3192 [2021-03-10 21:34:16,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:34:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2021-03-10 21:34:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3020. [2021-03-10 21:34:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 3.1738986419344153) internal successors, (9582), 3019 states have internal predecessors, (9582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 9582 transitions. [2021-03-10 21:34:16,276 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 9582 transitions. Word has length 19 [2021-03-10 21:34:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:16,276 INFO L480 AbstractCegarLoop]: Abstraction has 3020 states and 9582 transitions. [2021-03-10 21:34:16,276 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 21:34:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 9582 transitions. [2021-03-10 21:34:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:16,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:16,279 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:16,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34421 [2021-03-10 21:34:16,484 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash 57519999, now seen corresponding path program 237 times [2021-03-10 21:34:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:16,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016987941] [2021-03-10 21:34:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:16,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016987941] [2021-03-10 21:34:16,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776877078] [2021-03-10 21:34:16,625 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 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 21:34:16,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:34:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:16,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 21:34:16,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:17,135 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:17,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:17,135 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 37 treesize of output 252 [2021-03-10 21:34:17,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:34:17,844 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 21:34:17,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:17,845 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 21:34:18,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:18,214 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:34:18,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:18,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-03-10 21:34:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:18,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:18,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:34:18,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015567255] [2021-03-10 21:34:18,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:34:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:34:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:34:18,253 INFO L87 Difference]: Start difference. First operand 3020 states and 9582 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 21:34:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:19,474 INFO L93 Difference]: Finished difference Result 3081 states and 9687 transitions. [2021-03-10 21:34:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:34:19,475 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 19 [2021-03-10 21:34:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:19,478 INFO L225 Difference]: With dead ends: 3081 [2021-03-10 21:34:19,479 INFO L226 Difference]: Without dead ends: 3071 [2021-03-10 21:34:19,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1367.7ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:34:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-03-10 21:34:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3022. [2021-03-10 21:34:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 3021 states have (on average 3.17279046673287) internal successors, (9585), 3021 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 9585 transitions. [2021-03-10 21:34:19,514 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 9585 transitions. Word has length 19 [2021-03-10 21:34:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:19,514 INFO L480 AbstractCegarLoop]: Abstraction has 3022 states and 9585 transitions. [2021-03-10 21:34:19,514 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 21:34:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 9585 transitions. [2021-03-10 21:34:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:34:19,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:19,516 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:19,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34422,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:19,717 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1871514008, now seen corresponding path program 238 times [2021-03-10 21:34:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:19,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028439177] [2021-03-10 21:34:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:19,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028439177] [2021-03-10 21:34:19,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640362526] [2021-03-10 21:34:19,780 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 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 21:34:19,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:19,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:34:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:19,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:19,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:34:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853080180] [2021-03-10 21:34:19,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:19,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:19,846 INFO L87 Difference]: Start difference. First operand 3022 states and 9585 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 21:34:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:20,069 INFO L93 Difference]: Finished difference Result 3333 states and 10281 transitions. [2021-03-10 21:34:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:34:20,069 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 19 [2021-03-10 21:34:20,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:20,073 INFO L225 Difference]: With dead ends: 3333 [2021-03-10 21:34:20,073 INFO L226 Difference]: Without dead ends: 3333 [2021-03-10 21:34:20,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-03-10 21:34:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3036. [2021-03-10 21:34:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 3035 states have (on average 3.171993410214168) internal successors, (9627), 3035 states have internal predecessors, (9627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 9627 transitions. [2021-03-10 21:34:20,105 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 9627 transitions. Word has length 19 [2021-03-10 21:34:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:20,105 INFO L480 AbstractCegarLoop]: Abstraction has 3036 states and 9627 transitions. [2021-03-10 21:34:20,105 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 21:34:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 9627 transitions. [2021-03-10 21:34:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:20,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:20,107 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:20,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34793,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:20,311 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1968008967, now seen corresponding path program 239 times [2021-03-10 21:34:20,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:20,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345723332] [2021-03-10 21:34:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345723332] [2021-03-10 21:34:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297040219] [2021-03-10 21:34:20,442 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 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 21:34:20,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:34:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:20,891 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:20,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:20,891 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 21:34:21,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:21,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:21,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:21,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:21,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:21,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:34:21,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145566730] [2021-03-10 21:34:21,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:34:21,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:21,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:34:21,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:34:21,721 INFO L87 Difference]: Start difference. First operand 3036 states and 9627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:22,392 INFO L93 Difference]: Finished difference Result 3128 states and 9840 transitions. [2021-03-10 21:34:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:34:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:34:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:22,396 INFO L225 Difference]: With dead ends: 3128 [2021-03-10 21:34:22,396 INFO L226 Difference]: Without dead ends: 3117 [2021-03-10 21:34:22,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-03-10 21:34:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 3059. [2021-03-10 21:34:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.171353826030085) internal successors, (9698), 3058 states have internal predecessors, (9698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 9698 transitions. [2021-03-10 21:34:22,429 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 9698 transitions. Word has length 20 [2021-03-10 21:34:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:22,429 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 9698 transitions. [2021-03-10 21:34:22,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:22,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 9698 transitions. [2021-03-10 21:34:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:22,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:22,431 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:22,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34794,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:22,631 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash -750369269, now seen corresponding path program 240 times [2021-03-10 21:34:22,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:22,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502026135] [2021-03-10 21:34:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:22,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502026135] [2021-03-10 21:34:22,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098835600] [2021-03-10 21:34:22,746 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 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 21:34:22,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:34:22,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:23,168 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:23,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:23,168 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 21:34:23,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:23,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:23,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:23,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:23,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:23,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989976706] [2021-03-10 21:34:23,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:23,917 INFO L87 Difference]: Start difference. First operand 3059 states and 9698 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 21:34:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:24,558 INFO L93 Difference]: Finished difference Result 3147 states and 9873 transitions. [2021-03-10 21:34:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:34:24,558 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 21:34:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:24,562 INFO L225 Difference]: With dead ends: 3147 [2021-03-10 21:34:24,562 INFO L226 Difference]: Without dead ends: 3142 [2021-03-10 21:34:24,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:34:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-03-10 21:34:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 3059. [2021-03-10 21:34:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.171353826030085) internal successors, (9698), 3058 states have internal predecessors, (9698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 9698 transitions. [2021-03-10 21:34:24,593 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 9698 transitions. Word has length 20 [2021-03-10 21:34:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:24,593 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 9698 transitions. [2021-03-10 21:34:24,593 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 21:34:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 9698 transitions. [2021-03-10 21:34:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:24,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:24,595 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:24,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35145,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:24,795 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1411633052, now seen corresponding path program 241 times [2021-03-10 21:34:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:24,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925730025] [2021-03-10 21:34:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:24,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925730025] [2021-03-10 21:34:24,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392044061] [2021-03-10 21:34:24,850 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 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 21:34:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:24,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:24,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:34:24,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901685416] [2021-03-10 21:34:24,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:24,919 INFO L87 Difference]: Start difference. First operand 3059 states and 9698 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 21:34:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:25,000 INFO L93 Difference]: Finished difference Result 3531 states and 10726 transitions. [2021-03-10 21:34:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:34:25,001 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 21:34:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:25,006 INFO L225 Difference]: With dead ends: 3531 [2021-03-10 21:34:25,006 INFO L226 Difference]: Without dead ends: 3531 [2021-03-10 21:34:25,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-03-10 21:34:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 3090. [2021-03-10 21:34:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.17643250242797) internal successors, (9812), 3089 states have internal predecessors, (9812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 9812 transitions. [2021-03-10 21:34:25,048 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 9812 transitions. Word has length 20 [2021-03-10 21:34:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:25,048 INFO L480 AbstractCegarLoop]: Abstraction has 3090 states and 9812 transitions. [2021-03-10 21:34:25,048 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 21:34:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 9812 transitions. [2021-03-10 21:34:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:25,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:25,050 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:25,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35390 [2021-03-10 21:34:25,252 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:25,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1981379847, now seen corresponding path program 242 times [2021-03-10 21:34:25,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:25,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619174607] [2021-03-10 21:34:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:25,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619174607] [2021-03-10 21:34:25,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280866882] [2021-03-10 21:34:25,382 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 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 21:34:25,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:25,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:25,865 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:25,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:25,866 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 21:34:26,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:26,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:26,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:26,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:26,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:26,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:26,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975713234] [2021-03-10 21:34:26,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:26,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:26,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:26,756 INFO L87 Difference]: Start difference. First operand 3090 states and 9812 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:27,281 INFO L93 Difference]: Finished difference Result 3195 states and 9990 transitions. [2021-03-10 21:34:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:34:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:34:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:27,286 INFO L225 Difference]: With dead ends: 3195 [2021-03-10 21:34:27,286 INFO L226 Difference]: Without dead ends: 3186 [2021-03-10 21:34:27,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-03-10 21:34:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 3093. [2021-03-10 21:34:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.1759379042690816) internal successors, (9820), 3092 states have internal predecessors, (9820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 9820 transitions. [2021-03-10 21:34:27,320 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 9820 transitions. Word has length 20 [2021-03-10 21:34:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:27,320 INFO L480 AbstractCegarLoop]: Abstraction has 3093 states and 9820 transitions. [2021-03-10 21:34:27,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 9820 transitions. [2021-03-10 21:34:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:27,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:27,322 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:27,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35391,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:27,523 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash 853983754, now seen corresponding path program 243 times [2021-03-10 21:34:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:27,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472139830] [2021-03-10 21:34:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:27,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472139830] [2021-03-10 21:34:27,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282816748] [2021-03-10 21:34:27,578 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 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 21:34:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:34:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:27,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:27,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:34:27,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85627102] [2021-03-10 21:34:27,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:27,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:27,644 INFO L87 Difference]: Start difference. First operand 3093 states and 9820 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 21:34:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:27,749 INFO L93 Difference]: Finished difference Result 3703 states and 11215 transitions. [2021-03-10 21:34:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:34:27,749 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 21:34:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:27,754 INFO L225 Difference]: With dead ends: 3703 [2021-03-10 21:34:27,754 INFO L226 Difference]: Without dead ends: 3703 [2021-03-10 21:34:27,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:34:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3703 states. [2021-03-10 21:34:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3703 to 3093. [2021-03-10 21:34:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.1759379042690816) internal successors, (9820), 3092 states have internal predecessors, (9820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 9820 transitions. [2021-03-10 21:34:27,795 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 9820 transitions. Word has length 20 [2021-03-10 21:34:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:27,795 INFO L480 AbstractCegarLoop]: Abstraction has 3093 states and 9820 transitions. [2021-03-10 21:34:27,795 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 21:34:27,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 9820 transitions. [2021-03-10 21:34:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:27,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:27,799 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:28,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35739,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:28,003 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:28,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1336798777, now seen corresponding path program 244 times [2021-03-10 21:34:28,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:28,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936551997] [2021-03-10 21:34:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936551997] [2021-03-10 21:34:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257302012] [2021-03-10 21:34:28,123 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 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 21:34:28,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:28,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:28,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:28,539 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:28,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:28,539 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 21:34:29,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:29,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:29,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:29,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:29,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:29,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:29,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174675290] [2021-03-10 21:34:29,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:29,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:29,189 INFO L87 Difference]: Start difference. First operand 3093 states and 9820 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:29,563 INFO L93 Difference]: Finished difference Result 3179 states and 9979 transitions. [2021-03-10 21:34:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:34:29,564 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:34:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:29,568 INFO L225 Difference]: With dead ends: 3179 [2021-03-10 21:34:29,568 INFO L226 Difference]: Without dead ends: 3172 [2021-03-10 21:34:29,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-03-10 21:34:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3095. [2021-03-10 21:34:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 3.1758241758241756) internal successors, (9826), 3094 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 9826 transitions. [2021-03-10 21:34:29,605 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 9826 transitions. Word has length 20 [2021-03-10 21:34:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:29,605 INFO L480 AbstractCegarLoop]: Abstraction has 3095 states and 9826 transitions. [2021-03-10 21:34:29,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 9826 transitions. [2021-03-10 21:34:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:29,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:29,607 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:29,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35740 [2021-03-10 21:34:29,808 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1830772426, now seen corresponding path program 245 times [2021-03-10 21:34:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:29,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778656022] [2021-03-10 21:34:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:29,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778656022] [2021-03-10 21:34:29,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713519616] [2021-03-10 21:34:29,861 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 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 21:34:29,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:34:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:29,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:29,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:34:29,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203236820] [2021-03-10 21:34:29,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:29,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:29,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:29,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:29,937 INFO L87 Difference]: Start difference. First operand 3095 states and 9826 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 21:34:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:30,051 INFO L93 Difference]: Finished difference Result 3710 states and 11245 transitions. [2021-03-10 21:34:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:34:30,052 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 21:34:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:30,056 INFO L225 Difference]: With dead ends: 3710 [2021-03-10 21:34:30,056 INFO L226 Difference]: Without dead ends: 3710 [2021-03-10 21:34:30,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:34:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-03-10 21:34:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3080. [2021-03-10 21:34:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 3.1750568366352714) internal successors, (9776), 3079 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 9776 transitions. [2021-03-10 21:34:30,095 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 9776 transitions. Word has length 20 [2021-03-10 21:34:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:30,095 INFO L480 AbstractCegarLoop]: Abstraction has 3080 states and 9776 transitions. [2021-03-10 21:34:30,095 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 21:34:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 9776 transitions. [2021-03-10 21:34:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:30,097 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:30,097 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:30,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35990,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:30,297 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1926339292, now seen corresponding path program 246 times [2021-03-10 21:34:30,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:30,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171007858] [2021-03-10 21:34:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:30,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171007858] [2021-03-10 21:34:30,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670770947] [2021-03-10 21:34:30,357 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 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 21:34:30,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:34:30,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:30,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:30,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:30,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:34:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858799875] [2021-03-10 21:34:30,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:30,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:30,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:30,430 INFO L87 Difference]: Start difference. First operand 3080 states and 9776 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 21:34:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:30,567 INFO L93 Difference]: Finished difference Result 3972 states and 11947 transitions. [2021-03-10 21:34:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:34:30,568 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 21:34:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:30,572 INFO L225 Difference]: With dead ends: 3972 [2021-03-10 21:34:30,572 INFO L226 Difference]: Without dead ends: 3972 [2021-03-10 21:34:30,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-03-10 21:34:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 2953. [2021-03-10 21:34:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 3.165989159891599) internal successors, (9346), 2952 states have internal predecessors, (9346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 9346 transitions. [2021-03-10 21:34:30,610 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 9346 transitions. Word has length 20 [2021-03-10 21:34:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:30,610 INFO L480 AbstractCegarLoop]: Abstraction has 2953 states and 9346 transitions. [2021-03-10 21:34:30,610 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 21:34:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 9346 transitions. [2021-03-10 21:34:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:30,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:30,612 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:30,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35991,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:30,812 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:30,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1511860465, now seen corresponding path program 247 times [2021-03-10 21:34:30,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:30,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178988678] [2021-03-10 21:34:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:30,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178988678] [2021-03-10 21:34:30,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771548964] [2021-03-10 21:34:30,908 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 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 21:34:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:30,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:31,341 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:31,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:31,342 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 21:34:32,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:32,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:32,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:32,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:32,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:32,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:34:32,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861136298] [2021-03-10 21:34:32,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:34:32,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:32,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:34:32,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:34:32,385 INFO L87 Difference]: Start difference. First operand 2953 states and 9346 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 21:34:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:32,898 INFO L93 Difference]: Finished difference Result 3043 states and 9534 transitions. [2021-03-10 21:34:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:34:32,898 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 21:34:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:32,902 INFO L225 Difference]: With dead ends: 3043 [2021-03-10 21:34:32,902 INFO L226 Difference]: Without dead ends: 3038 [2021-03-10 21:34:32,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:34:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-03-10 21:34:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2954. [2021-03-10 21:34:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.165932949542838) internal successors, (9349), 2953 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9349 transitions. [2021-03-10 21:34:32,937 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9349 transitions. Word has length 20 [2021-03-10 21:34:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:32,938 INFO L480 AbstractCegarLoop]: Abstraction has 2954 states and 9349 transitions. [2021-03-10 21:34:32,938 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 21:34:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9349 transitions. [2021-03-10 21:34:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:32,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:32,940 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:33,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35992,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:33,143 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:33,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1121121017, now seen corresponding path program 248 times [2021-03-10 21:34:33,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:33,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401749625] [2021-03-10 21:34:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:33,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401749625] [2021-03-10 21:34:33,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913245463] [2021-03-10 21:34:33,268 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 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 21:34:33,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:33,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:33,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:33,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:33,685 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:33,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:33,686 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 21:34:34,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:34,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:34,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:34,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:34,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:34,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:34,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443283820] [2021-03-10 21:34:34,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:34,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:34,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:34,310 INFO L87 Difference]: Start difference. First operand 2954 states and 9349 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:34,678 INFO L93 Difference]: Finished difference Result 3038 states and 9501 transitions. [2021-03-10 21:34:34,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:34:34,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:34:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:34,682 INFO L225 Difference]: With dead ends: 3038 [2021-03-10 21:34:34,682 INFO L226 Difference]: Without dead ends: 3029 [2021-03-10 21:34:34,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-03-10 21:34:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2953. [2021-03-10 21:34:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 3.1646341463414633) internal successors, (9342), 2952 states have internal predecessors, (9342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 9342 transitions. [2021-03-10 21:34:34,714 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 9342 transitions. Word has length 20 [2021-03-10 21:34:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:34,714 INFO L480 AbstractCegarLoop]: Abstraction has 2953 states and 9342 transitions. [2021-03-10 21:34:34,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 9342 transitions. [2021-03-10 21:34:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:34,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:34,716 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:34,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36372 [2021-03-10 21:34:34,918 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash -187657308, now seen corresponding path program 249 times [2021-03-10 21:34:34,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:34,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411968063] [2021-03-10 21:34:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:34,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411968063] [2021-03-10 21:34:34,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347181808] [2021-03-10 21:34:34,962 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 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 21:34:34,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:34:34,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:34:35,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:35,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:34:35,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488242320] [2021-03-10 21:34:35,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:34:35,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:34:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:34:35,026 INFO L87 Difference]: Start difference. First operand 2953 states and 9342 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 21:34:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:35,093 INFO L93 Difference]: Finished difference Result 3213 states and 9806 transitions. [2021-03-10 21:34:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:34:35,094 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 21:34:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:35,098 INFO L225 Difference]: With dead ends: 3213 [2021-03-10 21:34:35,098 INFO L226 Difference]: Without dead ends: 3213 [2021-03-10 21:34:35,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-03-10 21:34:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 2975. [2021-03-10 21:34:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.1664425016812374) internal successors, (9417), 2974 states have internal predecessors, (9417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 9417 transitions. [2021-03-10 21:34:35,131 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 9417 transitions. Word has length 20 [2021-03-10 21:34:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:35,131 INFO L480 AbstractCegarLoop]: Abstraction has 2975 states and 9417 transitions. [2021-03-10 21:34:35,132 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 21:34:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 9417 transitions. [2021-03-10 21:34:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:35,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:35,133 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:35,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36632 [2021-03-10 21:34:35,334 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2046450186, now seen corresponding path program 250 times [2021-03-10 21:34:35,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:35,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193459261] [2021-03-10 21:34:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:35,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193459261] [2021-03-10 21:34:35,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964305692] [2021-03-10 21:34:35,384 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 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 21:34:35,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:35,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:35,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:35,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:35,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:34:35,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225213272] [2021-03-10 21:34:35,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:35,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:35,446 INFO L87 Difference]: Start difference. First operand 2975 states and 9417 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 21:34:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:35,537 INFO L93 Difference]: Finished difference Result 3374 states and 10226 transitions. [2021-03-10 21:34:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:34:35,538 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 21:34:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:35,542 INFO L225 Difference]: With dead ends: 3374 [2021-03-10 21:34:35,542 INFO L226 Difference]: Without dead ends: 3374 [2021-03-10 21:34:35,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:34:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-03-10 21:34:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 2957. [2021-03-10 21:34:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 3.1637347767253043) internal successors, (9352), 2956 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 9352 transitions. [2021-03-10 21:34:35,576 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 9352 transitions. Word has length 20 [2021-03-10 21:34:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:35,576 INFO L480 AbstractCegarLoop]: Abstraction has 2957 states and 9352 transitions. [2021-03-10 21:34:35,576 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 21:34:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 9352 transitions. [2021-03-10 21:34:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:35,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:35,578 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:35,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36633 [2021-03-10 21:34:35,778 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1710661532, now seen corresponding path program 251 times [2021-03-10 21:34:35,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:35,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972336961] [2021-03-10 21:34:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972336961] [2021-03-10 21:34:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954897139] [2021-03-10 21:34:35,832 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 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 21:34:35,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:34:35,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:35,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:35,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:35,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:34:35,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843083074] [2021-03-10 21:34:35,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:35,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:35,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:35,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:35,903 INFO L87 Difference]: Start difference. First operand 2957 states and 9352 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 21:34:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:36,030 INFO L93 Difference]: Finished difference Result 3737 states and 11231 transitions. [2021-03-10 21:34:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:34:36,031 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 21:34:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:36,035 INFO L225 Difference]: With dead ends: 3737 [2021-03-10 21:34:36,035 INFO L226 Difference]: Without dead ends: 3737 [2021-03-10 21:34:36,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-03-10 21:34:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 2883. [2021-03-10 21:34:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 3.1596113809854267) internal successors, (9106), 2882 states have internal predecessors, (9106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 9106 transitions. [2021-03-10 21:34:36,070 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 9106 transitions. Word has length 20 [2021-03-10 21:34:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:36,070 INFO L480 AbstractCegarLoop]: Abstraction has 2883 states and 9106 transitions. [2021-03-10 21:34:36,070 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 21:34:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 9106 transitions. [2021-03-10 21:34:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:36,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:36,072 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:36,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36634 [2021-03-10 21:34:36,272 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2077959498, now seen corresponding path program 252 times [2021-03-10 21:34:36,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:36,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170827041] [2021-03-10 21:34:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:36,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170827041] [2021-03-10 21:34:36,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500962730] [2021-03-10 21:34:36,326 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 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 21:34:36,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:34:36,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:36,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:36,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:34:36,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663830696] [2021-03-10 21:34:36,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:36,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:36,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:36,395 INFO L87 Difference]: Start difference. First operand 2883 states and 9106 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 21:34:36,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:36,586 INFO L93 Difference]: Finished difference Result 4531 states and 13821 transitions. [2021-03-10 21:34:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:34:36,587 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 21:34:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:36,594 INFO L225 Difference]: With dead ends: 4531 [2021-03-10 21:34:36,595 INFO L226 Difference]: Without dead ends: 4531 [2021-03-10 21:34:36,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:34:36,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2021-03-10 21:34:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 3652. [2021-03-10 21:34:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 3.181594083812654) internal successors, (11616), 3651 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 11616 transitions. [2021-03-10 21:34:36,644 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 11616 transitions. Word has length 20 [2021-03-10 21:34:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:36,644 INFO L480 AbstractCegarLoop]: Abstraction has 3652 states and 11616 transitions. [2021-03-10 21:34:36,644 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 21:34:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 11616 transitions. [2021-03-10 21:34:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:36,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:36,647 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:36,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36635 [2021-03-10 21:34:36,847 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2063705743, now seen corresponding path program 253 times [2021-03-10 21:34:36,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:36,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461492142] [2021-03-10 21:34:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:34:36,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461492142] [2021-03-10 21:34:36,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641243608] [2021-03-10 21:34:36,933 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 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 21:34:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:36,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:37,364 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:37,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:37,365 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 21:34:37,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:37,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:37,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:37,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:37,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:37,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 21:34:37,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668848201] [2021-03-10 21:34:37,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:34:37,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:37,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:34:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:34:37,903 INFO L87 Difference]: Start difference. First operand 3652 states and 11616 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 21:34:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:38,310 INFO L93 Difference]: Finished difference Result 3690 states and 11679 transitions. [2021-03-10 21:34:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:34:38,311 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 21:34:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:38,314 INFO L225 Difference]: With dead ends: 3690 [2021-03-10 21:34:38,314 INFO L226 Difference]: Without dead ends: 3666 [2021-03-10 21:34:38,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:34:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-03-10 21:34:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3653. [2021-03-10 21:34:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1812705366922236) internal successors, (11618), 3652 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11618 transitions. [2021-03-10 21:34:38,356 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11618 transitions. Word has length 20 [2021-03-10 21:34:38,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:38,356 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11618 transitions. [2021-03-10 21:34:38,356 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 21:34:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11618 transitions. [2021-03-10 21:34:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:38,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:38,358 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:38,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36636,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:38,559 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:38,559 INFO L82 PathProgramCache]: Analyzing trace with hash 875393611, now seen corresponding path program 254 times [2021-03-10 21:34:38,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:38,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733036140] [2021-03-10 21:34:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:38,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733036140] [2021-03-10 21:34:38,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465781870] [2021-03-10 21:34:38,653 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 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 21:34:38,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:38,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:39,084 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:39,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:39,084 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 21:34:40,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:40,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:40,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:40,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:40,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:40,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:34:40,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030134274] [2021-03-10 21:34:40,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:34:40,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:40,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:34:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:34:40,194 INFO L87 Difference]: Start difference. First operand 3653 states and 11618 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 21:34:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:40,662 INFO L93 Difference]: Finished difference Result 3764 states and 11824 transitions. [2021-03-10 21:34:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:34:40,662 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 21:34:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:40,666 INFO L225 Difference]: With dead ends: 3764 [2021-03-10 21:34:40,667 INFO L226 Difference]: Without dead ends: 3739 [2021-03-10 21:34:40,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:34:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-03-10 21:34:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3653. [2021-03-10 21:34:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1801752464403066) internal successors, (11614), 3652 states have internal predecessors, (11614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11614 transitions. [2021-03-10 21:34:40,709 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11614 transitions. Word has length 20 [2021-03-10 21:34:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:40,709 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11614 transitions. [2021-03-10 21:34:40,709 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 21:34:40,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11614 transitions. [2021-03-10 21:34:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:40,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:40,711 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:40,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36835 [2021-03-10 21:34:40,912 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1936438747, now seen corresponding path program 255 times [2021-03-10 21:34:40,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:40,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533844289] [2021-03-10 21:34:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533844289] [2021-03-10 21:34:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673354270] [2021-03-10 21:34:41,021 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 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 21:34:41,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:34:41,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:41,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:41,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:41,456 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:41,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:41,457 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 21:34:42,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:42,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:42,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:42,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:42,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:42,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:42,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922635424] [2021-03-10 21:34:42,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:42,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:42,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:42,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:42,101 INFO L87 Difference]: Start difference. First operand 3653 states and 11614 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 21:34:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:42,746 INFO L93 Difference]: Finished difference Result 3772 states and 11825 transitions. [2021-03-10 21:34:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:34:42,747 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 21:34:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:42,752 INFO L225 Difference]: With dead ends: 3772 [2021-03-10 21:34:42,752 INFO L226 Difference]: Without dead ends: 3741 [2021-03-10 21:34:42,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:34:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2021-03-10 21:34:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3653. [2021-03-10 21:34:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1755202628696604) internal successors, (11597), 3652 states have internal predecessors, (11597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11597 transitions. [2021-03-10 21:34:42,796 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11597 transitions. Word has length 20 [2021-03-10 21:34:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:42,796 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11597 transitions. [2021-03-10 21:34:42,796 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 21:34:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11597 transitions. [2021-03-10 21:34:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:42,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:42,799 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:42,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37270 [2021-03-10 21:34:42,999 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1306449377, now seen corresponding path program 256 times [2021-03-10 21:34:42,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:43,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741003847] [2021-03-10 21:34:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741003847] [2021-03-10 21:34:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985073599] [2021-03-10 21:34:43,113 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 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 21:34:43,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:43,586 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:43,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:43,586 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 21:34:44,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:44,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:44,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:44,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:44,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:44,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:44,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138800676] [2021-03-10 21:34:44,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:44,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:44,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:44,196 INFO L87 Difference]: Start difference. First operand 3653 states and 11597 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 21:34:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:44,634 INFO L93 Difference]: Finished difference Result 3822 states and 12002 transitions. [2021-03-10 21:34:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:34:44,635 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 21:34:44,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:44,639 INFO L225 Difference]: With dead ends: 3822 [2021-03-10 21:34:44,639 INFO L226 Difference]: Without dead ends: 3817 [2021-03-10 21:34:44,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-03-10 21:34:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3653. [2021-03-10 21:34:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1755202628696604) internal successors, (11597), 3652 states have internal predecessors, (11597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11597 transitions. [2021-03-10 21:34:44,680 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11597 transitions. Word has length 20 [2021-03-10 21:34:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:44,680 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11597 transitions. [2021-03-10 21:34:44,681 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 21:34:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11597 transitions. [2021-03-10 21:34:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:44,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:44,683 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:44,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37529 [2021-03-10 21:34:44,883 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1269922247, now seen corresponding path program 257 times [2021-03-10 21:34:44,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:44,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794948271] [2021-03-10 21:34:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:44,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794948271] [2021-03-10 21:34:44,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796043512] [2021-03-10 21:34:44,998 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 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 21:34:45,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:34:45,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:45,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:45,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:45,416 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:45,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:45,416 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 21:34:45,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:45,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:45,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:45,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:45,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:45,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:45,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644291196] [2021-03-10 21:34:45,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:45,873 INFO L87 Difference]: Start difference. First operand 3653 states and 11597 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:46,378 INFO L93 Difference]: Finished difference Result 3708 states and 11695 transitions. [2021-03-10 21:34:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:34:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:34:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:46,382 INFO L225 Difference]: With dead ends: 3708 [2021-03-10 21:34:46,382 INFO L226 Difference]: Without dead ends: 3699 [2021-03-10 21:34:46,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-03-10 21:34:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3649. [2021-03-10 21:34:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 3.1746162280701755) internal successors, (11581), 3648 states have internal predecessors, (11581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 11581 transitions. [2021-03-10 21:34:46,424 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 11581 transitions. Word has length 20 [2021-03-10 21:34:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:46,424 INFO L480 AbstractCegarLoop]: Abstraction has 3649 states and 11581 transitions. [2021-03-10 21:34:46,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 11581 transitions. [2021-03-10 21:34:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:46,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:46,426 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:46,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37782,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:46,627 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash 142526154, now seen corresponding path program 258 times [2021-03-10 21:34:46,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:46,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578727705] [2021-03-10 21:34:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578727705] [2021-03-10 21:34:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808235454] [2021-03-10 21:34:46,688 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 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 21:34:46,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:34:46,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:46,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:46,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:46,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:34:46,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960113619] [2021-03-10 21:34:46,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:34:46,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:46,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:34:46,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:34:46,761 INFO L87 Difference]: Start difference. First operand 3649 states and 11581 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 21:34:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:46,856 INFO L93 Difference]: Finished difference Result 3900 states and 12054 transitions. [2021-03-10 21:34:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:34:46,857 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 21:34:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:46,861 INFO L225 Difference]: With dead ends: 3900 [2021-03-10 21:34:46,861 INFO L226 Difference]: Without dead ends: 3900 [2021-03-10 21:34:46,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:34:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-03-10 21:34:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 3682. [2021-03-10 21:34:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 3.176582450421081) internal successors, (11693), 3681 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 11693 transitions. [2021-03-10 21:34:46,932 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 11693 transitions. Word has length 20 [2021-03-10 21:34:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:46,932 INFO L480 AbstractCegarLoop]: Abstraction has 3682 states and 11693 transitions. [2021-03-10 21:34:46,932 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 21:34:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 11693 transitions. [2021-03-10 21:34:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:46,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:46,934 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:47,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37978,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:47,135 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:47,136 INFO L82 PathProgramCache]: Analyzing trace with hash 680381732, now seen corresponding path program 259 times [2021-03-10 21:34:47,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:47,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000420428] [2021-03-10 21:34:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:47,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000420428] [2021-03-10 21:34:47,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255183198] [2021-03-10 21:34:47,192 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 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 21:34:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:47,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:47,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:47,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:47,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:34:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093319665] [2021-03-10 21:34:47,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:47,261 INFO L87 Difference]: Start difference. First operand 3682 states and 11693 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 21:34:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:47,421 INFO L93 Difference]: Finished difference Result 4133 states and 12675 transitions. [2021-03-10 21:34:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:34:47,422 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 21:34:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:47,429 INFO L225 Difference]: With dead ends: 4133 [2021-03-10 21:34:47,429 INFO L226 Difference]: Without dead ends: 4133 [2021-03-10 21:34:47,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-03-10 21:34:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3674. [2021-03-10 21:34:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.175605771848625) internal successors, (11664), 3673 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 11664 transitions. [2021-03-10 21:34:47,494 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 11664 transitions. Word has length 20 [2021-03-10 21:34:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:47,495 INFO L480 AbstractCegarLoop]: Abstraction has 3674 states and 11664 transitions. [2021-03-10 21:34:47,495 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 21:34:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 11664 transitions. [2021-03-10 21:34:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:47,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:47,498 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:47,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37979 [2021-03-10 21:34:47,711 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 174035466, now seen corresponding path program 260 times [2021-03-10 21:34:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:47,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214518864] [2021-03-10 21:34:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214518864] [2021-03-10 21:34:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947119707] [2021-03-10 21:34:47,770 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 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 21:34:47,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:47,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:34:47,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029199072] [2021-03-10 21:34:47,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:47,835 INFO L87 Difference]: Start difference. First operand 3674 states and 11664 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 21:34:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:48,008 INFO L93 Difference]: Finished difference Result 4497 states and 13839 transitions. [2021-03-10 21:34:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:34:48,009 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 21:34:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:48,015 INFO L225 Difference]: With dead ends: 4497 [2021-03-10 21:34:48,015 INFO L226 Difference]: Without dead ends: 4497 [2021-03-10 21:34:48,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:34:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2021-03-10 21:34:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 3805. [2021-03-10 21:34:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3804 states have (on average 3.1700841219768665) internal successors, (12059), 3804 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 12059 transitions. [2021-03-10 21:34:48,067 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 12059 transitions. Word has length 20 [2021-03-10 21:34:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:48,068 INFO L480 AbstractCegarLoop]: Abstraction has 3805 states and 12059 transitions. [2021-03-10 21:34:48,068 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 21:34:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 12059 transitions. [2021-03-10 21:34:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:48,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:48,070 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:48,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37980,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:48,271 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1657170404, now seen corresponding path program 261 times [2021-03-10 21:34:48,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:48,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781765091] [2021-03-10 21:34:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:48,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781765091] [2021-03-10 21:34:48,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97135549] [2021-03-10 21:34:48,331 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 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 21:34:48,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:34:48,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:48,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:48,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:48,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:34:48,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615604347] [2021-03-10 21:34:48,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:48,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:48,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:48,400 INFO L87 Difference]: Start difference. First operand 3805 states and 12059 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 21:34:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:48,615 INFO L93 Difference]: Finished difference Result 5026 states and 15409 transitions. [2021-03-10 21:34:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:34:48,616 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 21:34:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:48,622 INFO L225 Difference]: With dead ends: 5026 [2021-03-10 21:34:48,622 INFO L226 Difference]: Without dead ends: 5026 [2021-03-10 21:34:48,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:34:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-03-10 21:34:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3945. [2021-03-10 21:34:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 3.1696247464503045) internal successors, (12501), 3944 states have internal predecessors, (12501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 12501 transitions. [2021-03-10 21:34:48,670 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 12501 transitions. Word has length 20 [2021-03-10 21:34:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:48,670 INFO L480 AbstractCegarLoop]: Abstraction has 3945 states and 12501 transitions. [2021-03-10 21:34:48,671 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 21:34:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 12501 transitions. [2021-03-10 21:34:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:48,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:48,673 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:48,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37981,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:48,873 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash -319341737, now seen corresponding path program 262 times [2021-03-10 21:34:48,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:48,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401160727] [2021-03-10 21:34:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:48,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401160727] [2021-03-10 21:34:48,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471917978] [2021-03-10 21:34:48,973 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 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 21:34:48,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:48,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:48,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:49,381 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:49,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:49,382 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 21:34:51,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:51,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:51,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:51,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:51,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:51,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:34:51,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361301530] [2021-03-10 21:34:51,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:34:51,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:34:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:34:51,223 INFO L87 Difference]: Start difference. First operand 3945 states and 12501 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 21:34:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:51,816 INFO L93 Difference]: Finished difference Result 4032 states and 12652 transitions. [2021-03-10 21:34:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:34:51,817 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 21:34:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:51,822 INFO L225 Difference]: With dead ends: 4032 [2021-03-10 21:34:51,822 INFO L226 Difference]: Without dead ends: 4022 [2021-03-10 21:34:51,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2021-03-10 21:34:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3946. [2021-03-10 21:34:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 3.169835234474018) internal successors, (12505), 3945 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 12505 transitions. [2021-03-10 21:34:51,869 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 12505 transitions. Word has length 20 [2021-03-10 21:34:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:51,869 INFO L480 AbstractCegarLoop]: Abstraction has 3946 states and 12505 transitions. [2021-03-10 21:34:51,869 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 21:34:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 12505 transitions. [2021-03-10 21:34:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:51,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:51,871 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:52,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37982,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:52,072 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1918399472, now seen corresponding path program 263 times [2021-03-10 21:34:52,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:52,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597135119] [2021-03-10 21:34:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:52,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597135119] [2021-03-10 21:34:52,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965126999] [2021-03-10 21:34:52,130 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 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 21:34:52,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:34:52,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:52,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:52,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:52,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:34:52,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954490602] [2021-03-10 21:34:52,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:52,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:52,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:52,195 INFO L87 Difference]: Start difference. First operand 3946 states and 12505 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 21:34:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:52,350 INFO L93 Difference]: Finished difference Result 4830 states and 14802 transitions. [2021-03-10 21:34:52,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:34:52,351 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 21:34:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:52,356 INFO L225 Difference]: With dead ends: 4830 [2021-03-10 21:34:52,356 INFO L226 Difference]: Without dead ends: 4830 [2021-03-10 21:34:52,356 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:34:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-03-10 21:34:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 2145. [2021-03-10 21:34:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.1082089552238807) internal successors, (6664), 2144 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 6664 transitions. [2021-03-10 21:34:52,389 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 6664 transitions. Word has length 20 [2021-03-10 21:34:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:52,389 INFO L480 AbstractCegarLoop]: Abstraction has 2145 states and 6664 transitions. [2021-03-10 21:34:52,389 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 21:34:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 6664 transitions. [2021-03-10 21:34:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:52,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:52,390 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:52,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38611,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:52,591 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash -893432886, now seen corresponding path program 264 times [2021-03-10 21:34:52,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:52,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809537454] [2021-03-10 21:34:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:52,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809537454] [2021-03-10 21:34:52,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682540568] [2021-03-10 21:34:52,654 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 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 21:34:52,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:34:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:52,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:52,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:52,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:34:52,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391830828] [2021-03-10 21:34:52,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:34:52,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:52,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:34:52,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:34:52,719 INFO L87 Difference]: Start difference. First operand 2145 states and 6664 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 21:34:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:52,955 INFO L93 Difference]: Finished difference Result 3482 states and 10381 transitions. [2021-03-10 21:34:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:34:52,955 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 21:34:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:52,960 INFO L225 Difference]: With dead ends: 3482 [2021-03-10 21:34:52,960 INFO L226 Difference]: Without dead ends: 3482 [2021-03-10 21:34:52,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:34:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2021-03-10 21:34:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2142. [2021-03-10 21:34:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.114899579635684) internal successors, (6669), 2141 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 6669 transitions. [2021-03-10 21:34:52,992 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 6669 transitions. Word has length 20 [2021-03-10 21:34:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:52,992 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 6669 transitions. [2021-03-10 21:34:52,992 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 21:34:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 6669 transitions. [2021-03-10 21:34:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:52,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:52,994 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:53,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38612 [2021-03-10 21:34:53,194 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1917147897, now seen corresponding path program 265 times [2021-03-10 21:34:53,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:53,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157019106] [2021-03-10 21:34:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:53,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157019106] [2021-03-10 21:34:53,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675087249] [2021-03-10 21:34:53,309 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 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 21:34:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:53,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:53,719 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:53,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:53,719 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 21:34:54,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:54,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:54,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:54,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:54,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:54,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:34:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789536694] [2021-03-10 21:34:54,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:34:54,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:34:54,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:54,807 INFO L87 Difference]: Start difference. First operand 2142 states and 6669 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:55,354 INFO L93 Difference]: Finished difference Result 2167 states and 6719 transitions. [2021-03-10 21:34:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:34:55,355 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:34:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:55,358 INFO L225 Difference]: With dead ends: 2167 [2021-03-10 21:34:55,358 INFO L226 Difference]: Without dead ends: 2162 [2021-03-10 21:34:55,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:34:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-03-10 21:34:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2140. [2021-03-10 21:34:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.115474520804114) internal successors, (6664), 2139 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 6664 transitions. [2021-03-10 21:34:55,380 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 6664 transitions. Word has length 20 [2021-03-10 21:34:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:55,380 INFO L480 AbstractCegarLoop]: Abstraction has 2140 states and 6664 transitions. [2021-03-10 21:34:55,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 6664 transitions. [2021-03-10 21:34:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:55,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:55,382 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:55,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38613 [2021-03-10 21:34:55,582 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1281932618, now seen corresponding path program 266 times [2021-03-10 21:34:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:55,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536080743] [2021-03-10 21:34:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:55,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536080743] [2021-03-10 21:34:55,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457480346] [2021-03-10 21:34:55,641 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 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 21:34:55,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:55,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:55,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:55,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:34:55,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955630318] [2021-03-10 21:34:55,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:34:55,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:34:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:34:55,711 INFO L87 Difference]: Start difference. First operand 2140 states and 6664 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 21:34:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:55,852 INFO L93 Difference]: Finished difference Result 2525 states and 7390 transitions. [2021-03-10 21:34:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:34:55,852 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 21:34:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:55,855 INFO L225 Difference]: With dead ends: 2525 [2021-03-10 21:34:55,855 INFO L226 Difference]: Without dead ends: 2525 [2021-03-10 21:34:55,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:34:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-03-10 21:34:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1487. [2021-03-10 21:34:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.057200538358008) internal successors, (4543), 1486 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4543 transitions. [2021-03-10 21:34:55,874 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4543 transitions. Word has length 20 [2021-03-10 21:34:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:55,874 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4543 transitions. [2021-03-10 21:34:55,874 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 21:34:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4543 transitions. [2021-03-10 21:34:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:55,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:55,875 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:56,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38969,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:56,076 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1529899740, now seen corresponding path program 267 times [2021-03-10 21:34:56,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:56,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630216048] [2021-03-10 21:34:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:56,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630216048] [2021-03-10 21:34:56,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695012260] [2021-03-10 21:34:56,140 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 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 21:34:56,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:34:56,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:56,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:56,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:56,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:56,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:34:56,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098112016] [2021-03-10 21:34:56,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:34:56,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:34:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:34:56,213 INFO L87 Difference]: Start difference. First operand 1487 states and 4543 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 21:34:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:56,422 INFO L93 Difference]: Finished difference Result 2253 states and 6558 transitions. [2021-03-10 21:34:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:34:56,422 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 21:34:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:56,425 INFO L225 Difference]: With dead ends: 2253 [2021-03-10 21:34:56,425 INFO L226 Difference]: Without dead ends: 2253 [2021-03-10 21:34:56,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:34:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-03-10 21:34:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1497. [2021-03-10 21:34:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.071524064171123) internal successors, (4595), 1496 states have internal predecessors, (4595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 4595 transitions. [2021-03-10 21:34:56,444 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 4595 transitions. Word has length 20 [2021-03-10 21:34:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:56,444 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 4595 transitions. [2021-03-10 21:34:56,444 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 21:34:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 4595 transitions. [2021-03-10 21:34:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:56,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:56,446 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:56,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38970,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:56,646 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:56,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:56,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1497610378, now seen corresponding path program 268 times [2021-03-10 21:34:56,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:56,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999076427] [2021-03-10 21:34:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:56,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999076427] [2021-03-10 21:34:56,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383827496] [2021-03-10 21:34:56,713 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 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 21:34:56,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:56,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:34:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:56,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:56,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:34:56,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040993563] [2021-03-10 21:34:56,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:34:56,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:56,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:34:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:34:56,786 INFO L87 Difference]: Start difference. First operand 1497 states and 4595 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 21:34:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:57,074 INFO L93 Difference]: Finished difference Result 2352 states and 6819 transitions. [2021-03-10 21:34:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:34:57,075 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 21:34:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:57,077 INFO L225 Difference]: With dead ends: 2352 [2021-03-10 21:34:57,077 INFO L226 Difference]: Without dead ends: 2352 [2021-03-10 21:34:57,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-03-10 21:34:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1723. [2021-03-10 21:34:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.0801393728222997) internal successors, (5304), 1722 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5304 transitions. [2021-03-10 21:34:57,096 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5304 transitions. Word has length 20 [2021-03-10 21:34:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:57,096 INFO L480 AbstractCegarLoop]: Abstraction has 1723 states and 5304 transitions. [2021-03-10 21:34:57,096 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 21:34:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5304 transitions. [2021-03-10 21:34:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:57,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:57,098 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:57,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38971,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:57,298 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:57,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2078632399, now seen corresponding path program 269 times [2021-03-10 21:34:57,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:57,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098328398] [2021-03-10 21:34:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:57,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098328398] [2021-03-10 21:34:57,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262768038] [2021-03-10 21:34:57,408 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 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 21:34:57,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:34:57,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:34:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:57,835 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:57,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:57,836 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 21:35:00,513 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 2093 DAG size of output: 1209 [2021-03-10 21:35:00,682 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 2093 DAG size of output: 1209 [2021-03-10 21:35:00,830 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 2100 DAG size of output: 1216 [2021-03-10 21:35:01,022 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1126 DAG size of output: 1303 [2021-03-10 21:35:02,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:02,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:02,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:02,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:02,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:02,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:35:02,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739064132] [2021-03-10 21:35:02,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:35:02,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:35:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:02,442 INFO L87 Difference]: Start difference. First operand 1723 states and 5304 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:03,004 INFO L93 Difference]: Finished difference Result 1844 states and 5522 transitions. [2021-03-10 21:35:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:35:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:35:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:03,007 INFO L225 Difference]: With dead ends: 1844 [2021-03-10 21:35:03,007 INFO L226 Difference]: Without dead ends: 1834 [2021-03-10 21:35:03,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-03-10 21:35:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1728. [2021-03-10 21:35:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.081644470179502) internal successors, (5322), 1727 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call 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 1728 states to 1728 states and 5322 transitions. [2021-03-10 21:35:03,024 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5322 transitions. Word has length 20 [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 1728 states and 5322 transitions. [2021-03-10 21:35:03,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call 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 1728 states and 5322 transitions. [2021-03-10 21:35:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:03,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:03,025 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 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: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38972 [2021-03-10 21:35:03,226 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:03,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1005776894, now seen corresponding path program 270 times [2021-03-10 21:35:03,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:03,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505280885] [2021-03-10 21:35:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:03,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505280885] [2021-03-10 21:35:03,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938502742] [2021-03-10 21:35:03,319 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 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 21:35:03,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:35:03,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:03,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:03,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:03,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341179149] [2021-03-10 21:35:03,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:03,393 INFO L87 Difference]: Start difference. First operand 1728 states and 5322 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 21:35:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:03,591 INFO L93 Difference]: Finished difference Result 2167 states and 6334 transitions. [2021-03-10 21:35:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:35:03,592 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 21:35:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:03,594 INFO L225 Difference]: With dead ends: 2167 [2021-03-10 21:35:03,594 INFO L226 Difference]: Without dead ends: 2167 [2021-03-10 21:35:03,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-03-10 21:35:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1405. [2021-03-10 21:35:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.064814814814815) internal successors, (4303), 1404 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4303 transitions. [2021-03-10 21:35:03,610 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4303 transitions. Word has length 20 [2021-03-10 21:35:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:03,610 INFO L480 AbstractCegarLoop]: Abstraction has 1405 states and 4303 transitions. [2021-03-10 21:35:03,610 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 21:35:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4303 transitions. [2021-03-10 21:35:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:03,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:03,611 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:03,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40026,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:03,812 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:03,812 INFO L82 PathProgramCache]: Analyzing trace with hash -261680284, now seen corresponding path program 271 times [2021-03-10 21:35:03,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:03,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962925616] [2021-03-10 21:35:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:03,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962925616] [2021-03-10 21:35:03,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190144252] [2021-03-10 21:35:03,886 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 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 21:35:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:03,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:03,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:03,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:03,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770618658] [2021-03-10 21:35:03,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:03,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:03,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:03,979 INFO L87 Difference]: Start difference. First operand 1405 states and 4303 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 21:35:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:04,334 INFO L93 Difference]: Finished difference Result 2152 states and 6190 transitions. [2021-03-10 21:35:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:04,335 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 21:35:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:04,338 INFO L225 Difference]: With dead ends: 2152 [2021-03-10 21:35:04,338 INFO L226 Difference]: Without dead ends: 2152 [2021-03-10 21:35:04,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:35:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-10 21:35:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1439. [2021-03-10 21:35:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.06884561891516) internal successors, (4413), 1438 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4413 transitions. [2021-03-10 21:35:04,355 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4413 transitions. Word has length 20 [2021-03-10 21:35:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:04,356 INFO L480 AbstractCegarLoop]: Abstraction has 1439 states and 4413 transitions. [2021-03-10 21:35:04,356 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 21:35:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4413 transitions. [2021-03-10 21:35:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:04,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:04,357 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:04,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40027 [2021-03-10 21:35:04,557 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:04,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:04,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1932074553, now seen corresponding path program 272 times [2021-03-10 21:35:04,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:04,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662865889] [2021-03-10 21:35:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:04,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662865889] [2021-03-10 21:35:04,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411600856] [2021-03-10 21:35:04,681 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 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 21:35:04,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:04,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:35:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:05,106 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:05,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:05,106 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 21:35:05,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:05,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:05,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:05,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:05,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:05,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:35:05,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876697771] [2021-03-10 21:35:05,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:35:05,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:05,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:35:05,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:05,991 INFO L87 Difference]: Start difference. First operand 1439 states and 4413 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:06,429 INFO L93 Difference]: Finished difference Result 1477 states and 4494 transitions. [2021-03-10 21:35:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:35:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:06,431 INFO L225 Difference]: With dead ends: 1477 [2021-03-10 21:35:06,431 INFO L226 Difference]: Without dead ends: 1472 [2021-03-10 21:35:06,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-03-10 21:35:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1440. [2021-03-10 21:35:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.069492703266157) internal successors, (4417), 1439 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4417 transitions. [2021-03-10 21:35:06,446 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4417 transitions. Word has length 20 [2021-03-10 21:35:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:06,446 INFO L480 AbstractCegarLoop]: Abstraction has 1440 states and 4417 transitions. [2021-03-10 21:35:06,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4417 transitions. [2021-03-10 21:35:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:06,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:06,447 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:06,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40028 [2021-03-10 21:35:06,648 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash -998610844, now seen corresponding path program 273 times [2021-03-10 21:35:06,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:06,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347509645] [2021-03-10 21:35:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:06,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347509645] [2021-03-10 21:35:06,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041498426] [2021-03-10 21:35:06,707 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 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 21:35:06,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:06,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:06,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:06,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:06,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:06,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:06,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102022552] [2021-03-10 21:35:06,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:06,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:06,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:06,789 INFO L87 Difference]: Start difference. First operand 1440 states and 4417 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 21:35:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:06,883 INFO L93 Difference]: Finished difference Result 1688 states and 4844 transitions. [2021-03-10 21:35:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:06,883 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 21:35:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:06,885 INFO L225 Difference]: With dead ends: 1688 [2021-03-10 21:35:06,885 INFO L226 Difference]: Without dead ends: 1688 [2021-03-10 21:35:06,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-03-10 21:35:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1452. [2021-03-10 21:35:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.071674707098553) internal successors, (4457), 1451 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4457 transitions. [2021-03-10 21:35:06,900 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4457 transitions. Word has length 20 [2021-03-10 21:35:06,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:06,900 INFO L480 AbstractCegarLoop]: Abstraction has 1452 states and 4457 transitions. [2021-03-10 21:35:06,900 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 21:35:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4457 transitions. [2021-03-10 21:35:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:06,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:06,902 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:07,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40363,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:07,103 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:07,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1235496650, now seen corresponding path program 274 times [2021-03-10 21:35:07,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:07,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721582995] [2021-03-10 21:35:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:07,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721582995] [2021-03-10 21:35:07,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855438652] [2021-03-10 21:35:07,155 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 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 21:35:07,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:07,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:07,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:07,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044132225] [2021-03-10 21:35:07,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:07,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:07,218 INFO L87 Difference]: Start difference. First operand 1452 states and 4457 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 21:35:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:07,335 INFO L93 Difference]: Finished difference Result 1715 states and 4898 transitions. [2021-03-10 21:35:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:35:07,336 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 21:35:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:07,337 INFO L225 Difference]: With dead ends: 1715 [2021-03-10 21:35:07,337 INFO L226 Difference]: Without dead ends: 1715 [2021-03-10 21:35:07,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-03-10 21:35:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1398. [2021-03-10 21:35:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.065139584824624) internal successors, (4282), 1397 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4282 transitions. [2021-03-10 21:35:07,352 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4282 transitions. Word has length 20 [2021-03-10 21:35:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:07,352 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4282 transitions. [2021-03-10 21:35:07,352 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 21:35:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4282 transitions. [2021-03-10 21:35:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:07,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:07,353 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:07,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40364,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:07,554 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:07,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1773352228, now seen corresponding path program 275 times [2021-03-10 21:35:07,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:07,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099689508] [2021-03-10 21:35:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:07,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099689508] [2021-03-10 21:35:07,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769853851] [2021-03-10 21:35:07,606 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 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 21:35:07,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:07,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:07,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:07,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:07,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:35:07,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907624340] [2021-03-10 21:35:07,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:07,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:07,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:07,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:07,677 INFO L87 Difference]: Start difference. First operand 1398 states and 4282 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 21:35:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:07,800 INFO L93 Difference]: Finished difference Result 1642 states and 4666 transitions. [2021-03-10 21:35:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:07,801 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 21:35:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:07,803 INFO L225 Difference]: With dead ends: 1642 [2021-03-10 21:35:07,803 INFO L226 Difference]: Without dead ends: 1642 [2021-03-10 21:35:07,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-03-10 21:35:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1230. [2021-03-10 21:35:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.0496338486574452) internal successors, (3748), 1229 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3748 transitions. [2021-03-10 21:35:07,816 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3748 transitions. Word has length 20 [2021-03-10 21:35:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:07,816 INFO L480 AbstractCegarLoop]: Abstraction has 1230 states and 3748 transitions. [2021-03-10 21:35:07,816 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 21:35:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3748 transitions. [2021-03-10 21:35:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:07,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:07,817 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:08,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40365,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:08,017 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1544826396, now seen corresponding path program 276 times [2021-03-10 21:35:08,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:08,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713523356] [2021-03-10 21:35:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:08,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713523356] [2021-03-10 21:35:08,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407808188] [2021-03-10 21:35:08,097 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 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 21:35:08,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:35:08,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:08,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:08,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:08,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:08,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:08,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855728482] [2021-03-10 21:35:08,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:08,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:08,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:08,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:08,185 INFO L87 Difference]: Start difference. First operand 1230 states and 3748 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 21:35:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:08,362 INFO L93 Difference]: Finished difference Result 1712 states and 4965 transitions. [2021-03-10 21:35:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:35:08,362 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 21:35:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:08,364 INFO L225 Difference]: With dead ends: 1712 [2021-03-10 21:35:08,364 INFO L226 Difference]: Without dead ends: 1712 [2021-03-10 21:35:08,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:35:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-03-10 21:35:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1463. [2021-03-10 21:35:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.056771545827633) internal successors, (4469), 1462 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4469 transitions. [2021-03-10 21:35:08,380 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4469 transitions. Word has length 20 [2021-03-10 21:35:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:08,380 INFO L480 AbstractCegarLoop]: Abstraction has 1463 states and 4469 transitions. [2021-03-10 21:35:08,380 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 21:35:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4469 transitions. [2021-03-10 21:35:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:08,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:08,381 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:08,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40366,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:08,582 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:08,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1482683722, now seen corresponding path program 277 times [2021-03-10 21:35:08,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:08,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10865263] [2021-03-10 21:35:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:08,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10865263] [2021-03-10 21:35:08,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950798475] [2021-03-10 21:35:08,659 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 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 21:35:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:08,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:08,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:08,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:08,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776376847] [2021-03-10 21:35:08,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:08,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:08,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:08,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:08,744 INFO L87 Difference]: Start difference. First operand 1463 states and 4469 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 21:35:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:09,019 INFO L93 Difference]: Finished difference Result 1740 states and 5027 transitions. [2021-03-10 21:35:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:09,020 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 21:35:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:09,022 INFO L225 Difference]: With dead ends: 1740 [2021-03-10 21:35:09,022 INFO L226 Difference]: Without dead ends: 1740 [2021-03-10 21:35:09,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-03-10 21:35:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1515. [2021-03-10 21:35:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.0548216644649933) internal successors, (4625), 1514 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4625 transitions. [2021-03-10 21:35:09,037 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4625 transitions. Word has length 20 [2021-03-10 21:35:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:09,038 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4625 transitions. [2021-03-10 21:35:09,038 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 21:35:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4625 transitions. [2021-03-10 21:35:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:09,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:09,039 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:09,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40367,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:09,239 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash 846216868, now seen corresponding path program 278 times [2021-03-10 21:35:09,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:09,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915591388] [2021-03-10 21:35:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:09,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915591388] [2021-03-10 21:35:09,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996746654] [2021-03-10 21:35:09,309 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 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 21:35:09,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:09,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:09,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:09,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:09,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:09,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671277875] [2021-03-10 21:35:09,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:09,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:09,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:09,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:09,382 INFO L87 Difference]: Start difference. First operand 1515 states and 4625 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 21:35:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:09,682 INFO L93 Difference]: Finished difference Result 1866 states and 5360 transitions. [2021-03-10 21:35:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:35:09,683 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 21:35:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:09,685 INFO L225 Difference]: With dead ends: 1866 [2021-03-10 21:35:09,685 INFO L226 Difference]: Without dead ends: 1866 [2021-03-10 21:35:09,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:35:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-03-10 21:35:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1532. [2021-03-10 21:35:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.05421293272371) internal successors, (4676), 1531 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 4676 transitions. [2021-03-10 21:35:09,701 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 4676 transitions. Word has length 20 [2021-03-10 21:35:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:09,701 INFO L480 AbstractCegarLoop]: Abstraction has 1532 states and 4676 transitions. [2021-03-10 21:35:09,701 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 21:35:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 4676 transitions. [2021-03-10 21:35:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:09,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:09,702 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:09,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40368 [2021-03-10 21:35:09,903 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:09,903 INFO L82 PathProgramCache]: Analyzing trace with hash -782068073, now seen corresponding path program 279 times [2021-03-10 21:35:09,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:09,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290306938] [2021-03-10 21:35:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290306938] [2021-03-10 21:35:10,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248401537] [2021-03-10 21:35:10,032 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 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 21:35:10,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:10,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:35:10,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:10,499 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:10,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:10,500 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 21:35:11,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:11,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:11,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:11,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:11,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:11,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:35:11,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323771460] [2021-03-10 21:35:11,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:35:11,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:35:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:11,075 INFO L87 Difference]: Start difference. First operand 1532 states and 4676 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:11,851 INFO L93 Difference]: Finished difference Result 1734 states and 5126 transitions. [2021-03-10 21:35:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:35:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:11,854 INFO L225 Difference]: With dead ends: 1734 [2021-03-10 21:35:11,854 INFO L226 Difference]: Without dead ends: 1724 [2021-03-10 21:35:11,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:11,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2021-03-10 21:35:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1581. [2021-03-10 21:35:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.0753164556962025) internal successors, (4859), 1580 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 4859 transitions. [2021-03-10 21:35:11,870 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 4859 transitions. Word has length 20 [2021-03-10 21:35:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:11,870 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 4859 transitions. [2021-03-10 21:35:11,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 4859 transitions. [2021-03-10 21:35:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:11,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:11,871 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:12,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40369 [2021-03-10 21:35:12,072 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:12,072 INFO L82 PathProgramCache]: Analyzing trace with hash -395866959, now seen corresponding path program 280 times [2021-03-10 21:35:12,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:12,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989829140] [2021-03-10 21:35:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:12,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989829140] [2021-03-10 21:35:12,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336619136] [2021-03-10 21:35:12,205 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 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 21:35:12,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:35:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:12,717 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:12,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:12,718 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 21:35:13,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:13,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:13,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:13,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:13,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:13,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 21:35:13,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606250151] [2021-03-10 21:35:13,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:35:13,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:35:13,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:13,223 INFO L87 Difference]: Start difference. First operand 1581 states and 4859 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 21:35:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:14,057 INFO L93 Difference]: Finished difference Result 1690 states and 5064 transitions. [2021-03-10 21:35:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:35:14,058 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 21:35:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:14,060 INFO L225 Difference]: With dead ends: 1690 [2021-03-10 21:35:14,060 INFO L226 Difference]: Without dead ends: 1685 [2021-03-10 21:35:14,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:35:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-03-10 21:35:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1585. [2021-03-10 21:35:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.07260101010101) internal successors, (4867), 1584 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 4867 transitions. [2021-03-10 21:35:14,076 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 4867 transitions. Word has length 20 [2021-03-10 21:35:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:14,076 INFO L480 AbstractCegarLoop]: Abstraction has 1585 states and 4867 transitions. [2021-03-10 21:35:14,076 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 21:35:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 4867 transitions. [2021-03-10 21:35:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:14,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:14,078 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:14,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40604,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:14,278 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1057130742, now seen corresponding path program 281 times [2021-03-10 21:35:14,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:14,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267170122] [2021-03-10 21:35:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267170122] [2021-03-10 21:35:14,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397082416] [2021-03-10 21:35:14,347 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 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 21:35:14,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:14,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:14,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:14,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:14,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659035915] [2021-03-10 21:35:14,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:14,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:14,417 INFO L87 Difference]: Start difference. First operand 1585 states and 4867 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 21:35:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:14,504 INFO L93 Difference]: Finished difference Result 1913 states and 5470 transitions. [2021-03-10 21:35:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:35:14,505 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 21:35:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:14,507 INFO L225 Difference]: With dead ends: 1913 [2021-03-10 21:35:14,507 INFO L226 Difference]: Without dead ends: 1913 [2021-03-10 21:35:14,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-03-10 21:35:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1593. [2021-03-10 21:35:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.074748743718593) internal successors, (4895), 1592 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 4895 transitions. [2021-03-10 21:35:14,525 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 4895 transitions. Word has length 20 [2021-03-10 21:35:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:14,525 INFO L480 AbstractCegarLoop]: Abstraction has 1593 states and 4895 transitions. [2021-03-10 21:35:14,525 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 21:35:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 4895 transitions. [2021-03-10 21:35:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:14,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:14,527 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:14,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40792 [2021-03-10 21:35:14,727 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1034884042, now seen corresponding path program 282 times [2021-03-10 21:35:14,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:14,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151799709] [2021-03-10 21:35:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151799709] [2021-03-10 21:35:14,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181913154] [2021-03-10 21:35:14,797 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 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 21:35:14,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:14,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:14,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187485940] [2021-03-10 21:35:14,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:14,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:14,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:14,894 INFO L87 Difference]: Start difference. First operand 1593 states and 4895 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 21:35:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:15,208 INFO L93 Difference]: Finished difference Result 2133 states and 6231 transitions. [2021-03-10 21:35:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:35:15,209 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 21:35:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:15,211 INFO L225 Difference]: With dead ends: 2133 [2021-03-10 21:35:15,211 INFO L226 Difference]: Without dead ends: 2133 [2021-03-10 21:35:15,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:35:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-03-10 21:35:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1640. [2021-03-10 21:35:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.0738255033557045) internal successors, (5038), 1639 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5038 transitions. [2021-03-10 21:35:15,231 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5038 transitions. Word has length 20 [2021-03-10 21:35:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:15,231 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 5038 transitions. [2021-03-10 21:35:15,231 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 21:35:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5038 transitions. [2021-03-10 21:35:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:15,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:15,233 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:15,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40793,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:15,434 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash -814361103, now seen corresponding path program 283 times [2021-03-10 21:35:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:15,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496216318] [2021-03-10 21:35:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:15,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496216318] [2021-03-10 21:35:15,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887486238] [2021-03-10 21:35:15,536 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 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 21:35:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:15,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:35:15,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:15,980 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:15,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:15,980 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 21:35:17,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:17,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:17,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:17,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:17,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:17,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 21:35:17,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402477887] [2021-03-10 21:35:17,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:35:17,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:35:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:35:17,252 INFO L87 Difference]: Start difference. First operand 1640 states and 5038 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 21:35:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:17,884 INFO L93 Difference]: Finished difference Result 1741 states and 5238 transitions. [2021-03-10 21:35:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:35:17,885 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 21:35:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:17,887 INFO L225 Difference]: With dead ends: 1741 [2021-03-10 21:35:17,887 INFO L226 Difference]: Without dead ends: 1736 [2021-03-10 21:35:17,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-03-10 21:35:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1667. [2021-03-10 21:35:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.073229291716687) internal successors, (5120), 1666 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5120 transitions. [2021-03-10 21:35:17,905 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5120 transitions. Word has length 20 [2021-03-10 21:35:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:17,905 INFO L480 AbstractCegarLoop]: Abstraction has 1667 states and 5120 transitions. [2021-03-10 21:35:17,905 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 21:35:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5120 transitions. [2021-03-10 21:35:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:17,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:17,907 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:18,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40794,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:18,107 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1515719248, now seen corresponding path program 284 times [2021-03-10 21:35:18,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:18,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014643025] [2021-03-10 21:35:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:18,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014643025] [2021-03-10 21:35:18,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116032417] [2021-03-10 21:35:18,179 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 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 21:35:18,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:18,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:18,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:18,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:18,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:18,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583569876] [2021-03-10 21:35:18,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:18,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:18,258 INFO L87 Difference]: Start difference. First operand 1667 states and 5120 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 21:35:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:18,493 INFO L93 Difference]: Finished difference Result 1916 states and 5625 transitions. [2021-03-10 21:35:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:18,494 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 21:35:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:18,496 INFO L225 Difference]: With dead ends: 1916 [2021-03-10 21:35:18,496 INFO L226 Difference]: Without dead ends: 1916 [2021-03-10 21:35:18,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-03-10 21:35:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1673. [2021-03-10 21:35:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.074162679425837) internal successors, (5140), 1672 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5140 transitions. [2021-03-10 21:35:18,513 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5140 transitions. Word has length 20 [2021-03-10 21:35:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:18,513 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 5140 transitions. [2021-03-10 21:35:18,513 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 21:35:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5140 transitions. [2021-03-10 21:35:18,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:18,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:18,514 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:18,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41225 [2021-03-10 21:35:18,715 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:18,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2142781194, now seen corresponding path program 285 times [2021-03-10 21:35:18,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:18,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610188643] [2021-03-10 21:35:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:18,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610188643] [2021-03-10 21:35:18,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614326573] [2021-03-10 21:35:18,788 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 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 21:35:18,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:18,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:18,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:18,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:18,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:18,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967729883] [2021-03-10 21:35:18,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:18,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:18,864 INFO L87 Difference]: Start difference. First operand 1673 states and 5140 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 21:35:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:19,147 INFO L93 Difference]: Finished difference Result 1968 states and 5758 transitions. [2021-03-10 21:35:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:19,148 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 21:35:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:19,150 INFO L225 Difference]: With dead ends: 1968 [2021-03-10 21:35:19,151 INFO L226 Difference]: Without dead ends: 1968 [2021-03-10 21:35:19,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:35:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-03-10 21:35:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1687. [2021-03-10 21:35:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.073546856465006) internal successors, (5182), 1686 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5182 transitions. [2021-03-10 21:35:19,170 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5182 transitions. Word has length 20 [2021-03-10 21:35:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:19,170 INFO L480 AbstractCegarLoop]: Abstraction has 1687 states and 5182 transitions. [2021-03-10 21:35:19,170 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 21:35:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5182 transitions. [2021-03-10 21:35:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:19,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:19,172 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:19,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41226,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:19,372 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1900166407, now seen corresponding path program 286 times [2021-03-10 21:35:19,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:19,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882615646] [2021-03-10 21:35:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882615646] [2021-03-10 21:35:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045891396] [2021-03-10 21:35:19,494 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 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 21:35:19,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:19,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:35:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:19,939 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:19,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:19,940 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 21:35:20,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:20,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:20,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:20,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:20,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:20,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:35:20,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401137282] [2021-03-10 21:35:20,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:35:20,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:35:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:20,547 INFO L87 Difference]: Start difference. First operand 1687 states and 5182 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:21,314 INFO L93 Difference]: Finished difference Result 1892 states and 5777 transitions. [2021-03-10 21:35:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:35:21,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 21:35:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:21,317 INFO L225 Difference]: With dead ends: 1892 [2021-03-10 21:35:21,317 INFO L226 Difference]: Without dead ends: 1887 [2021-03-10 21:35:21,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-03-10 21:35:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1842. [2021-03-10 21:35:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 3.079847908745247) internal successors, (5670), 1841 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 5670 transitions. [2021-03-10 21:35:21,335 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 5670 transitions. Word has length 20 [2021-03-10 21:35:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:21,335 INFO L480 AbstractCegarLoop]: Abstraction has 1842 states and 5670 transitions. [2021-03-10 21:35:21,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 5670 transitions. [2021-03-10 21:35:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:21,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:21,337 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:21,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41227,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:21,537 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:21,537 INFO L82 PathProgramCache]: Analyzing trace with hash -800073397, now seen corresponding path program 287 times [2021-03-10 21:35:21,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:21,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116292293] [2021-03-10 21:35:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116292293] [2021-03-10 21:35:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728075685] [2021-03-10 21:35:21,663 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 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 21:35:21,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:21,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:21,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:35:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:22,117 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:22,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:22,117 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 21:35:23,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:23,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:23,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:35:23,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:35:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:23,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:23,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:35:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19636412] [2021-03-10 21:35:23,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:35:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:35:23,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:23,478 INFO L87 Difference]: Start difference. First operand 1842 states and 5670 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 21:35:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:24,325 INFO L93 Difference]: Finished difference Result 1910 states and 5797 transitions. [2021-03-10 21:35:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:35:24,326 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 21:35:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:24,328 INFO L225 Difference]: With dead ends: 1910 [2021-03-10 21:35:24,328 INFO L226 Difference]: Without dead ends: 1905 [2021-03-10 21:35:24,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 492.0ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:35:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-03-10 21:35:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1842. [2021-03-10 21:35:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 3.079847908745247) internal successors, (5670), 1841 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 5670 transitions. [2021-03-10 21:35:24,345 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 5670 transitions. Word has length 20 [2021-03-10 21:35:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:24,346 INFO L480 AbstractCegarLoop]: Abstraction has 1842 states and 5670 transitions. [2021-03-10 21:35:24,346 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 21:35:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 5670 transitions. [2021-03-10 21:35:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:24,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:24,347 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:24,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41458,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:24,548 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:24,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1461337180, now seen corresponding path program 288 times [2021-03-10 21:35:24,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:24,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463151440] [2021-03-10 21:35:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:24,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463151440] [2021-03-10 21:35:24,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955014324] [2021-03-10 21:35:24,620 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 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 21:35:24,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:24,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:24,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:24,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627672668] [2021-03-10 21:35:24,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:24,737 INFO L87 Difference]: Start difference. First operand 1842 states and 5670 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 21:35:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:24,872 INFO L93 Difference]: Finished difference Result 2163 states and 6234 transitions. [2021-03-10 21:35:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:35:24,872 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 21:35:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:24,875 INFO L225 Difference]: With dead ends: 2163 [2021-03-10 21:35:24,875 INFO L226 Difference]: Without dead ends: 2163 [2021-03-10 21:35:24,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:35:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-03-10 21:35:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1857. [2021-03-10 21:35:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.0829741379310347) internal successors, (5722), 1856 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 5722 transitions. [2021-03-10 21:35:24,902 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 5722 transitions. Word has length 20 [2021-03-10 21:35:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:24,902 INFO L480 AbstractCegarLoop]: Abstraction has 1857 states and 5722 transitions. [2021-03-10 21:35:24,902 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 21:35:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 5722 transitions. [2021-03-10 21:35:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:24,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:24,904 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:25,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41948 [2021-03-10 21:35:25,104 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 772770314, now seen corresponding path program 289 times [2021-03-10 21:35:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773926761] [2021-03-10 21:35:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:25,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773926761] [2021-03-10 21:35:25,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283751867] [2021-03-10 21:35:25,163 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 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 21:35:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:25,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:25,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023176495] [2021-03-10 21:35:25,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:25,231 INFO L87 Difference]: Start difference. First operand 1857 states and 5722 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 21:35:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:25,407 INFO L93 Difference]: Finished difference Result 2182 states and 6364 transitions. [2021-03-10 21:35:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:35:25,408 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 21:35:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:25,411 INFO L225 Difference]: With dead ends: 2182 [2021-03-10 21:35:25,411 INFO L226 Difference]: Without dead ends: 2182 [2021-03-10 21:35:25,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-03-10 21:35:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1922. [2021-03-10 21:35:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.0853722019781364) internal successors, (5927), 1921 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 5927 transitions. [2021-03-10 21:35:25,431 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 5927 transitions. Word has length 20 [2021-03-10 21:35:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:25,431 INFO L480 AbstractCegarLoop]: Abstraction has 1922 states and 5927 transitions. [2021-03-10 21:35:25,431 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 21:35:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 5927 transitions. [2021-03-10 21:35:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:25,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:25,433 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:25,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41949 [2021-03-10 21:35:25,634 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:25,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1310625892, now seen corresponding path program 290 times [2021-03-10 21:35:25,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:25,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051795285] [2021-03-10 21:35:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:25,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051795285] [2021-03-10 21:35:25,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754025856] [2021-03-10 21:35:25,691 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 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 21:35:25,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:25,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:25,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:25,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:25,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:35:25,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893902335] [2021-03-10 21:35:25,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:25,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:25,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:25,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:25,765 INFO L87 Difference]: Start difference. First operand 1922 states and 5927 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 21:35:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:25,953 INFO L93 Difference]: Finished difference Result 2209 states and 6421 transitions. [2021-03-10 21:35:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:35:25,953 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 21:35:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:25,956 INFO L225 Difference]: With dead ends: 2209 [2021-03-10 21:35:25,956 INFO L226 Difference]: Without dead ends: 2209 [2021-03-10 21:35:25,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-03-10 21:35:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1926. [2021-03-10 21:35:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.0836363636363635) internal successors, (5936), 1925 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 5936 transitions. [2021-03-10 21:35:25,976 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 5936 transitions. Word has length 20 [2021-03-10 21:35:25,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:25,976 INFO L480 AbstractCegarLoop]: Abstraction has 1926 states and 5936 transitions. [2021-03-10 21:35:25,976 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 21:35:25,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 5936 transitions. [2021-03-10 21:35:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:25,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:25,977 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:26,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41950 [2021-03-10 21:35:26,178 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2007552732, now seen corresponding path program 291 times [2021-03-10 21:35:26,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:26,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780047922] [2021-03-10 21:35:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780047922] [2021-03-10 21:35:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610428924] [2021-03-10 21:35:26,238 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 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 21:35:26,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:35:26,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:26,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:26,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:35:26,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950687262] [2021-03-10 21:35:26,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:26,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:26,310 INFO L87 Difference]: Start difference. First operand 1926 states and 5936 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 21:35:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:26,405 INFO L93 Difference]: Finished difference Result 2031 states and 6161 transitions. [2021-03-10 21:35:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:35:26,406 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 21:35:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:26,408 INFO L225 Difference]: With dead ends: 2031 [2021-03-10 21:35:26,408 INFO L226 Difference]: Without dead ends: 2031 [2021-03-10 21:35:26,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-03-10 21:35:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1963. [2021-03-10 21:35:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.082059123343527) internal successors, (6047), 1962 states have internal predecessors, (6047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6047 transitions. [2021-03-10 21:35:26,428 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6047 transitions. Word has length 20 [2021-03-10 21:35:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:26,428 INFO L480 AbstractCegarLoop]: Abstraction has 1963 states and 6047 transitions. [2021-03-10 21:35:26,428 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 21:35:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6047 transitions. [2021-03-10 21:35:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:26,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:26,429 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:26,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41951 [2021-03-10 21:35:26,630 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1019957386, now seen corresponding path program 292 times [2021-03-10 21:35:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:26,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442516592] [2021-03-10 21:35:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:26,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442516592] [2021-03-10 21:35:26,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220830151] [2021-03-10 21:35:26,712 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 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 21:35:26,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:26,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:26,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:26,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:26,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:26,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564257677] [2021-03-10 21:35:26,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:26,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:26,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:26,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:26,784 INFO L87 Difference]: Start difference. First operand 1963 states and 6047 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 21:35:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:26,953 INFO L93 Difference]: Finished difference Result 2083 states and 6263 transitions. [2021-03-10 21:35:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:35:26,954 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 21:35:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:26,956 INFO L225 Difference]: With dead ends: 2083 [2021-03-10 21:35:26,956 INFO L226 Difference]: Without dead ends: 2083 [2021-03-10 21:35:26,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-03-10 21:35:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1962. [2021-03-10 21:35:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 3.0821009688934216) internal successors, (6044), 1961 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 6044 transitions. [2021-03-10 21:35:26,976 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 6044 transitions. Word has length 20 [2021-03-10 21:35:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:26,976 INFO L480 AbstractCegarLoop]: Abstraction has 1962 states and 6044 transitions. [2021-03-10 21:35:26,976 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 21:35:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 6044 transitions. [2021-03-10 21:35:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:26,978 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:26,978 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:27,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41952,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:27,178 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash 383490532, now seen corresponding path program 293 times [2021-03-10 21:35:27,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:27,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882669451] [2021-03-10 21:35:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:27,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882669451] [2021-03-10 21:35:27,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698287680] [2021-03-10 21:35:27,251 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 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 21:35:27,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:27,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:27,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:27,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462593542] [2021-03-10 21:35:27,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:27,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:27,324 INFO L87 Difference]: Start difference. First operand 1962 states and 6044 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 21:35:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:27,547 INFO L93 Difference]: Finished difference Result 2162 states and 6455 transitions. [2021-03-10 21:35:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:27,548 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 20 [2021-03-10 21:35:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:27,550 INFO L225 Difference]: With dead ends: 2162 [2021-03-10 21:35:27,550 INFO L226 Difference]: Without dead ends: 2162 [2021-03-10 21:35:27,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-03-10 21:35:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1974. [2021-03-10 21:35:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.0816016218955906) internal successors, (6080), 1973 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6080 transitions. [2021-03-10 21:35:27,571 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6080 transitions. Word has length 20 [2021-03-10 21:35:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:27,571 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 6080 transitions. [2021-03-10 21:35:27,571 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 21:35:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6080 transitions. [2021-03-10 21:35:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:27,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:27,572 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:27,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41953,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:27,782 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2127854538, now seen corresponding path program 294 times [2021-03-10 21:35:27,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:27,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554946014] [2021-03-10 21:35:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554946014] [2021-03-10 21:35:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575963342] [2021-03-10 21:35:27,860 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 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 21:35:27,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:27,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:35:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:27,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:27,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:27,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878221025] [2021-03-10 21:35:27,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:27,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:27,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:27,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:27,933 INFO L87 Difference]: Start difference. First operand 1974 states and 6080 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 21:35:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:28,250 INFO L93 Difference]: Finished difference Result 2334 states and 6920 transitions. [2021-03-10 21:35:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:35:28,252 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 21:35:28,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:28,254 INFO L225 Difference]: With dead ends: 2334 [2021-03-10 21:35:28,255 INFO L226 Difference]: Without dead ends: 2334 [2021-03-10 21:35:28,255 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-03-10 21:35:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1993. [2021-03-10 21:35:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 3.0808232931726907) internal successors, (6137), 1992 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 6137 transitions. [2021-03-10 21:35:28,277 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 6137 transitions. Word has length 20 [2021-03-10 21:35:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:28,277 INFO L480 AbstractCegarLoop]: Abstraction has 1993 states and 6137 transitions. [2021-03-10 21:35:28,277 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 21:35:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 6137 transitions. [2021-03-10 21:35:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:28,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:28,279 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:28,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41954,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:28,480 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:28,480 INFO L82 PathProgramCache]: Analyzing trace with hash 248568699, now seen corresponding path program 295 times [2021-03-10 21:35:28,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:28,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943604485] [2021-03-10 21:35:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:28,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943604485] [2021-03-10 21:35:28,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527888368] [2021-03-10 21:35:28,570 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 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 21:35:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:28,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:28,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:28,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:28,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:28,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500354901] [2021-03-10 21:35:28,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:28,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:28,650 INFO L87 Difference]: Start difference. First operand 1993 states and 6137 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 21:35:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:28,840 INFO L93 Difference]: Finished difference Result 2175 states and 6428 transitions. [2021-03-10 21:35:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:35:28,841 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 21:35:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:28,843 INFO L225 Difference]: With dead ends: 2175 [2021-03-10 21:35:28,843 INFO L226 Difference]: Without dead ends: 2171 [2021-03-10 21:35:28,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-03-10 21:35:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1979. [2021-03-10 21:35:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.077350859453994) internal successors, (6087), 1978 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 6087 transitions. [2021-03-10 21:35:28,866 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 6087 transitions. Word has length 21 [2021-03-10 21:35:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:28,866 INFO L480 AbstractCegarLoop]: Abstraction has 1979 states and 6087 transitions. [2021-03-10 21:35:28,866 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 21:35:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 6087 transitions. [2021-03-10 21:35:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:28,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:28,868 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:29,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41955,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:29,068 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash 905361256, now seen corresponding path program 296 times [2021-03-10 21:35:29,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:29,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564703581] [2021-03-10 21:35:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:29,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564703581] [2021-03-10 21:35:29,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392860341] [2021-03-10 21:35:29,151 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 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 21:35:29,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:29,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:29,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:29,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:29,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017029064] [2021-03-10 21:35:29,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:29,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:29,244 INFO L87 Difference]: Start difference. First operand 1979 states and 6087 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 21:35:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:29,547 INFO L93 Difference]: Finished difference Result 2309 states and 6715 transitions. [2021-03-10 21:35:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:35:29,548 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 21:35:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:29,550 INFO L225 Difference]: With dead ends: 2309 [2021-03-10 21:35:29,550 INFO L226 Difference]: Without dead ends: 2300 [2021-03-10 21:35:29,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-03-10 21:35:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1963. [2021-03-10 21:35:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.070846075433231) internal successors, (6025), 1962 states have internal predecessors, (6025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6025 transitions. [2021-03-10 21:35:29,571 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6025 transitions. Word has length 21 [2021-03-10 21:35:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:29,571 INFO L480 AbstractCegarLoop]: Abstraction has 1963 states and 6025 transitions. [2021-03-10 21:35:29,571 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 21:35:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6025 transitions. [2021-03-10 21:35:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:29,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:29,573 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:29,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41956 [2021-03-10 21:35:29,773 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1825157759, now seen corresponding path program 297 times [2021-03-10 21:35:29,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:29,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91877351] [2021-03-10 21:35:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:29,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91877351] [2021-03-10 21:35:29,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92291799] [2021-03-10 21:35:29,843 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 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 21:35:29,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:29,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:29,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:29,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:35:29,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044052605] [2021-03-10 21:35:29,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:29,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:29,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:29,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:29,921 INFO L87 Difference]: Start difference. First operand 1963 states and 6025 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 21:35:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:30,089 INFO L93 Difference]: Finished difference Result 2022 states and 6114 transitions. [2021-03-10 21:35:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:30,089 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 21:35:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:30,092 INFO L225 Difference]: With dead ends: 2022 [2021-03-10 21:35:30,092 INFO L226 Difference]: Without dead ends: 2018 [2021-03-10 21:35:30,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-03-10 21:35:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1963. [2021-03-10 21:35:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.0688073394495414) internal successors, (6021), 1962 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6021 transitions. [2021-03-10 21:35:30,111 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6021 transitions. Word has length 21 [2021-03-10 21:35:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:30,112 INFO L480 AbstractCegarLoop]: Abstraction has 1963 states and 6021 transitions. [2021-03-10 21:35:30,112 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 21:35:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6021 transitions. [2021-03-10 21:35:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:30,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:30,113 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:30,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41957,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:30,314 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1163893976, now seen corresponding path program 298 times [2021-03-10 21:35:30,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:30,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664494433] [2021-03-10 21:35:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664494433] [2021-03-10 21:35:30,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834449956] [2021-03-10 21:35:30,386 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 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 21:35:30,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:30,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:30,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:30,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:35:30,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598165372] [2021-03-10 21:35:30,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:30,465 INFO L87 Difference]: Start difference. First operand 1963 states and 6021 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 21:35:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:30,558 INFO L93 Difference]: Finished difference Result 2284 states and 6593 transitions. [2021-03-10 21:35:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:30,559 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 21:35:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:30,561 INFO L225 Difference]: With dead ends: 2284 [2021-03-10 21:35:30,561 INFO L226 Difference]: Without dead ends: 2284 [2021-03-10 21:35:30,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-03-10 21:35:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1947. [2021-03-10 21:35:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 3.063720452209661) internal successors, (5962), 1946 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 5962 transitions. [2021-03-10 21:35:30,582 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 5962 transitions. Word has length 21 [2021-03-10 21:35:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:30,582 INFO L480 AbstractCegarLoop]: Abstraction has 1947 states and 5962 transitions. [2021-03-10 21:35:30,582 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 21:35:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 5962 transitions. [2021-03-10 21:35:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:30,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:30,584 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:30,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41958 [2021-03-10 21:35:30,784 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1822635909, now seen corresponding path program 299 times [2021-03-10 21:35:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:30,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047868397] [2021-03-10 21:35:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047868397] [2021-03-10 21:35:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314933382] [2021-03-10 21:35:30,852 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 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 21:35:30,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:30,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:30,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:35:30,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511358119] [2021-03-10 21:35:30,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:30,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:30,924 INFO L87 Difference]: Start difference. First operand 1947 states and 5962 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 21:35:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:31,081 INFO L93 Difference]: Finished difference Result 2051 states and 6168 transitions. [2021-03-10 21:35:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:31,082 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 21:35:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:31,085 INFO L225 Difference]: With dead ends: 2051 [2021-03-10 21:35:31,085 INFO L226 Difference]: Without dead ends: 2043 [2021-03-10 21:35:31,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-03-10 21:35:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1955. [2021-03-10 21:35:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1954 states have (on average 3.0624360286591608) internal successors, (5984), 1954 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 5984 transitions. [2021-03-10 21:35:31,115 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 5984 transitions. Word has length 21 [2021-03-10 21:35:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:31,115 INFO L480 AbstractCegarLoop]: Abstraction has 1955 states and 5984 transitions. [2021-03-10 21:35:31,115 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 21:35:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 5984 transitions. [2021-03-10 21:35:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:31,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:31,117 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:31,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41959,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:31,317 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:31,318 INFO L82 PathProgramCache]: Analyzing trace with hash -865456514, now seen corresponding path program 300 times [2021-03-10 21:35:31,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:31,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699076925] [2021-03-10 21:35:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:31,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699076925] [2021-03-10 21:35:31,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630059384] [2021-03-10 21:35:31,387 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 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 21:35:31,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:31,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:31,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:31,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:35:31,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036574588] [2021-03-10 21:35:31,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:31,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:31,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:31,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:31,466 INFO L87 Difference]: Start difference. First operand 1955 states and 5984 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 21:35:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:31,580 INFO L93 Difference]: Finished difference Result 2386 states and 6859 transitions. [2021-03-10 21:35:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:35:31,580 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 21:35:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:31,583 INFO L225 Difference]: With dead ends: 2386 [2021-03-10 21:35:31,583 INFO L226 Difference]: Without dead ends: 2386 [2021-03-10 21:35:31,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-03-10 21:35:31,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1958. [2021-03-10 21:35:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 3.062851303014819) internal successors, (5994), 1957 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5994 transitions. [2021-03-10 21:35:31,604 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5994 transitions. Word has length 21 [2021-03-10 21:35:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:31,604 INFO L480 AbstractCegarLoop]: Abstraction has 1958 states and 5994 transitions. [2021-03-10 21:35:31,604 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 21:35:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5994 transitions. [2021-03-10 21:35:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:31,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:31,606 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:31,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41960 [2021-03-10 21:35:31,806 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1059877375, now seen corresponding path program 301 times [2021-03-10 21:35:31,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:31,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76904674] [2021-03-10 21:35:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76904674] [2021-03-10 21:35:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082404884] [2021-03-10 21:35:31,881 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 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 21:35:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:31,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:31,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:31,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976934005] [2021-03-10 21:35:31,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:31,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:31,948 INFO L87 Difference]: Start difference. First operand 1958 states and 5994 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 21:35:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:32,100 INFO L93 Difference]: Finished difference Result 2065 states and 6193 transitions. [2021-03-10 21:35:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:32,101 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 21:35:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:32,104 INFO L225 Difference]: With dead ends: 2065 [2021-03-10 21:35:32,104 INFO L226 Difference]: Without dead ends: 2053 [2021-03-10 21:35:32,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-03-10 21:35:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1958. [2021-03-10 21:35:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 3.061318344404701) internal successors, (5991), 1957 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5991 transitions. [2021-03-10 21:35:32,126 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5991 transitions. Word has length 21 [2021-03-10 21:35:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:32,127 INFO L480 AbstractCegarLoop]: Abstraction has 1958 states and 5991 transitions. [2021-03-10 21:35:32,127 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 21:35:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5991 transitions. [2021-03-10 21:35:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:32,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:32,128 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:32,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41961 [2021-03-10 21:35:32,329 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:32,329 INFO L82 PathProgramCache]: Analyzing trace with hash 649187736, now seen corresponding path program 302 times [2021-03-10 21:35:32,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:32,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191890804] [2021-03-10 21:35:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:32,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191890804] [2021-03-10 21:35:32,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478586911] [2021-03-10 21:35:32,413 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 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 21:35:32,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:32,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:32,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:32,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:32,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335400450] [2021-03-10 21:35:32,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:32,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:32,502 INFO L87 Difference]: Start difference. First operand 1958 states and 5991 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 21:35:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:32,691 INFO L93 Difference]: Finished difference Result 2496 states and 7167 transitions. [2021-03-10 21:35:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:35:32,692 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 21:35:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:32,694 INFO L225 Difference]: With dead ends: 2496 [2021-03-10 21:35:32,694 INFO L226 Difference]: Without dead ends: 2496 [2021-03-10 21:35:32,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-03-10 21:35:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1961. [2021-03-10 21:35:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 3.061224489795918) internal successors, (6000), 1960 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 6000 transitions. [2021-03-10 21:35:32,720 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 6000 transitions. Word has length 21 [2021-03-10 21:35:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:32,720 INFO L480 AbstractCegarLoop]: Abstraction has 1961 states and 6000 transitions. [2021-03-10 21:35:32,720 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 21:35:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 6000 transitions. [2021-03-10 21:35:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:32,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:32,722 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:32,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41962 [2021-03-10 21:35:32,923 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1454406011, now seen corresponding path program 303 times [2021-03-10 21:35:32,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:32,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632366452] [2021-03-10 21:35:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632366452] [2021-03-10 21:35:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787904707] [2021-03-10 21:35:32,987 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 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 21:35:33,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:35:33,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:35:33,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:33,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:33,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413170379] [2021-03-10 21:35:33,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:33,069 INFO L87 Difference]: Start difference. First operand 1961 states and 6000 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 21:35:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:33,155 INFO L93 Difference]: Finished difference Result 2213 states and 6489 transitions. [2021-03-10 21:35:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:35:33,156 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 21:35:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:33,158 INFO L225 Difference]: With dead ends: 2213 [2021-03-10 21:35:33,158 INFO L226 Difference]: Without dead ends: 2211 [2021-03-10 21:35:33,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-03-10 21:35:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1969. [2021-03-10 21:35:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.0523373983739837) internal successors, (6007), 1968 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6007 transitions. [2021-03-10 21:35:33,180 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6007 transitions. Word has length 21 [2021-03-10 21:35:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:33,180 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 6007 transitions. [2021-03-10 21:35:33,180 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 21:35:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6007 transitions. [2021-03-10 21:35:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:33,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:33,182 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:33,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41963,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:33,382 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1535536296, now seen corresponding path program 304 times [2021-03-10 21:35:33,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:33,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482463909] [2021-03-10 21:35:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:33,433 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 21:35:33,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482463909] [2021-03-10 21:35:33,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753350093] [2021-03-10 21:35:33,433 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 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 21:35:33,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:33,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:35:33,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:33,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:33,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938247041] [2021-03-10 21:35:33,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:33,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:33,499 INFO L87 Difference]: Start difference. First operand 1969 states and 6007 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 21:35:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:33,657 INFO L93 Difference]: Finished difference Result 2209 states and 6411 transitions. [2021-03-10 21:35:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:35:33,657 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 21:35:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:33,660 INFO L225 Difference]: With dead ends: 2209 [2021-03-10 21:35:33,660 INFO L226 Difference]: Without dead ends: 2207 [2021-03-10 21:35:33,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-03-10 21:35:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1981. [2021-03-10 21:35:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.051010101010101) internal successors, (6041), 1980 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6041 transitions. [2021-03-10 21:35:33,680 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6041 transitions. Word has length 21 [2021-03-10 21:35:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:33,680 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6041 transitions. [2021-03-10 21:35:33,680 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 21:35:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6041 transitions. [2021-03-10 21:35:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:33,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:33,682 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:33,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41964,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:33,883 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash 327009918, now seen corresponding path program 305 times [2021-03-10 21:35:33,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:33,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757238364] [2021-03-10 21:35:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:33,940 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 21:35:33,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757238364] [2021-03-10 21:35:33,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200630888] [2021-03-10 21:35:33,940 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 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 21:35:33,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:34,012 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 21:35:34,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:34,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:34,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272239116] [2021-03-10 21:35:34,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:34,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:34,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:34,012 INFO L87 Difference]: Start difference. First operand 1981 states and 6041 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 21:35:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:34,118 INFO L93 Difference]: Finished difference Result 2324 states and 6703 transitions. [2021-03-10 21:35:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:35:34,119 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 21:35:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:34,122 INFO L225 Difference]: With dead ends: 2324 [2021-03-10 21:35:34,122 INFO L226 Difference]: Without dead ends: 2324 [2021-03-10 21:35:34,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-03-10 21:35:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1980. [2021-03-10 21:35:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.0505305709954524) internal successors, (6037), 1979 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6037 transitions. [2021-03-10 21:35:34,146 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6037 transitions. Word has length 21 [2021-03-10 21:35:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:34,147 INFO L480 AbstractCegarLoop]: Abstraction has 1980 states and 6037 transitions. [2021-03-10 21:35:34,147 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 21:35:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6037 transitions. [2021-03-10 21:35:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:34,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:34,148 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:34,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41965,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:34,349 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1275555135, now seen corresponding path program 306 times [2021-03-10 21:35:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:34,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313589983] [2021-03-10 21:35:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:34,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313589983] [2021-03-10 21:35:34,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721077038] [2021-03-10 21:35:34,416 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 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 21:35:34,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:35:34,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:34,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:34,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:34,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:34,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810274243] [2021-03-10 21:35:34,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:34,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:34,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:34,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:34,484 INFO L87 Difference]: Start difference. First operand 1980 states and 6037 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 21:35:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:34,656 INFO L93 Difference]: Finished difference Result 2132 states and 6310 transitions. [2021-03-10 21:35:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:34,657 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 21:35:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:34,659 INFO L225 Difference]: With dead ends: 2132 [2021-03-10 21:35:34,659 INFO L226 Difference]: Without dead ends: 2114 [2021-03-10 21:35:34,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-03-10 21:35:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1950. [2021-03-10 21:35:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.047716777834787) internal successors, (5940), 1949 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 5940 transitions. [2021-03-10 21:35:34,680 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 5940 transitions. Word has length 21 [2021-03-10 21:35:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:34,680 INFO L480 AbstractCegarLoop]: Abstraction has 1950 states and 5940 transitions. [2021-03-10 21:35:34,680 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 21:35:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 5940 transitions. [2021-03-10 21:35:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:34,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:34,681 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:34,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41966,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:34,882 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:34,882 INFO L82 PathProgramCache]: Analyzing trace with hash 864865496, now seen corresponding path program 307 times [2021-03-10 21:35:34,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:34,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580159613] [2021-03-10 21:35:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580159613] [2021-03-10 21:35:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179715839] [2021-03-10 21:35:34,946 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 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 21:35:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:34,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:35,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:35,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:35,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536482165] [2021-03-10 21:35:35,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:35,016 INFO L87 Difference]: Start difference. First operand 1950 states and 5940 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 21:35:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:35,149 INFO L93 Difference]: Finished difference Result 2430 states and 6974 transitions. [2021-03-10 21:35:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:35:35,150 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 21:35:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:35,152 INFO L225 Difference]: With dead ends: 2430 [2021-03-10 21:35:35,152 INFO L226 Difference]: Without dead ends: 2430 [2021-03-10 21:35:35,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-03-10 21:35:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1953. [2021-03-10 21:35:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.0476434426229506) internal successors, (5949), 1952 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5949 transitions. [2021-03-10 21:35:35,173 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5949 transitions. Word has length 21 [2021-03-10 21:35:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:35,173 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 5949 transitions. [2021-03-10 21:35:35,173 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 21:35:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5949 transitions. [2021-03-10 21:35:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:35,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:35,175 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:35,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41967,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:35,376 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash 223475963, now seen corresponding path program 308 times [2021-03-10 21:35:35,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:35,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688165506] [2021-03-10 21:35:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:35,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688165506] [2021-03-10 21:35:35,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185885882] [2021-03-10 21:35:35,477 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 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 21:35:35,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:35,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:35,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:35,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163052146] [2021-03-10 21:35:35,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:35,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:35,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:35,556 INFO L87 Difference]: Start difference. First operand 1953 states and 5949 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 21:35:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:35,728 INFO L93 Difference]: Finished difference Result 2111 states and 6245 transitions. [2021-03-10 21:35:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:35,729 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 21:35:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:35,732 INFO L225 Difference]: With dead ends: 2111 [2021-03-10 21:35:35,732 INFO L226 Difference]: Without dead ends: 2103 [2021-03-10 21:35:35,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-03-10 21:35:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1953. [2021-03-10 21:35:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.045594262295082) internal successors, (5945), 1952 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 21:35:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5945 transitions. [2021-03-10 21:35:35,753 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5945 transitions. Word has length 21 [2021-03-10 21:35:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:35,753 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 5945 transitions. [2021-03-10 21:35:35,754 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 21:35:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5945 transitions. [2021-03-10 21:35:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:35,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:35,755 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:35,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41968,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:35,956 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:35,956 INFO L82 PathProgramCache]: Analyzing trace with hash 358519230, now seen corresponding path program 309 times [2021-03-10 21:35:35,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:35,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455859082] [2021-03-10 21:35:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455859082] [2021-03-10 21:35:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697818197] [2021-03-10 21:35:36,021 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 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 21:35:36,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:36,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:36,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:36,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:36,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557898101] [2021-03-10 21:35:36,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:36,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:36,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:36,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:36,102 INFO L87 Difference]: Start difference. First operand 1953 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 21:35:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:36,380 INFO L93 Difference]: Finished difference Result 2622 states and 7467 transitions. [2021-03-10 21:35:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:36,381 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 21:35:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:36,383 INFO L225 Difference]: With dead ends: 2622 [2021-03-10 21:35:36,384 INFO L226 Difference]: Without dead ends: 2622 [2021-03-10 21:35:36,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-03-10 21:35:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1843. [2021-03-10 21:35:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 3.03800217155266) internal successors, (5596), 1842 states have internal predecessors, (5596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 5596 transitions. [2021-03-10 21:35:36,406 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 5596 transitions. Word has length 21 [2021-03-10 21:35:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:36,406 INFO L480 AbstractCegarLoop]: Abstraction has 1843 states and 5596 transitions. [2021-03-10 21:35:36,406 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 21:35:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 5596 transitions. [2021-03-10 21:35:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:36,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:36,408 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:36,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41969,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:36,608 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash -449518021, now seen corresponding path program 310 times [2021-03-10 21:35:36,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:36,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000126267] [2021-03-10 21:35:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:36,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000126267] [2021-03-10 21:35:36,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3609215] [2021-03-10 21:35:36,664 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 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 21:35:36,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:36,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:35:36,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:36,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:36,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869811783] [2021-03-10 21:35:36,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:36,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:36,736 INFO L87 Difference]: Start difference. First operand 1843 states and 5596 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 21:35:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:36,823 INFO L93 Difference]: Finished difference Result 2094 states and 6088 transitions. [2021-03-10 21:35:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:35:36,824 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 21:35:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:36,826 INFO L225 Difference]: With dead ends: 2094 [2021-03-10 21:35:36,826 INFO L226 Difference]: Without dead ends: 2092 [2021-03-10 21:35:36,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-03-10 21:35:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1844. [2021-03-10 21:35:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.0336408030385242) internal successors, (5591), 1843 states have internal predecessors, (5591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5591 transitions. [2021-03-10 21:35:36,845 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5591 transitions. Word has length 21 [2021-03-10 21:35:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:36,846 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 5591 transitions. [2021-03-10 21:35:36,846 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 21:35:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5591 transitions. [2021-03-10 21:35:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:36,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:36,847 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:37,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41970 [2021-03-10 21:35:37,048 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -368387736, now seen corresponding path program 311 times [2021-03-10 21:35:37,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:37,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939242954] [2021-03-10 21:35:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:37,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939242954] [2021-03-10 21:35:37,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973638965] [2021-03-10 21:35:37,096 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 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 21:35:37,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:37,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:35:37,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:37,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:37,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776903736] [2021-03-10 21:35:37,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:37,162 INFO L87 Difference]: Start difference. First operand 1844 states and 5591 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 21:35:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:37,319 INFO L93 Difference]: Finished difference Result 2057 states and 5918 transitions. [2021-03-10 21:35:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:35:37,320 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 21:35:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:37,322 INFO L225 Difference]: With dead ends: 2057 [2021-03-10 21:35:37,322 INFO L226 Difference]: Without dead ends: 2055 [2021-03-10 21:35:37,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-03-10 21:35:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1844. [2021-03-10 21:35:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.030385241454151) internal successors, (5585), 1843 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5585 transitions. [2021-03-10 21:35:37,342 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5585 transitions. Word has length 21 [2021-03-10 21:35:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:37,342 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 5585 transitions. [2021-03-10 21:35:37,342 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 21:35:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5585 transitions. [2021-03-10 21:35:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:37,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:37,343 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:37,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41971 [2021-03-10 21:35:37,544 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:37,544 INFO L82 PathProgramCache]: Analyzing trace with hash -628368897, now seen corresponding path program 312 times [2021-03-10 21:35:37,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:37,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753026045] [2021-03-10 21:35:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:37,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753026045] [2021-03-10 21:35:37,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220037263] [2021-03-10 21:35:37,614 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 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 21:35:37,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:35:37,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:37,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:37,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:37,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773001647] [2021-03-10 21:35:37,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:37,689 INFO L87 Difference]: Start difference. First operand 1844 states and 5585 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 21:35:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:37,892 INFO L93 Difference]: Finished difference Result 1999 states and 5867 transitions. [2021-03-10 21:35:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:37,893 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 21:35:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:37,895 INFO L225 Difference]: With dead ends: 1999 [2021-03-10 21:35:37,895 INFO L226 Difference]: Without dead ends: 1985 [2021-03-10 21:35:37,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-03-10 21:35:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1816. [2021-03-10 21:35:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.0292011019283747) internal successors, (5498), 1815 states have internal predecessors, (5498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5498 transitions. [2021-03-10 21:35:37,913 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5498 transitions. Word has length 21 [2021-03-10 21:35:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:37,913 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 5498 transitions. [2021-03-10 21:35:37,914 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 21:35:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5498 transitions. [2021-03-10 21:35:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:37,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:37,915 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:38,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41972 [2021-03-10 21:35:38,116 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1039058536, now seen corresponding path program 313 times [2021-03-10 21:35:38,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:38,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375393102] [2021-03-10 21:35:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:38,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375393102] [2021-03-10 21:35:38,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338094226] [2021-03-10 21:35:38,177 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 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 21:35:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:38,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:38,246 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 21:35:38,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:38,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:38,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569315512] [2021-03-10 21:35:38,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 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 13 interpolants. [2021-03-10 21:35:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:38,247 INFO L87 Difference]: Start difference. First operand 1816 states and 5498 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 21:35:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:38,364 INFO L93 Difference]: Finished difference Result 2171 states and 6223 transitions. [2021-03-10 21:35:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:38,365 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 21:35:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:38,367 INFO L225 Difference]: With dead ends: 2171 [2021-03-10 21:35:38,367 INFO L226 Difference]: Without dead ends: 2171 [2021-03-10 21:35:38,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-03-10 21:35:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1798. [2021-03-10 21:35:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.025598219254313) internal successors, (5437), 1797 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 5437 transitions. [2021-03-10 21:35:38,386 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 5437 transitions. Word has length 21 [2021-03-10 21:35:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:38,386 INFO L480 AbstractCegarLoop]: Abstraction has 1798 states and 5437 transitions. [2021-03-10 21:35:38,386 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 21:35:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 5437 transitions. [2021-03-10 21:35:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:38,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:38,388 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:38,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41973 [2021-03-10 21:35:38,588 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:38,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:38,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1680448069, now seen corresponding path program 314 times [2021-03-10 21:35:38,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:38,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180648073] [2021-03-10 21:35:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:38,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180648073] [2021-03-10 21:35:38,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365334388] [2021-03-10 21:35:38,659 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 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 21:35:38,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:38,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:38,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:38,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:38,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:38,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656137448] [2021-03-10 21:35:38,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:38,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:38,735 INFO L87 Difference]: Start difference. First operand 1798 states and 5437 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 21:35:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:38,928 INFO L93 Difference]: Finished difference Result 1973 states and 5763 transitions. [2021-03-10 21:35:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:35:38,928 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 21:35:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:38,931 INFO L225 Difference]: With dead ends: 1973 [2021-03-10 21:35:38,931 INFO L226 Difference]: Without dead ends: 1965 [2021-03-10 21:35:38,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:35:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-03-10 21:35:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1798. [2021-03-10 21:35:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.0211463550361715) internal successors, (5429), 1797 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 5429 transitions. [2021-03-10 21:35:38,951 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 5429 transitions. Word has length 21 [2021-03-10 21:35:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:38,951 INFO L480 AbstractCegarLoop]: Abstraction has 1798 states and 5429 transitions. [2021-03-10 21:35:38,951 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 21:35:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 5429 transitions. [2021-03-10 21:35:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:38,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:38,952 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:39,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41974,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:39,153 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1545404802, now seen corresponding path program 315 times [2021-03-10 21:35:39,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:39,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639047898] [2021-03-10 21:35:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639047898] [2021-03-10 21:35:39,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477578456] [2021-03-10 21:35:39,219 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 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 21:35:39,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:39,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:39,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:39,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337005884] [2021-03-10 21:35:39,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:39,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:39,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:39,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:39,306 INFO L87 Difference]: Start difference. First operand 1798 states and 5429 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 21:35:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:39,476 INFO L93 Difference]: Finished difference Result 2324 states and 6595 transitions. [2021-03-10 21:35:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:35:39,477 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 21:35:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:39,479 INFO L225 Difference]: With dead ends: 2324 [2021-03-10 21:35:39,479 INFO L226 Difference]: Without dead ends: 2324 [2021-03-10 21:35:39,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:35:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-03-10 21:35:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1725. [2021-03-10 21:35:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 3.019141531322506) internal successors, (5205), 1724 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 5205 transitions. [2021-03-10 21:35:39,497 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 5205 transitions. Word has length 21 [2021-03-10 21:35:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:39,497 INFO L480 AbstractCegarLoop]: Abstraction has 1725 states and 5205 transitions. [2021-03-10 21:35:39,497 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 21:35:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 5205 transitions. [2021-03-10 21:35:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:39,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:39,498 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:39,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41975,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:39,699 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash 64835967, now seen corresponding path program 316 times [2021-03-10 21:35:39,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:39,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492568177] [2021-03-10 21:35:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:39,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492568177] [2021-03-10 21:35:39,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356136254] [2021-03-10 21:35:39,788 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 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 21:35:39,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:39,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:39,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:39,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791556042] [2021-03-10 21:35:39,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:39,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:39,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:39,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:39,881 INFO L87 Difference]: Start difference. First operand 1725 states and 5205 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 21:35:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:40,093 INFO L93 Difference]: Finished difference Result 1981 states and 5745 transitions. [2021-03-10 21:35:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:40,093 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 21:35:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:40,095 INFO L225 Difference]: With dead ends: 1981 [2021-03-10 21:35:40,095 INFO L226 Difference]: Without dead ends: 1971 [2021-03-10 21:35:40,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-03-10 21:35:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1727. [2021-03-10 21:35:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 3.0162224797219004) internal successors, (5206), 1726 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 5206 transitions. [2021-03-10 21:35:40,114 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 5206 transitions. Word has length 21 [2021-03-10 21:35:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:40,114 INFO L480 AbstractCegarLoop]: Abstraction has 1727 states and 5206 transitions. [2021-03-10 21:35:40,114 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 21:35:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 5206 transitions. [2021-03-10 21:35:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:40,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:40,115 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:40,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41976,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:40,316 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:40,316 INFO L82 PathProgramCache]: Analyzing trace with hash -62269864, now seen corresponding path program 317 times [2021-03-10 21:35:40,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:40,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761948854] [2021-03-10 21:35:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:40,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761948854] [2021-03-10 21:35:40,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394167133] [2021-03-10 21:35:40,386 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 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 21:35:40,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:40,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:40,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:40,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:40,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091662587] [2021-03-10 21:35:40,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:40,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:40,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:40,466 INFO L87 Difference]: Start difference. First operand 1727 states and 5206 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 21:35:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:40,712 INFO L93 Difference]: Finished difference Result 3120 states and 8943 transitions. [2021-03-10 21:35:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:40,713 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 21:35:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:40,716 INFO L225 Difference]: With dead ends: 3120 [2021-03-10 21:35:40,716 INFO L226 Difference]: Without dead ends: 3120 [2021-03-10 21:35:40,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-03-10 21:35:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 1848. [2021-03-10 21:35:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.012452625879805) internal successors, (5564), 1847 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5564 transitions. [2021-03-10 21:35:40,738 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5564 transitions. Word has length 21 [2021-03-10 21:35:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:40,738 INFO L480 AbstractCegarLoop]: Abstraction has 1848 states and 5564 transitions. [2021-03-10 21:35:40,738 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 21:35:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5564 transitions. [2021-03-10 21:35:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:40,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:40,740 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:40,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41977 [2021-03-10 21:35:40,940 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:40,941 INFO L82 PathProgramCache]: Analyzing trace with hash 658379131, now seen corresponding path program 318 times [2021-03-10 21:35:40,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:40,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047275599] [2021-03-10 21:35:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:40,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047275599] [2021-03-10 21:35:40,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756674195] [2021-03-10 21:35:40,995 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 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 21:35:41,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:41,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:35:41,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:41,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:41,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994889321] [2021-03-10 21:35:41,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:41,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:41,071 INFO L87 Difference]: Start difference. First operand 1848 states and 5564 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 21:35:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:41,150 INFO L93 Difference]: Finished difference Result 2112 states and 6071 transitions. [2021-03-10 21:35:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:35:41,151 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 21:35:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:41,153 INFO L225 Difference]: With dead ends: 2112 [2021-03-10 21:35:41,153 INFO L226 Difference]: Without dead ends: 2110 [2021-03-10 21:35:41,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-03-10 21:35:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1839. [2021-03-10 21:35:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1838 states have (on average 3.0087051142546244) internal successors, (5530), 1838 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 5530 transitions. [2021-03-10 21:35:41,176 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 5530 transitions. Word has length 21 [2021-03-10 21:35:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:41,176 INFO L480 AbstractCegarLoop]: Abstraction has 1839 states and 5530 transitions. [2021-03-10 21:35:41,176 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 21:35:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 5530 transitions. [2021-03-10 21:35:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:41,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:41,178 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:41,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41978,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:41,379 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash 739509416, now seen corresponding path program 319 times [2021-03-10 21:35:41,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:41,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567753042] [2021-03-10 21:35:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:41,427 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 21:35:41,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567753042] [2021-03-10 21:35:41,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569264119] [2021-03-10 21:35:41,427 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 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 21:35:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:35:41,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:41,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:41,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068456014] [2021-03-10 21:35:41,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:41,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:41,494 INFO L87 Difference]: Start difference. First operand 1839 states and 5530 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 21:35:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:41,644 INFO L93 Difference]: Finished difference Result 2052 states and 5923 transitions. [2021-03-10 21:35:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:35:41,645 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 21:35:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:41,647 INFO L225 Difference]: With dead ends: 2052 [2021-03-10 21:35:41,647 INFO L226 Difference]: Without dead ends: 2050 [2021-03-10 21:35:41,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-03-10 21:35:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1862. [2021-03-10 21:35:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 3.0112842557764643) internal successors, (5604), 1861 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5604 transitions. [2021-03-10 21:35:41,666 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5604 transitions. Word has length 21 [2021-03-10 21:35:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:41,666 INFO L480 AbstractCegarLoop]: Abstraction has 1862 states and 5604 transitions. [2021-03-10 21:35:41,666 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 21:35:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5604 transitions. [2021-03-10 21:35:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:41,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:41,668 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:41,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41979,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:41,868 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 479528255, now seen corresponding path program 320 times [2021-03-10 21:35:41,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:41,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348066997] [2021-03-10 21:35:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:41,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348066997] [2021-03-10 21:35:41,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984942369] [2021-03-10 21:35:41,936 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 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 21:35:41,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:41,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:42,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:42,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:42,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376217486] [2021-03-10 21:35:42,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:42,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:42,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:42,003 INFO L87 Difference]: Start difference. First operand 1862 states and 5604 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 21:35:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:42,182 INFO L93 Difference]: Finished difference Result 2109 states and 6032 transitions. [2021-03-10 21:35:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:42,183 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 21:35:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:42,186 INFO L225 Difference]: With dead ends: 2109 [2021-03-10 21:35:42,186 INFO L226 Difference]: Without dead ends: 2089 [2021-03-10 21:35:42,186 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-03-10 21:35:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1826. [2021-03-10 21:35:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 2.9983561643835617) internal successors, (5472), 1825 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 5472 transitions. [2021-03-10 21:35:42,207 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 5472 transitions. Word has length 21 [2021-03-10 21:35:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:42,207 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 5472 transitions. [2021-03-10 21:35:42,207 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 21:35:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 5472 transitions. [2021-03-10 21:35:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:42,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:42,208 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:42,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41980 [2021-03-10 21:35:42,409 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:42,409 INFO L82 PathProgramCache]: Analyzing trace with hash -572550917, now seen corresponding path program 321 times [2021-03-10 21:35:42,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:42,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681562469] [2021-03-10 21:35:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:42,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681562469] [2021-03-10 21:35:42,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793110562] [2021-03-10 21:35:42,486 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 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 21:35:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:42,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:42,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:42,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:42,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968181268] [2021-03-10 21:35:42,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:42,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:42,554 INFO L87 Difference]: Start difference. First operand 1826 states and 5472 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 21:35:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:42,763 INFO L93 Difference]: Finished difference Result 2012 states and 5813 transitions. [2021-03-10 21:35:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:42,764 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 21:35:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:42,766 INFO L225 Difference]: With dead ends: 2012 [2021-03-10 21:35:42,766 INFO L226 Difference]: Without dead ends: 1996 [2021-03-10 21:35:42,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-03-10 21:35:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1826. [2021-03-10 21:35:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 2.9917808219178084) internal successors, (5460), 1825 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 5460 transitions. [2021-03-10 21:35:42,786 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 5460 transitions. Word has length 21 [2021-03-10 21:35:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:42,786 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 5460 transitions. [2021-03-10 21:35:42,786 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 21:35:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 5460 transitions. [2021-03-10 21:35:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:42,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:42,788 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:42,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41981 [2021-03-10 21:35:42,988 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash -437507650, now seen corresponding path program 322 times [2021-03-10 21:35:42,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:42,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200311930] [2021-03-10 21:35:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200311930] [2021-03-10 21:35:43,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202536988] [2021-03-10 21:35:43,057 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 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 21:35:43,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:43,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:43,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468897020] [2021-03-10 21:35:43,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:43,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:43,125 INFO L87 Difference]: Start difference. First operand 1826 states and 5460 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 21:35:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:43,277 INFO L93 Difference]: Finished difference Result 2184 states and 6216 transitions. [2021-03-10 21:35:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:35:43,278 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 21:35:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:43,281 INFO L225 Difference]: With dead ends: 2184 [2021-03-10 21:35:43,281 INFO L226 Difference]: Without dead ends: 2184 [2021-03-10 21:35:43,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-03-10 21:35:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1787. [2021-03-10 21:35:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.98488241881299) internal successors, (5331), 1786 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 5331 transitions. [2021-03-10 21:35:43,301 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 5331 transitions. Word has length 21 [2021-03-10 21:35:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:43,301 INFO L480 AbstractCegarLoop]: Abstraction has 1787 states and 5331 transitions. [2021-03-10 21:35:43,301 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 21:35:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 5331 transitions. [2021-03-10 21:35:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:43,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:43,302 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:43,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41982 [2021-03-10 21:35:43,503 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1172733119, now seen corresponding path program 323 times [2021-03-10 21:35:43,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:43,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692173316] [2021-03-10 21:35:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692173316] [2021-03-10 21:35:43,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158224065] [2021-03-10 21:35:43,606 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 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 21:35:43,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:43,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:43,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:43,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914306180] [2021-03-10 21:35:43,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:43,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:43,689 INFO L87 Difference]: Start difference. First operand 1787 states and 5331 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 21:35:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:43,873 INFO L93 Difference]: Finished difference Result 2056 states and 5899 transitions. [2021-03-10 21:35:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:43,874 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 21:35:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:43,876 INFO L225 Difference]: With dead ends: 2056 [2021-03-10 21:35:43,876 INFO L226 Difference]: Without dead ends: 2046 [2021-03-10 21:35:43,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-03-10 21:35:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1787. [2021-03-10 21:35:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.984322508398656) internal successors, (5330), 1786 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 5330 transitions. [2021-03-10 21:35:43,895 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 5330 transitions. Word has length 21 [2021-03-10 21:35:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:43,895 INFO L480 AbstractCegarLoop]: Abstraction has 1787 states and 5330 transitions. [2021-03-10 21:35:43,895 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 21:35:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 5330 transitions. [2021-03-10 21:35:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:43,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:43,896 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:44,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41983 [2021-03-10 21:35:44,097 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1045627288, now seen corresponding path program 324 times [2021-03-10 21:35:44,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:44,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856059132] [2021-03-10 21:35:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:44,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856059132] [2021-03-10 21:35:44,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028939318] [2021-03-10 21:35:44,168 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 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 21:35:44,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:44,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:44,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:44,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:44,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529025675] [2021-03-10 21:35:44,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:44,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:44,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:44,241 INFO L87 Difference]: Start difference. First operand 1787 states and 5330 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 21:35:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:44,473 INFO L93 Difference]: Finished difference Result 3285 states and 9471 transitions. [2021-03-10 21:35:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:44,474 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 21:35:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:44,477 INFO L225 Difference]: With dead ends: 3285 [2021-03-10 21:35:44,477 INFO L226 Difference]: Without dead ends: 3285 [2021-03-10 21:35:44,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2021-03-10 21:35:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 1833. [2021-03-10 21:35:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 2.9683406113537116) internal successors, (5438), 1832 states have internal predecessors, (5438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 5438 transitions. [2021-03-10 21:35:44,502 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 5438 transitions. Word has length 21 [2021-03-10 21:35:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:44,502 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 5438 transitions. [2021-03-10 21:35:44,502 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 21:35:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 5438 transitions. [2021-03-10 21:35:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:44,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:44,504 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:44,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41984 [2021-03-10 21:35:44,704 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash -558036613, now seen corresponding path program 325 times [2021-03-10 21:35:44,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:44,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922803811] [2021-03-10 21:35:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:44,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922803811] [2021-03-10 21:35:44,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573642540] [2021-03-10 21:35:44,790 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 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 21:35:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:44,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:44,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:44,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:44,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353698609] [2021-03-10 21:35:44,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:44,858 INFO L87 Difference]: Start difference. First operand 1833 states and 5438 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 21:35:45,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:45,013 INFO L93 Difference]: Finished difference Result 2116 states and 6032 transitions. [2021-03-10 21:35:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:45,014 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 21:35:45,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:45,016 INFO L225 Difference]: With dead ends: 2116 [2021-03-10 21:35:45,017 INFO L226 Difference]: Without dead ends: 2104 [2021-03-10 21:35:45,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-03-10 21:35:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1835. [2021-03-10 21:35:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1834 states have (on average 2.966194111232279) internal successors, (5440), 1834 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 5440 transitions. [2021-03-10 21:35:45,035 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 5440 transitions. Word has length 21 [2021-03-10 21:35:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:45,035 INFO L480 AbstractCegarLoop]: Abstraction has 1835 states and 5440 transitions. [2021-03-10 21:35:45,035 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 21:35:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 5440 transitions. [2021-03-10 21:35:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:45,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:45,037 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:45,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41985,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:45,237 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:45,237 INFO L82 PathProgramCache]: Analyzing trace with hash -221829890, now seen corresponding path program 326 times [2021-03-10 21:35:45,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:45,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325755479] [2021-03-10 21:35:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:45,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325755479] [2021-03-10 21:35:45,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932262159] [2021-03-10 21:35:45,311 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 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 21:35:45,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:45,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:45,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:45,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:45,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:45,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626605684] [2021-03-10 21:35:45,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:45,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:45,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:45,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:45,385 INFO L87 Difference]: Start difference. First operand 1835 states and 5440 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 21:35:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:45,673 INFO L93 Difference]: Finished difference Result 3310 states and 9407 transitions. [2021-03-10 21:35:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:35:45,673 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 21:35:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:45,677 INFO L225 Difference]: With dead ends: 3310 [2021-03-10 21:35:45,677 INFO L226 Difference]: Without dead ends: 3310 [2021-03-10 21:35:45,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:35:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-03-10 21:35:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 1933. [2021-03-10 21:35:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.961697722567288) internal successors, (5722), 1932 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5722 transitions. [2021-03-10 21:35:45,700 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5722 transitions. Word has length 21 [2021-03-10 21:35:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:45,700 INFO L480 AbstractCegarLoop]: Abstraction has 1933 states and 5722 transitions. [2021-03-10 21:35:45,700 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 21:35:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5722 transitions. [2021-03-10 21:35:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:45,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:45,702 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:45,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41986,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:45,902 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash 496894629, now seen corresponding path program 327 times [2021-03-10 21:35:45,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:45,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50269493] [2021-03-10 21:35:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:45,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50269493] [2021-03-10 21:35:45,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506789928] [2021-03-10 21:35:45,966 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 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 21:35:45,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:45,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:45,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:46,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:46,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:46,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726996005] [2021-03-10 21:35:46,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:46,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:46,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:46,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:46,041 INFO L87 Difference]: Start difference. First operand 1933 states and 5722 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 21:35:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:46,162 INFO L93 Difference]: Finished difference Result 2075 states and 6000 transitions. [2021-03-10 21:35:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:35:46,163 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 21:35:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:46,165 INFO L225 Difference]: With dead ends: 2075 [2021-03-10 21:35:46,165 INFO L226 Difference]: Without dead ends: 2075 [2021-03-10 21:35:46,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:35:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-03-10 21:35:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1939. [2021-03-10 21:35:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.961816305469556) internal successors, (5740), 1938 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5740 transitions. [2021-03-10 21:35:46,184 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5740 transitions. Word has length 21 [2021-03-10 21:35:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:46,184 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5740 transitions. [2021-03-10 21:35:46,184 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 21:35:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5740 transitions. [2021-03-10 21:35:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:46,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:46,186 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:46,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41987,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:46,386 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:46,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1283033832, now seen corresponding path program 328 times [2021-03-10 21:35:46,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:46,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213878166] [2021-03-10 21:35:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:46,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213878166] [2021-03-10 21:35:46,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584597677] [2021-03-10 21:35:46,446 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 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 21:35:46,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:46,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:46,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:46,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857479650] [2021-03-10 21:35:46,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:46,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:46,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:46,512 INFO L87 Difference]: Start difference. First operand 1939 states and 5740 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 21:35:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:46,719 INFO L93 Difference]: Finished difference Result 2139 states and 6051 transitions. [2021-03-10 21:35:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:46,720 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 21:35:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:46,722 INFO L225 Difference]: With dead ends: 2139 [2021-03-10 21:35:46,723 INFO L226 Difference]: Without dead ends: 2135 [2021-03-10 21:35:46,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-03-10 21:35:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1939. [2021-03-10 21:35:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.961300309597523) internal successors, (5739), 1938 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5739 transitions. [2021-03-10 21:35:46,742 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5739 transitions. Word has length 21 [2021-03-10 21:35:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:46,742 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5739 transitions. [2021-03-10 21:35:46,742 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 21:35:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5739 transitions. [2021-03-10 21:35:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:46,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:46,744 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:46,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41988,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:46,944 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash 49909311, now seen corresponding path program 329 times [2021-03-10 21:35:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366197974] [2021-03-10 21:35:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:47,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366197974] [2021-03-10 21:35:47,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057101426] [2021-03-10 21:35:47,023 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 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 21:35:47,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:47,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:47,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:47,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:47,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:47,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255634146] [2021-03-10 21:35:47,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:47,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:47,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:47,107 INFO L87 Difference]: Start difference. First operand 1939 states and 5739 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 21:35:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:47,292 INFO L93 Difference]: Finished difference Result 2180 states and 6261 transitions. [2021-03-10 21:35:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:47,293 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 21:35:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:47,296 INFO L225 Difference]: With dead ends: 2180 [2021-03-10 21:35:47,296 INFO L226 Difference]: Without dead ends: 2160 [2021-03-10 21:35:47,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-03-10 21:35:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1939. [2021-03-10 21:35:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.960268317853457) internal successors, (5737), 1938 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5737 transitions. [2021-03-10 21:35:47,317 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5737 transitions. Word has length 21 [2021-03-10 21:35:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:47,317 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5737 transitions. [2021-03-10 21:35:47,317 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 21:35:47,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5737 transitions. [2021-03-10 21:35:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:47,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:47,319 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:47,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41989 [2021-03-10 21:35:47,519 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash -77196520, now seen corresponding path program 330 times [2021-03-10 21:35:47,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:47,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748310680] [2021-03-10 21:35:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:47,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748310680] [2021-03-10 21:35:47,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141255342] [2021-03-10 21:35:47,606 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 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 21:35:47,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:47,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:47,693 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 21:35:47,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:47,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:47,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012248205] [2021-03-10 21:35:47,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:47,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:47,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:47,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:47,694 INFO L87 Difference]: Start difference. First operand 1939 states and 5737 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 21:35:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:47,956 INFO L93 Difference]: Finished difference Result 2753 states and 7805 transitions. [2021-03-10 21:35:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:47,957 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 21:35:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:47,962 INFO L225 Difference]: With dead ends: 2753 [2021-03-10 21:35:47,962 INFO L226 Difference]: Without dead ends: 2753 [2021-03-10 21:35:47,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:35:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-03-10 21:35:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2090. [2021-03-10 21:35:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 2.9664911440880806) internal successors, (6197), 2089 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 21:35:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 6197 transitions. [2021-03-10 21:35:47,992 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 6197 transitions. Word has length 21 [2021-03-10 21:35:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:47,992 INFO L480 AbstractCegarLoop]: Abstraction has 2090 states and 6197 transitions. [2021-03-10 21:35:47,992 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 21:35:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 6197 transitions. [2021-03-10 21:35:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:47,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:47,994 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:48,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41990 [2021-03-10 21:35:48,194 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:48,195 INFO L82 PathProgramCache]: Analyzing trace with hash -586557543, now seen corresponding path program 331 times [2021-03-10 21:35:48,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:48,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133613736] [2021-03-10 21:35:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:48,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133613736] [2021-03-10 21:35:48,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762437034] [2021-03-10 21:35:48,274 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 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 21:35:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:48,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:48,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:48,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:48,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:48,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425152490] [2021-03-10 21:35:48,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:48,344 INFO L87 Difference]: Start difference. First operand 2090 states and 6197 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 21:35:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:48,571 INFO L93 Difference]: Finished difference Result 2406 states and 6903 transitions. [2021-03-10 21:35:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:35:48,572 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 21:35:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:48,575 INFO L225 Difference]: With dead ends: 2406 [2021-03-10 21:35:48,575 INFO L226 Difference]: Without dead ends: 2386 [2021-03-10 21:35:48,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:35:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-03-10 21:35:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2090. [2021-03-10 21:35:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 2.9621828626136906) internal successors, (6188), 2089 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 6188 transitions. [2021-03-10 21:35:48,599 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 6188 transitions. Word has length 21 [2021-03-10 21:35:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:48,599 INFO L480 AbstractCegarLoop]: Abstraction has 2090 states and 6188 transitions. [2021-03-10 21:35:48,599 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 21:35:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 6188 transitions. [2021-03-10 21:35:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:48,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:48,601 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:48,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41991 [2021-03-10 21:35:48,801 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash -713663374, now seen corresponding path program 332 times [2021-03-10 21:35:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:48,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002349088] [2021-03-10 21:35:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002349088] [2021-03-10 21:35:48,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593884152] [2021-03-10 21:35:48,877 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 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 21:35:48,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:48,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:48,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:48,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:48,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919604148] [2021-03-10 21:35:48,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:48,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:48,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:48,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:48,952 INFO L87 Difference]: Start difference. First operand 2090 states and 6188 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 21:35:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:49,157 INFO L93 Difference]: Finished difference Result 2696 states and 7663 transitions. [2021-03-10 21:35:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:35:49,158 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 21:35:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:49,161 INFO L225 Difference]: With dead ends: 2696 [2021-03-10 21:35:49,161 INFO L226 Difference]: Without dead ends: 2696 [2021-03-10 21:35:49,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-03-10 21:35:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1928. [2021-03-10 21:35:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.9740529320186817) internal successors, (5731), 1927 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 5731 transitions. [2021-03-10 21:35:49,183 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 5731 transitions. Word has length 21 [2021-03-10 21:35:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:49,183 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 5731 transitions. [2021-03-10 21:35:49,183 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 21:35:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 5731 transitions. [2021-03-10 21:35:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:49,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:49,184 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:49,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41992 [2021-03-10 21:35:49,385 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1977640021, now seen corresponding path program 333 times [2021-03-10 21:35:49,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:49,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62193683] [2021-03-10 21:35:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:49,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62193683] [2021-03-10 21:35:49,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501368245] [2021-03-10 21:35:49,464 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 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 21:35:49,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:35:49,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:49,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:49,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:49,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:49,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823999820] [2021-03-10 21:35:49,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:49,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:49,532 INFO L87 Difference]: Start difference. First operand 1928 states and 5731 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 21:35:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:49,688 INFO L93 Difference]: Finished difference Result 2299 states and 6540 transitions. [2021-03-10 21:35:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:49,689 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 21:35:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:49,692 INFO L225 Difference]: With dead ends: 2299 [2021-03-10 21:35:49,692 INFO L226 Difference]: Without dead ends: 2287 [2021-03-10 21:35:49,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-03-10 21:35:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1939. [2021-03-10 21:35:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9669762641898867) internal successors, (5750), 1938 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5750 transitions. [2021-03-10 21:35:49,714 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5750 transitions. Word has length 21 [2021-03-10 21:35:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:49,714 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5750 transitions. [2021-03-10 21:35:49,714 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 21:35:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5750 transitions. [2021-03-10 21:35:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:49,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:49,716 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:49,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41993,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:49,916 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:49,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1981120552, now seen corresponding path program 334 times [2021-03-10 21:35:49,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:49,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003038407] [2021-03-10 21:35:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:49,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003038407] [2021-03-10 21:35:49,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782026580] [2021-03-10 21:35:49,996 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 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 21:35:50,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:50,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:50,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:50,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086851867] [2021-03-10 21:35:50,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:50,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:50,067 INFO L87 Difference]: Start difference. First operand 1939 states and 5750 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 21:35:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:50,374 INFO L93 Difference]: Finished difference Result 3078 states and 8725 transitions. [2021-03-10 21:35:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:50,375 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 21:35:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:50,378 INFO L225 Difference]: With dead ends: 3078 [2021-03-10 21:35:50,378 INFO L226 Difference]: Without dead ends: 3078 [2021-03-10 21:35:50,378 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:35:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-03-10 21:35:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1869. [2021-03-10 21:35:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.962526766595289) internal successors, (5534), 1868 states have internal predecessors, (5534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5534 transitions. [2021-03-10 21:35:50,401 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5534 transitions. Word has length 21 [2021-03-10 21:35:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:50,401 INFO L480 AbstractCegarLoop]: Abstraction has 1869 states and 5534 transitions. [2021-03-10 21:35:50,401 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 21:35:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5534 transitions. [2021-03-10 21:35:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:50,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:50,403 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:50,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41994 [2021-03-10 21:35:50,603 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:50,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:50,604 INFO L82 PathProgramCache]: Analyzing trace with hash 643452475, now seen corresponding path program 335 times [2021-03-10 21:35:50,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:50,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48679111] [2021-03-10 21:35:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48679111] [2021-03-10 21:35:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565739768] [2021-03-10 21:35:50,658 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 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 21:35:50,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:50,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:50,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:50,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:50,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:50,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157421590] [2021-03-10 21:35:50,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:50,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:50,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:50,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:50,732 INFO L87 Difference]: Start difference. First operand 1869 states and 5534 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 21:35:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:50,814 INFO L93 Difference]: Finished difference Result 2189 states and 6149 transitions. [2021-03-10 21:35:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:35:50,815 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 21:35:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:50,817 INFO L225 Difference]: With dead ends: 2189 [2021-03-10 21:35:50,817 INFO L226 Difference]: Without dead ends: 2189 [2021-03-10 21:35:50,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-03-10 21:35:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1893. [2021-03-10 21:35:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.973572938689218) internal successors, (5626), 1892 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5626 transitions. [2021-03-10 21:35:50,837 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5626 transitions. Word has length 21 [2021-03-10 21:35:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:50,837 INFO L480 AbstractCegarLoop]: Abstraction has 1893 states and 5626 transitions. [2021-03-10 21:35:50,837 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 21:35:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5626 transitions. [2021-03-10 21:35:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:50,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:50,851 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:51,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41995,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:51,052 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash 724582760, now seen corresponding path program 336 times [2021-03-10 21:35:51,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:51,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536826162] [2021-03-10 21:35:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:51,099 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 21:35:51,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536826162] [2021-03-10 21:35:51,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535967481] [2021-03-10 21:35:51,100 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 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 21:35:51,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:51,166 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 21:35:51,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:51,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:35:51,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368018226] [2021-03-10 21:35:51,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:51,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:51,166 INFO L87 Difference]: Start difference. First operand 1893 states and 5626 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 21:35:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:51,373 INFO L93 Difference]: Finished difference Result 2064 states and 5907 transitions. [2021-03-10 21:35:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:35:51,374 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 21:35:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:51,377 INFO L225 Difference]: With dead ends: 2064 [2021-03-10 21:35:51,377 INFO L226 Difference]: Without dead ends: 2062 [2021-03-10 21:35:51,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-03-10 21:35:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1904. [2021-03-10 21:35:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.975302154492906) internal successors, (5662), 1903 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5662 transitions. [2021-03-10 21:35:51,406 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5662 transitions. Word has length 21 [2021-03-10 21:35:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:51,406 INFO L480 AbstractCegarLoop]: Abstraction has 1904 states and 5662 transitions. [2021-03-10 21:35:51,407 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 21:35:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5662 transitions. [2021-03-10 21:35:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:51,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:51,409 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:51,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41996,345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:51,615 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -587477573, now seen corresponding path program 337 times [2021-03-10 21:35:51,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:51,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608645925] [2021-03-10 21:35:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:51,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608645925] [2021-03-10 21:35:51,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976997904] [2021-03-10 21:35:51,695 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 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 21:35:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:51,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:51,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:51,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:35:51,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652250521] [2021-03-10 21:35:51,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:51,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:51,775 INFO L87 Difference]: Start difference. First operand 1904 states and 5662 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 21:35:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:52,007 INFO L93 Difference]: Finished difference Result 2199 states and 6178 transitions. [2021-03-10 21:35:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:52,008 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 21:35:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:52,011 INFO L225 Difference]: With dead ends: 2199 [2021-03-10 21:35:52,011 INFO L226 Difference]: Without dead ends: 2169 [2021-03-10 21:35:52,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-03-10 21:35:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1904. [2021-03-10 21:35:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.9642669469259064) internal successors, (5641), 1903 states have internal predecessors, (5641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5641 transitions. [2021-03-10 21:35:52,032 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5641 transitions. Word has length 21 [2021-03-10 21:35:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:52,032 INFO L480 AbstractCegarLoop]: Abstraction has 1904 states and 5641 transitions. [2021-03-10 21:35:52,032 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 21:35:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5641 transitions. [2021-03-10 21:35:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:52,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:52,034 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:52,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41997,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:52,234 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1157806463, now seen corresponding path program 338 times [2021-03-10 21:35:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:52,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248169632] [2021-03-10 21:35:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:52,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248169632] [2021-03-10 21:35:52,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133307906] [2021-03-10 21:35:52,315 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 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 21:35:52,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:52,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:52,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:52,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:52,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314095542] [2021-03-10 21:35:52,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:52,390 INFO L87 Difference]: Start difference. First operand 1904 states and 5641 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 21:35:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:52,619 INFO L93 Difference]: Finished difference Result 2131 states and 6054 transitions. [2021-03-10 21:35:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:52,620 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 21:35:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:52,622 INFO L225 Difference]: With dead ends: 2131 [2021-03-10 21:35:52,622 INFO L226 Difference]: Without dead ends: 2111 [2021-03-10 21:35:52,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-03-10 21:35:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1906. [2021-03-10 21:35:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 2.95748031496063) internal successors, (5634), 1905 states have internal predecessors, (5634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 5634 transitions. [2021-03-10 21:35:52,641 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 5634 transitions. Word has length 21 [2021-03-10 21:35:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:52,641 INFO L480 AbstractCegarLoop]: Abstraction has 1906 states and 5634 transitions. [2021-03-10 21:35:52,641 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 21:35:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 5634 transitions. [2021-03-10 21:35:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:52,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:52,643 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:52,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41998,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:52,843 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1030700632, now seen corresponding path program 339 times [2021-03-10 21:35:52,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:52,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529515262] [2021-03-10 21:35:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:52,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529515262] [2021-03-10 21:35:52,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642131748] [2021-03-10 21:35:52,933 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 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 21:35:52,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:35:52,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:52,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:53,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:53,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:53,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272946260] [2021-03-10 21:35:53,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:53,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:53,030 INFO L87 Difference]: Start difference. First operand 1906 states and 5634 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 21:35:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:53,229 INFO L93 Difference]: Finished difference Result 2236 states and 6295 transitions. [2021-03-10 21:35:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:35:53,229 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 21:35:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:53,232 INFO L225 Difference]: With dead ends: 2236 [2021-03-10 21:35:53,232 INFO L226 Difference]: Without dead ends: 2236 [2021-03-10 21:35:53,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-03-10 21:35:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1396. [2021-03-10 21:35:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 2.8982078853046596) internal successors, (4043), 1395 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 21:35:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4043 transitions. [2021-03-10 21:35:53,247 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4043 transitions. Word has length 21 [2021-03-10 21:35:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:53,248 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4043 transitions. [2021-03-10 21:35:53,248 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 21:35:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4043 transitions. [2021-03-10 21:35:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:53,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:53,249 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:53,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41999,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:53,449 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash -572963269, now seen corresponding path program 340 times [2021-03-10 21:35:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:53,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383412483] [2021-03-10 21:35:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:53,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383412483] [2021-03-10 21:35:53,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166970655] [2021-03-10 21:35:53,535 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 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 21:35:53,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:53,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:53,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:53,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:53,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:53,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972936853] [2021-03-10 21:35:53,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:53,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:53,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:53,613 INFO L87 Difference]: Start difference. First operand 1396 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 21:35:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:53,770 INFO L93 Difference]: Finished difference Result 1832 states and 5001 transitions. [2021-03-10 21:35:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:53,771 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 21:35:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:53,773 INFO L225 Difference]: With dead ends: 1832 [2021-03-10 21:35:53,773 INFO L226 Difference]: Without dead ends: 1820 [2021-03-10 21:35:53,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-03-10 21:35:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1398. [2021-03-10 21:35:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.8976377952755907) internal successors, (4048), 1397 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4048 transitions. [2021-03-10 21:35:53,787 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4048 transitions. Word has length 21 [2021-03-10 21:35:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:53,787 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4048 transitions. [2021-03-10 21:35:53,787 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 21:35:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4048 transitions. [2021-03-10 21:35:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:53,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:53,788 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:53,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42000,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:53,989 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash -236756546, now seen corresponding path program 341 times [2021-03-10 21:35:53,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:53,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011668380] [2021-03-10 21:35:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:54,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011668380] [2021-03-10 21:35:54,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666961095] [2021-03-10 21:35:54,067 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 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 21:35:54,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:54,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:54,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:54,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:54,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270162131] [2021-03-10 21:35:54,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:54,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:54,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:54,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:54,149 INFO L87 Difference]: Start difference. First operand 1398 states and 4048 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 21:35:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:54,419 INFO L93 Difference]: Finished difference Result 2345 states and 6466 transitions. [2021-03-10 21:35:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:54,420 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 21:35:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:54,422 INFO L225 Difference]: With dead ends: 2345 [2021-03-10 21:35:54,422 INFO L226 Difference]: Without dead ends: 2345 [2021-03-10 21:35:54,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:35:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-03-10 21:35:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1680. [2021-03-10 21:35:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 2.92078618225134) internal successors, (4904), 1679 states have internal predecessors, (4904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 4904 transitions. [2021-03-10 21:35:54,441 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 4904 transitions. Word has length 21 [2021-03-10 21:35:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:54,441 INFO L480 AbstractCegarLoop]: Abstraction has 1680 states and 4904 transitions. [2021-03-10 21:35:54,441 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 21:35:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 4904 transitions. [2021-03-10 21:35:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:54,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:54,443 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:54,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42001 [2021-03-10 21:35:54,643 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:54,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1607749887, now seen corresponding path program 342 times [2021-03-10 21:35:54,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:54,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081195677] [2021-03-10 21:35:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:54,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081195677] [2021-03-10 21:35:54,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235599196] [2021-03-10 21:35:54,733 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 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 21:35:54,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:54,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:54,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:54,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741152517] [2021-03-10 21:35:54,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:54,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:54,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:54,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:54,815 INFO L87 Difference]: Start difference. First operand 1680 states and 4904 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 21:35:54,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:54,967 INFO L93 Difference]: Finished difference Result 2117 states and 5870 transitions. [2021-03-10 21:35:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:54,968 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 21:35:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:54,970 INFO L225 Difference]: With dead ends: 2117 [2021-03-10 21:35:54,970 INFO L226 Difference]: Without dead ends: 2103 [2021-03-10 21:35:54,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-03-10 21:35:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1695. [2021-03-10 21:35:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 2.9126328217237307) internal successors, (4934), 1694 states have internal predecessors, (4934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 4934 transitions. [2021-03-10 21:35:54,990 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 4934 transitions. Word has length 21 [2021-03-10 21:35:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:54,990 INFO L480 AbstractCegarLoop]: Abstraction has 1695 states and 4934 transitions. [2021-03-10 21:35:54,990 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 21:35:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 4934 transitions. [2021-03-10 21:35:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:54,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:54,991 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:55,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42002 [2021-03-10 21:35:55,192 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash -873223400, now seen corresponding path program 343 times [2021-03-10 21:35:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:55,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012327067] [2021-03-10 21:35:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:55,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012327067] [2021-03-10 21:35:55,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509206851] [2021-03-10 21:35:55,278 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 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 21:35:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:55,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:55,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:55,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944957437] [2021-03-10 21:35:55,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:55,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:55,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:55,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:55,357 INFO L87 Difference]: Start difference. First operand 1695 states and 4934 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 21:35:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:55,792 INFO L93 Difference]: Finished difference Result 2871 states and 7976 transitions. [2021-03-10 21:35:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:35:55,793 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 21:35:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:55,796 INFO L225 Difference]: With dead ends: 2871 [2021-03-10 21:35:55,796 INFO L226 Difference]: Without dead ends: 2871 [2021-03-10 21:35:55,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:35:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-03-10 21:35:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2029. [2021-03-10 21:35:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.9225838264299804) internal successors, (5927), 2028 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5927 transitions. [2021-03-10 21:35:55,820 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5927 transitions. Word has length 21 [2021-03-10 21:35:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:55,821 INFO L480 AbstractCegarLoop]: Abstraction has 2029 states and 5927 transitions. [2021-03-10 21:35:55,821 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 21:35:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5927 transitions. [2021-03-10 21:35:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:55,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:55,822 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:56,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42003,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:56,023 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1793458955, now seen corresponding path program 344 times [2021-03-10 21:35:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:56,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328605133] [2021-03-10 21:35:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:56,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328605133] [2021-03-10 21:35:56,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611835229] [2021-03-10 21:35:56,112 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 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 21:35:56,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:56,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:56,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:56,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:56,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:56,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:56,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633969231] [2021-03-10 21:35:56,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:56,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:56,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:56,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:56,205 INFO L87 Difference]: Start difference. First operand 2029 states and 5927 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 21:35:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:56,341 INFO L93 Difference]: Finished difference Result 2314 states and 6501 transitions. [2021-03-10 21:35:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:56,342 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 21:35:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:56,344 INFO L225 Difference]: With dead ends: 2314 [2021-03-10 21:35:56,344 INFO L226 Difference]: Without dead ends: 2314 [2021-03-10 21:35:56,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-03-10 21:35:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2078. [2021-03-10 21:35:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 2.934520943668753) internal successors, (6095), 2077 states have internal predecessors, (6095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 6095 transitions. [2021-03-10 21:35:56,366 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 6095 transitions. Word has length 21 [2021-03-10 21:35:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:56,367 INFO L480 AbstractCegarLoop]: Abstraction has 2078 states and 6095 transitions. [2021-03-10 21:35:56,367 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 21:35:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 6095 transitions. [2021-03-10 21:35:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:56,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:56,368 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:56,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42004 [2021-03-10 21:35:56,569 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash 13530494, now seen corresponding path program 345 times [2021-03-10 21:35:56,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:56,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028167599] [2021-03-10 21:35:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:56,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028167599] [2021-03-10 21:35:56,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094231603] [2021-03-10 21:35:56,636 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 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 21:35:56,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:35:56,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:56,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:56,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:35:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647160268] [2021-03-10 21:35:56,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:56,706 INFO L87 Difference]: Start difference. First operand 2078 states and 6095 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 21:35:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:56,956 INFO L93 Difference]: Finished difference Result 2345 states and 6555 transitions. [2021-03-10 21:35:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:35:56,957 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 21:35:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:56,959 INFO L225 Difference]: With dead ends: 2345 [2021-03-10 21:35:56,960 INFO L226 Difference]: Without dead ends: 2341 [2021-03-10 21:35:56,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:35:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-03-10 21:35:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2097. [2021-03-10 21:35:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 2.940362595419847) internal successors, (6163), 2096 states have internal predecessors, (6163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 6163 transitions. [2021-03-10 21:35:56,981 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 6163 transitions. Word has length 21 [2021-03-10 21:35:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:56,981 INFO L480 AbstractCegarLoop]: Abstraction has 2097 states and 6163 transitions. [2021-03-10 21:35:56,981 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 21:35:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 6163 transitions. [2021-03-10 21:35:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:56,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:56,983 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:57,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42005 [2021-03-10 21:35:57,183 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:57,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2115307227, now seen corresponding path program 346 times [2021-03-10 21:35:57,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:57,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314189038] [2021-03-10 21:35:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:57,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314189038] [2021-03-10 21:35:57,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561340650] [2021-03-10 21:35:57,243 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 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 21:35:57,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:57,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:57,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:57,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354596913] [2021-03-10 21:35:57,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:57,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:57,311 INFO L87 Difference]: Start difference. First operand 2097 states and 6163 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 21:35:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:57,480 INFO L93 Difference]: Finished difference Result 2290 states and 6497 transitions. [2021-03-10 21:35:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:57,481 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 21:35:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:57,484 INFO L225 Difference]: With dead ends: 2290 [2021-03-10 21:35:57,484 INFO L226 Difference]: Without dead ends: 2288 [2021-03-10 21:35:57,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-03-10 21:35:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2097. [2021-03-10 21:35:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 2.939885496183206) internal successors, (6162), 2096 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 6162 transitions. [2021-03-10 21:35:57,509 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 6162 transitions. Word has length 21 [2021-03-10 21:35:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:57,509 INFO L480 AbstractCegarLoop]: Abstraction has 2097 states and 6162 transitions. [2021-03-10 21:35:57,509 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 21:35:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 6162 transitions. [2021-03-10 21:35:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:57,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:57,511 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:57,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42006 [2021-03-10 21:35:57,711 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:57,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1518396286, now seen corresponding path program 347 times [2021-03-10 21:35:57,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:57,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537651828] [2021-03-10 21:35:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:57,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537651828] [2021-03-10 21:35:57,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797962626] [2021-03-10 21:35:57,773 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 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 21:35:57,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:57,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:57,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:57,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:57,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:35:57,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550212427] [2021-03-10 21:35:57,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:57,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:57,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:57,860 INFO L87 Difference]: Start difference. First operand 2097 states and 6162 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 21:35:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:57,952 INFO L93 Difference]: Finished difference Result 2399 states and 6708 transitions. [2021-03-10 21:35:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:35:57,953 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 21:35:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:57,955 INFO L225 Difference]: With dead ends: 2399 [2021-03-10 21:35:57,955 INFO L226 Difference]: Without dead ends: 2399 [2021-03-10 21:35:57,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-03-10 21:35:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2087. [2021-03-10 21:35:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 2.934803451581975) internal successors, (6122), 2086 states have internal predecessors, (6122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 6122 transitions. [2021-03-10 21:35:57,976 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 6122 transitions. Word has length 21 [2021-03-10 21:35:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:57,976 INFO L480 AbstractCegarLoop]: Abstraction has 2087 states and 6122 transitions. [2021-03-10 21:35:57,976 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 21:35:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 6122 transitions. [2021-03-10 21:35:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:57,978 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:57,978 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:58,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42007,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:58,178 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:58,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1020762949, now seen corresponding path program 348 times [2021-03-10 21:35:58,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:58,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929194404] [2021-03-10 21:35:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929194404] [2021-03-10 21:35:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719130185] [2021-03-10 21:35:58,259 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 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 21:35:58,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:58,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:58,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:58,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:58,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:58,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053598192] [2021-03-10 21:35:58,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:58,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:58,335 INFO L87 Difference]: Start difference. First operand 2087 states and 6122 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 21:35:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:58,513 INFO L93 Difference]: Finished difference Result 2394 states and 6802 transitions. [2021-03-10 21:35:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:58,514 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 21:35:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:58,517 INFO L225 Difference]: With dead ends: 2394 [2021-03-10 21:35:58,517 INFO L226 Difference]: Without dead ends: 2382 [2021-03-10 21:35:58,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-03-10 21:35:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2087. [2021-03-10 21:35:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 2.9338446788111217) internal successors, (6120), 2086 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 6120 transitions. [2021-03-10 21:35:58,541 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 6120 transitions. Word has length 21 [2021-03-10 21:35:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:58,541 INFO L480 AbstractCegarLoop]: Abstraction has 2087 states and 6120 transitions. [2021-03-10 21:35:58,541 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 21:35:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 6120 transitions. [2021-03-10 21:35:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:58,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:58,543 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:58,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42008,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:58,743 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash -684556226, now seen corresponding path program 349 times [2021-03-10 21:35:58,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:58,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676490459] [2021-03-10 21:35:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:58,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676490459] [2021-03-10 21:35:58,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779961348] [2021-03-10 21:35:58,827 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 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 21:35:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:58,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:58,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:35:58,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259620803] [2021-03-10 21:35:58,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:58,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:58,898 INFO L87 Difference]: Start difference. First operand 2087 states and 6120 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 21:35:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:59,183 INFO L93 Difference]: Finished difference Result 2726 states and 7651 transitions. [2021-03-10 21:35:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:35:59,184 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 21:35:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:59,187 INFO L225 Difference]: With dead ends: 2726 [2021-03-10 21:35:59,187 INFO L226 Difference]: Without dead ends: 2726 [2021-03-10 21:35:59,187 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:35:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-03-10 21:35:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2204. [2021-03-10 21:35:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 2.938719927371766) internal successors, (6474), 2203 states have internal predecessors, (6474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 6474 transitions. [2021-03-10 21:35:59,211 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 6474 transitions. Word has length 21 [2021-03-10 21:35:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:59,211 INFO L480 AbstractCegarLoop]: Abstraction has 2204 states and 6474 transitions. [2021-03-10 21:35:59,211 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 21:35:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 6474 transitions. [2021-03-10 21:35:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:59,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:59,212 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:59,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42009,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:59,413 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 723601057, now seen corresponding path program 350 times [2021-03-10 21:35:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:59,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463154113] [2021-03-10 21:35:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:59,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463154113] [2021-03-10 21:35:59,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113631393] [2021-03-10 21:35:59,493 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 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 21:35:59,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:35:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:59,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:59,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:35:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243243040] [2021-03-10 21:35:59,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:59,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:59,579 INFO L87 Difference]: Start difference. First operand 2204 states and 6474 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 21:35:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:59,806 INFO L93 Difference]: Finished difference Result 2582 states and 7346 transitions. [2021-03-10 21:35:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:59,807 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 21:35:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:59,810 INFO L225 Difference]: With dead ends: 2582 [2021-03-10 21:35:59,810 INFO L226 Difference]: Without dead ends: 2570 [2021-03-10 21:35:59,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-03-10 21:35:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2204. [2021-03-10 21:35:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 2.9355424421243757) internal successors, (6467), 2203 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 6467 transitions. [2021-03-10 21:35:59,832 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 6467 transitions. Word has length 21 [2021-03-10 21:35:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:59,832 INFO L480 AbstractCegarLoop]: Abstraction has 2204 states and 6467 transitions. [2021-03-10 21:35:59,833 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 21:35:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 6467 transitions. [2021-03-10 21:35:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:59,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:59,834 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:00,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42010 [2021-03-10 21:36:00,035 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:00,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1059807780, now seen corresponding path program 351 times [2021-03-10 21:36:00,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:00,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014105792] [2021-03-10 21:36:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:00,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014105792] [2021-03-10 21:36:00,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326277241] [2021-03-10 21:36:00,136 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 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 21:36:00,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:36:00,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:00,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:00,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:00,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504528857] [2021-03-10 21:36:00,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:00,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:00,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:00,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:00,232 INFO L87 Difference]: Start difference. First operand 2204 states and 6467 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 21:36:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:00,532 INFO L93 Difference]: Finished difference Result 2679 states and 7569 transitions. [2021-03-10 21:36:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:00,533 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 21:36:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:00,536 INFO L225 Difference]: With dead ends: 2679 [2021-03-10 21:36:00,536 INFO L226 Difference]: Without dead ends: 2679 [2021-03-10 21:36:00,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:36:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-03-10 21:36:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1537. [2021-03-10 21:36:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 2.9095052083333335) internal successors, (4469), 1536 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4469 transitions. [2021-03-10 21:36:00,560 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4469 transitions. Word has length 21 [2021-03-10 21:36:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:00,560 INFO L480 AbstractCegarLoop]: Abstraction has 1537 states and 4469 transitions. [2021-03-10 21:36:00,561 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 21:36:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4469 transitions. [2021-03-10 21:36:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:00,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:00,562 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:00,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42011,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:00,762 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1390653083, now seen corresponding path program 352 times [2021-03-10 21:36:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598239971] [2021-03-10 21:36:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598239971] [2021-03-10 21:36:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455085636] [2021-03-10 21:36:00,853 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 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 21:36:00,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:00,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:00,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:00,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:00,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:00,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851258265] [2021-03-10 21:36:00,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:00,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:00,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:00,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:00,935 INFO L87 Difference]: Start difference. First operand 1537 states and 4469 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 21:36:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:01,103 INFO L93 Difference]: Finished difference Result 2028 states and 5565 transitions. [2021-03-10 21:36:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:36:01,104 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 21:36:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:01,106 INFO L225 Difference]: With dead ends: 2028 [2021-03-10 21:36:01,106 INFO L226 Difference]: Without dead ends: 2014 [2021-03-10 21:36:01,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:36:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-03-10 21:36:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1554. [2021-03-10 21:36:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.900193174500966) internal successors, (4504), 1553 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4504 transitions. [2021-03-10 21:36:01,124 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4504 transitions. Word has length 21 [2021-03-10 21:36:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:01,124 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4504 transitions. [2021-03-10 21:36:01,124 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 21:36:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4504 transitions. [2021-03-10 21:36:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:01,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:01,125 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:01,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42012 [2021-03-10 21:36:01,325 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash 423340926, now seen corresponding path program 353 times [2021-03-10 21:36:01,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:01,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597903099] [2021-03-10 21:36:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:01,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597903099] [2021-03-10 21:36:01,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674349530] [2021-03-10 21:36:01,409 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 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 21:36:01,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:01,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:01,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:01,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:01,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511629112] [2021-03-10 21:36:01,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:01,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:01,493 INFO L87 Difference]: Start difference. First operand 1554 states and 4504 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 21:36:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:01,855 INFO L93 Difference]: Finished difference Result 2336 states and 6414 transitions. [2021-03-10 21:36:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:36:01,856 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 21:36:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:01,859 INFO L225 Difference]: With dead ends: 2336 [2021-03-10 21:36:01,859 INFO L226 Difference]: Without dead ends: 2336 [2021-03-10 21:36:01,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:36:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-03-10 21:36:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1497. [2021-03-10 21:36:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.8970588235294117) internal successors, (4334), 1496 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 4334 transitions. [2021-03-10 21:36:01,875 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 4334 transitions. Word has length 21 [2021-03-10 21:36:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:01,876 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 4334 transitions. [2021-03-10 21:36:01,876 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 21:36:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 4334 transitions. [2021-03-10 21:36:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:01,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:01,877 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:02,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42013,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:02,077 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash 180726139, now seen corresponding path program 354 times [2021-03-10 21:36:02,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:02,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106617921] [2021-03-10 21:36:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106617921] [2021-03-10 21:36:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403790116] [2021-03-10 21:36:02,137 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 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 21:36:02,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:02,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:02,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:02,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:36:02,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371006443] [2021-03-10 21:36:02,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:02,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:02,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:02,215 INFO L87 Difference]: Start difference. First operand 1497 states and 4334 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 21:36:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:02,317 INFO L93 Difference]: Finished difference Result 2050 states and 5598 transitions. [2021-03-10 21:36:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:36:02,318 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 21:36:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:02,320 INFO L225 Difference]: With dead ends: 2050 [2021-03-10 21:36:02,320 INFO L226 Difference]: Without dead ends: 2050 [2021-03-10 21:36:02,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-03-10 21:36:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1687. [2021-03-10 21:36:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.9395017793594307) internal successors, (4956), 1686 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4956 transitions. [2021-03-10 21:36:02,339 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4956 transitions. Word has length 21 [2021-03-10 21:36:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:02,339 INFO L480 AbstractCegarLoop]: Abstraction has 1687 states and 4956 transitions. [2021-03-10 21:36:02,339 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 21:36:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4956 transitions. [2021-03-10 21:36:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:02,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:02,341 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:02,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42014 [2021-03-10 21:36:02,541 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 261856424, now seen corresponding path program 355 times [2021-03-10 21:36:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581247896] [2021-03-10 21:36:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:02,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581247896] [2021-03-10 21:36:02,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86708647] [2021-03-10 21:36:02,597 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 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 21:36:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:02,664 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 21:36:02,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:02,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:36:02,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379287922] [2021-03-10 21:36:02,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:02,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:02,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:02,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:02,664 INFO L87 Difference]: Start difference. First operand 1687 states and 4956 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 21:36:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:02,861 INFO L93 Difference]: Finished difference Result 1917 states and 5347 transitions. [2021-03-10 21:36:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:02,862 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 21:36:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:02,864 INFO L225 Difference]: With dead ends: 1917 [2021-03-10 21:36:02,864 INFO L226 Difference]: Without dead ends: 1915 [2021-03-10 21:36:02,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:36:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-03-10 21:36:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1706. [2021-03-10 21:36:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.947800586510264) internal successors, (5026), 1705 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5026 transitions. [2021-03-10 21:36:02,881 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5026 transitions. Word has length 21 [2021-03-10 21:36:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:02,881 INFO L480 AbstractCegarLoop]: Abstraction has 1706 states and 5026 transitions. [2021-03-10 21:36:02,881 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 21:36:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5026 transitions. [2021-03-10 21:36:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:02,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:02,882 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:03,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42015 [2021-03-10 21:36:03,083 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:03,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1775453631, now seen corresponding path program 356 times [2021-03-10 21:36:03,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:03,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591091821] [2021-03-10 21:36:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:03,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591091821] [2021-03-10 21:36:03,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470026136] [2021-03-10 21:36:03,142 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 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 21:36:03,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:03,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:03,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:03,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:36:03,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285465350] [2021-03-10 21:36:03,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:03,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:03,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:03,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:03,211 INFO L87 Difference]: Start difference. First operand 1706 states and 5026 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 21:36:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:03,401 INFO L93 Difference]: Finished difference Result 2043 states and 5618 transitions. [2021-03-10 21:36:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:03,402 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 21:36:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:03,404 INFO L225 Difference]: With dead ends: 2043 [2021-03-10 21:36:03,404 INFO L226 Difference]: Without dead ends: 2041 [2021-03-10 21:36:03,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:36:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-03-10 21:36:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1706. [2021-03-10 21:36:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.9472140762463344) internal successors, (5025), 1705 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5025 transitions. [2021-03-10 21:36:03,421 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5025 transitions. Word has length 21 [2021-03-10 21:36:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:03,421 INFO L480 AbstractCegarLoop]: Abstraction has 1706 states and 5025 transitions. [2021-03-10 21:36:03,421 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 21:36:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5025 transitions. [2021-03-10 21:36:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:03,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:03,423 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:03,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42016 [2021-03-10 21:36:03,623 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:03,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1114189848, now seen corresponding path program 357 times [2021-03-10 21:36:03,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:03,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132544503] [2021-03-10 21:36:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:03,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132544503] [2021-03-10 21:36:03,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279312600] [2021-03-10 21:36:03,684 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 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 21:36:03,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:36:03,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:03,761 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 21:36:03,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:03,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:36:03,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384847635] [2021-03-10 21:36:03,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:03,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:03,762 INFO L87 Difference]: Start difference. First operand 1706 states and 5025 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 21:36:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:03,902 INFO L93 Difference]: Finished difference Result 1983 states and 5517 transitions. [2021-03-10 21:36:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:36:03,903 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 21:36:03,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:03,906 INFO L225 Difference]: With dead ends: 1983 [2021-03-10 21:36:03,906 INFO L226 Difference]: Without dead ends: 1983 [2021-03-10 21:36:03,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:36:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-03-10 21:36:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1686. [2021-03-10 21:36:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.940652818991098) internal successors, (4955), 1685 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4955 transitions. [2021-03-10 21:36:03,925 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4955 transitions. Word has length 21 [2021-03-10 21:36:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:03,925 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 4955 transitions. [2021-03-10 21:36:03,925 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 21:36:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4955 transitions. [2021-03-10 21:36:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:03,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:03,927 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:04,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42017 [2021-03-10 21:36:04,127 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:04,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1875263, now seen corresponding path program 358 times [2021-03-10 21:36:04,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:04,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926029857] [2021-03-10 21:36:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:04,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926029857] [2021-03-10 21:36:04,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331009734] [2021-03-10 21:36:04,197 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 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 21:36:04,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:04,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:04,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:04,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:04,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:04,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609526450] [2021-03-10 21:36:04,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:04,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:04,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:04,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:04,268 INFO L87 Difference]: Start difference. First operand 1686 states and 4955 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 21:36:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:04,453 INFO L93 Difference]: Finished difference Result 2027 states and 5611 transitions. [2021-03-10 21:36:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:04,453 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 21:36:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:04,455 INFO L225 Difference]: With dead ends: 2027 [2021-03-10 21:36:04,455 INFO L226 Difference]: Without dead ends: 2017 [2021-03-10 21:36:04,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-03-10 21:36:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1712. [2021-03-10 21:36:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 2.950905902980713) internal successors, (5049), 1711 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 5049 transitions. [2021-03-10 21:36:04,481 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 5049 transitions. Word has length 21 [2021-03-10 21:36:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:04,482 INFO L480 AbstractCegarLoop]: Abstraction has 1712 states and 5049 transitions. [2021-03-10 21:36:04,482 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 21:36:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 5049 transitions. [2021-03-10 21:36:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:04,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:04,483 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:04,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42018,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:04,683 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:04,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1050203909, now seen corresponding path program 359 times [2021-03-10 21:36:04,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:04,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910161275] [2021-03-10 21:36:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910161275] [2021-03-10 21:36:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363536819] [2021-03-10 21:36:04,782 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 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 21:36:04,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:04,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:04,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203060470] [2021-03-10 21:36:04,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:04,883 INFO L87 Difference]: Start difference. First operand 1712 states and 5049 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 21:36:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:05,111 INFO L93 Difference]: Finished difference Result 2043 states and 5643 transitions. [2021-03-10 21:36:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:36:05,112 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 21:36:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:05,114 INFO L225 Difference]: With dead ends: 2043 [2021-03-10 21:36:05,114 INFO L226 Difference]: Without dead ends: 2035 [2021-03-10 21:36:05,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-03-10 21:36:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1712. [2021-03-10 21:36:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 2.9485680888369377) internal successors, (5045), 1711 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 5045 transitions. [2021-03-10 21:36:05,132 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 5045 transitions. Word has length 21 [2021-03-10 21:36:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:05,132 INFO L480 AbstractCegarLoop]: Abstraction has 1712 states and 5045 transitions. [2021-03-10 21:36:05,132 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 21:36:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 5045 transitions. [2021-03-10 21:36:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:05,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:05,134 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:05,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42019,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:05,334 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:05,335 INFO L82 PathProgramCache]: Analyzing trace with hash -915160642, now seen corresponding path program 360 times [2021-03-10 21:36:05,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:05,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500393956] [2021-03-10 21:36:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:05,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500393956] [2021-03-10 21:36:05,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209200386] [2021-03-10 21:36:05,400 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 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 21:36:05,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:36:05,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:05,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:05,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:05,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:05,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133662528] [2021-03-10 21:36:05,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:05,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:05,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:05,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:05,483 INFO L87 Difference]: Start difference. First operand 1712 states and 5045 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 21:36:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:05,645 INFO L93 Difference]: Finished difference Result 1974 states and 5556 transitions. [2021-03-10 21:36:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:05,646 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 21:36:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:05,648 INFO L225 Difference]: With dead ends: 1974 [2021-03-10 21:36:05,648 INFO L226 Difference]: Without dead ends: 1972 [2021-03-10 21:36:05,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-03-10 21:36:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1649. [2021-03-10 21:36:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.941140776699029) internal successors, (4847), 1648 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4847 transitions. [2021-03-10 21:36:05,664 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4847 transitions. Word has length 21 [2021-03-10 21:36:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:05,665 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 4847 transitions. [2021-03-10 21:36:05,665 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 21:36:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4847 transitions. [2021-03-10 21:36:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:05,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:05,666 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:05,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42020,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:05,866 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash 695080127, now seen corresponding path program 361 times [2021-03-10 21:36:05,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:05,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511359355] [2021-03-10 21:36:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:05,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511359355] [2021-03-10 21:36:05,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942802779] [2021-03-10 21:36:05,940 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 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 21:36:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:05,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:06,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:06,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:06,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663380270] [2021-03-10 21:36:06,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:06,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:06,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:06,020 INFO L87 Difference]: Start difference. First operand 1649 states and 4847 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 21:36:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:06,229 INFO L93 Difference]: Finished difference Result 2312 states and 6363 transitions. [2021-03-10 21:36:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:06,229 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 21:36:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:06,232 INFO L225 Difference]: With dead ends: 2312 [2021-03-10 21:36:06,232 INFO L226 Difference]: Without dead ends: 2292 [2021-03-10 21:36:06,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-03-10 21:36:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1649. [2021-03-10 21:36:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.9387135922330097) internal successors, (4843), 1648 states have internal predecessors, (4843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4843 transitions. [2021-03-10 21:36:06,251 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4843 transitions. Word has length 21 [2021-03-10 21:36:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:06,251 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 4843 transitions. [2021-03-10 21:36:06,251 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 21:36:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4843 transitions. [2021-03-10 21:36:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:06,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:06,252 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:06,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42021,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:06,453 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash 567974296, now seen corresponding path program 362 times [2021-03-10 21:36:06,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:06,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106043064] [2021-03-10 21:36:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:06,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106043064] [2021-03-10 21:36:06,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609087161] [2021-03-10 21:36:06,525 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 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 21:36:06,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:06,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:06,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:06,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:06,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911903336] [2021-03-10 21:36:06,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:06,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:06,605 INFO L87 Difference]: Start difference. First operand 1649 states and 4843 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 21:36:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:06,716 INFO L93 Difference]: Finished difference Result 2145 states and 6148 transitions. [2021-03-10 21:36:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:36:06,717 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 21:36:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:06,719 INFO L225 Difference]: With dead ends: 2145 [2021-03-10 21:36:06,719 INFO L226 Difference]: Without dead ends: 2145 [2021-03-10 21:36:06,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-03-10 21:36:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2006. [2021-03-10 21:36:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 2.9401496259351623) internal successors, (5895), 2005 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 5895 transitions. [2021-03-10 21:36:06,738 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 5895 transitions. Word has length 21 [2021-03-10 21:36:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:06,738 INFO L480 AbstractCegarLoop]: Abstraction has 2006 states and 5895 transitions. [2021-03-10 21:36:06,738 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 21:36:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 5895 transitions. [2021-03-10 21:36:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:06,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:06,740 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:06,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42022 [2021-03-10 21:36:06,940 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:06,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1035689605, now seen corresponding path program 363 times [2021-03-10 21:36:06,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:06,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803518868] [2021-03-10 21:36:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:07,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803518868] [2021-03-10 21:36:07,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545970270] [2021-03-10 21:36:07,022 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 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 21:36:07,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:36:07,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:07,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:07,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:07,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:07,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248704132] [2021-03-10 21:36:07,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:07,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:07,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:07,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:07,102 INFO L87 Difference]: Start difference. First operand 2006 states and 5895 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 21:36:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:07,337 INFO L93 Difference]: Finished difference Result 2656 states and 7407 transitions. [2021-03-10 21:36:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:07,338 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 21:36:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:07,341 INFO L225 Difference]: With dead ends: 2656 [2021-03-10 21:36:07,341 INFO L226 Difference]: Without dead ends: 2644 [2021-03-10 21:36:07,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-03-10 21:36:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2027. [2021-03-10 21:36:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 2.9387956564659428) internal successors, (5954), 2026 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 5954 transitions. [2021-03-10 21:36:07,364 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 5954 transitions. Word has length 21 [2021-03-10 21:36:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:07,365 INFO L480 AbstractCegarLoop]: Abstraction has 2027 states and 5954 transitions. [2021-03-10 21:36:07,365 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 21:36:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 5954 transitions. [2021-03-10 21:36:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:07,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:07,366 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:07,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42023,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:07,567 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:07,567 INFO L82 PathProgramCache]: Analyzing trace with hash -699482882, now seen corresponding path program 364 times [2021-03-10 21:36:07,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:07,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470079323] [2021-03-10 21:36:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:07,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470079323] [2021-03-10 21:36:07,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527638368] [2021-03-10 21:36:07,644 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 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 21:36:07,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:07,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:07,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:07,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:07,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043053578] [2021-03-10 21:36:07,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:07,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:07,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:07,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:07,726 INFO L87 Difference]: Start difference. First operand 2027 states and 5954 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 21:36:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:07,931 INFO L93 Difference]: Finished difference Result 2251 states and 6357 transitions. [2021-03-10 21:36:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:36:07,932 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 21:36:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:07,934 INFO L225 Difference]: With dead ends: 2251 [2021-03-10 21:36:07,934 INFO L226 Difference]: Without dead ends: 2251 [2021-03-10 21:36:07,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-03-10 21:36:07,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1996. [2021-03-10 21:36:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 2.937844611528822) internal successors, (5861), 1995 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 5861 transitions. [2021-03-10 21:36:07,954 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 5861 transitions. Word has length 21 [2021-03-10 21:36:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:07,954 INFO L480 AbstractCegarLoop]: Abstraction has 1996 states and 5861 transitions. [2021-03-10 21:36:07,955 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 21:36:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 5861 transitions. [2021-03-10 21:36:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:07,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:07,956 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:08,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42024 [2021-03-10 21:36:08,157 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:08,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1145023551, now seen corresponding path program 365 times [2021-03-10 21:36:08,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:08,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977196365] [2021-03-10 21:36:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:08,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977196365] [2021-03-10 21:36:08,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719632408] [2021-03-10 21:36:08,245 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 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 21:36:08,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:08,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:08,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:08,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176861928] [2021-03-10 21:36:08,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:08,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:08,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:08,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:08,325 INFO L87 Difference]: Start difference. First operand 1996 states and 5861 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 21:36:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:08,444 INFO L93 Difference]: Finished difference Result 2310 states and 6557 transitions. [2021-03-10 21:36:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:08,445 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 21:36:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:08,447 INFO L225 Difference]: With dead ends: 2310 [2021-03-10 21:36:08,447 INFO L226 Difference]: Without dead ends: 2296 [2021-03-10 21:36:08,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:36:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-03-10 21:36:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1996. [2021-03-10 21:36:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 2.93734335839599) internal successors, (5860), 1995 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 5860 transitions. [2021-03-10 21:36:08,466 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 5860 transitions. Word has length 21 [2021-03-10 21:36:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:08,466 INFO L480 AbstractCegarLoop]: Abstraction has 1996 states and 5860 transitions. [2021-03-10 21:36:08,466 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 21:36:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 5860 transitions. [2021-03-10 21:36:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:08,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:08,468 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:08,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42025 [2021-03-10 21:36:08,668 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1335949736, now seen corresponding path program 366 times [2021-03-10 21:36:08,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:08,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778040836] [2021-03-10 21:36:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:08,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778040836] [2021-03-10 21:36:08,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633076192] [2021-03-10 21:36:08,780 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 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 21:36:08,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:36:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:08,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:08,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:08,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:08,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401745995] [2021-03-10 21:36:08,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:08,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:08,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:08,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:08,889 INFO L87 Difference]: Start difference. First operand 1996 states and 5860 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 21:36:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:09,232 INFO L93 Difference]: Finished difference Result 2327 states and 6561 transitions. [2021-03-10 21:36:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:36:09,233 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 21:36:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:09,235 INFO L225 Difference]: With dead ends: 2327 [2021-03-10 21:36:09,235 INFO L226 Difference]: Without dead ends: 2327 [2021-03-10 21:36:09,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:36:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-03-10 21:36:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2072. [2021-03-10 21:36:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.9391598261709317) internal successors, (6087), 2071 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6087 transitions. [2021-03-10 21:36:09,256 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6087 transitions. Word has length 21 [2021-03-10 21:36:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:09,256 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6087 transitions. [2021-03-10 21:36:09,256 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 21:36:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6087 transitions. [2021-03-10 21:36:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:09,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:09,258 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:09,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42026,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:09,458 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash 27654651, now seen corresponding path program 367 times [2021-03-10 21:36:09,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:09,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363620077] [2021-03-10 21:36:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:09,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363620077] [2021-03-10 21:36:09,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865543821] [2021-03-10 21:36:09,558 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 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 21:36:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:09,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:09,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:09,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:09,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482185399] [2021-03-10 21:36:09,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:09,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:09,641 INFO L87 Difference]: Start difference. First operand 2072 states and 6087 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 21:36:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:09,764 INFO L93 Difference]: Finished difference Result 2366 states and 6736 transitions. [2021-03-10 21:36:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:36:09,765 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 21:36:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:09,768 INFO L225 Difference]: With dead ends: 2366 [2021-03-10 21:36:09,768 INFO L226 Difference]: Without dead ends: 2350 [2021-03-10 21:36:09,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-03-10 21:36:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2072. [2021-03-10 21:36:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.938676967648479) internal successors, (6086), 2071 states have internal predecessors, (6086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6086 transitions. [2021-03-10 21:36:09,791 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6086 transitions. Word has length 21 [2021-03-10 21:36:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:09,791 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6086 transitions. [2021-03-10 21:36:09,791 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 21:36:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6086 transitions. [2021-03-10 21:36:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:09,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:09,793 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:09,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42027 [2021-03-10 21:36:09,993 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:09,994 INFO L82 PathProgramCache]: Analyzing trace with hash 408414270, now seen corresponding path program 368 times [2021-03-10 21:36:09,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:09,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045410249] [2021-03-10 21:36:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045410249] [2021-03-10 21:36:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304767170] [2021-03-10 21:36:10,088 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 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 21:36:10,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:10,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:10,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:10,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:10,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:10,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78816928] [2021-03-10 21:36:10,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:10,173 INFO L87 Difference]: Start difference. First operand 2072 states and 6086 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 21:36:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:10,529 INFO L93 Difference]: Finished difference Result 2511 states and 7067 transitions. [2021-03-10 21:36:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:36:10,530 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 21:36:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:10,532 INFO L225 Difference]: With dead ends: 2511 [2021-03-10 21:36:10,532 INFO L226 Difference]: Without dead ends: 2511 [2021-03-10 21:36:10,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:36:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-03-10 21:36:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2096. [2021-03-10 21:36:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.939379474940334) internal successors, (6158), 2095 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 6158 transitions. [2021-03-10 21:36:10,553 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 6158 transitions. Word has length 21 [2021-03-10 21:36:10,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:10,553 INFO L480 AbstractCegarLoop]: Abstraction has 2096 states and 6158 transitions. [2021-03-10 21:36:10,553 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 21:36:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 6158 transitions. [2021-03-10 21:36:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:10,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:10,555 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:10,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42028 [2021-03-10 21:36:10,755 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:10,755 INFO L82 PathProgramCache]: Analyzing trace with hash -962719899, now seen corresponding path program 369 times [2021-03-10 21:36:10,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:10,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606930900] [2021-03-10 21:36:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:10,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606930900] [2021-03-10 21:36:10,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121545694] [2021-03-10 21:36:10,863 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 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 21:36:10,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:36:10,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:10,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:10,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:10,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:36:10,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009133832] [2021-03-10 21:36:10,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:10,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:10,959 INFO L87 Difference]: Start difference. First operand 2096 states and 6158 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 21:36:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:11,123 INFO L93 Difference]: Finished difference Result 2432 states and 6850 transitions. [2021-03-10 21:36:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:11,124 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 21:36:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:11,127 INFO L225 Difference]: With dead ends: 2432 [2021-03-10 21:36:11,128 INFO L226 Difference]: Without dead ends: 2432 [2021-03-10 21:36:11,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-03-10 21:36:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2158. [2021-03-10 21:36:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 2.9531757070004634) internal successors, (6370), 2157 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6370 transitions. [2021-03-10 21:36:11,152 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6370 transitions. Word has length 21 [2021-03-10 21:36:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:11,152 INFO L480 AbstractCegarLoop]: Abstraction has 2158 states and 6370 transitions. [2021-03-10 21:36:11,152 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 21:36:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6370 transitions. [2021-03-10 21:36:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:11,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:11,154 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:11,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42029,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:11,354 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318936, now seen corresponding path program 370 times [2021-03-10 21:36:11,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:11,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531174658] [2021-03-10 21:36:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:11,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531174658] [2021-03-10 21:36:11,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995147959] [2021-03-10 21:36:11,464 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 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 21:36:11,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:11,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:11,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:11,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:36:11,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946667769] [2021-03-10 21:36:11,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:11,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:11,533 INFO L87 Difference]: Start difference. First operand 2158 states and 6370 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 21:36:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:11,846 INFO L93 Difference]: Finished difference Result 2458 states and 6888 transitions. [2021-03-10 21:36:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:36:11,847 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 21:36:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:11,849 INFO L225 Difference]: With dead ends: 2458 [2021-03-10 21:36:11,849 INFO L226 Difference]: Without dead ends: 2454 [2021-03-10 21:36:11,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-03-10 21:36:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2177. [2021-03-10 21:36:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.9568014705882355) internal successors, (6434), 2176 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 6434 transitions. [2021-03-10 21:36:11,873 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 6434 transitions. Word has length 21 [2021-03-10 21:36:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:11,873 INFO L480 AbstractCegarLoop]: Abstraction has 2177 states and 6434 transitions. [2021-03-10 21:36:11,873 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 21:36:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 6434 transitions. [2021-03-10 21:36:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:11,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:11,875 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:12,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42030,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:12,079 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash -576518785, now seen corresponding path program 371 times [2021-03-10 21:36:12,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:12,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105087326] [2021-03-10 21:36:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:12,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105087326] [2021-03-10 21:36:12,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343747441] [2021-03-10 21:36:12,151 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 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 21:36:12,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:36:12,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:12,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:12,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:12,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9193484] [2021-03-10 21:36:12,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:12,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:12,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:12,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:12,222 INFO L87 Difference]: Start difference. First operand 2177 states and 6434 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 21:36:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:12,448 INFO L93 Difference]: Finished difference Result 2392 states and 6777 transitions. [2021-03-10 21:36:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:36:12,449 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 21:36:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:12,451 INFO L225 Difference]: With dead ends: 2392 [2021-03-10 21:36:12,451 INFO L226 Difference]: Without dead ends: 2386 [2021-03-10 21:36:12,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-03-10 21:36:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2157. [2021-03-10 21:36:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.950834879406308) internal successors, (6362), 2156 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6362 transitions. [2021-03-10 21:36:12,478 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6362 transitions. Word has length 21 [2021-03-10 21:36:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:12,478 INFO L480 AbstractCegarLoop]: Abstraction has 2157 states and 6362 transitions. [2021-03-10 21:36:12,478 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 21:36:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6362 transitions. [2021-03-10 21:36:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:12,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:12,481 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:12,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42031,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:12,681 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1237782568, now seen corresponding path program 372 times [2021-03-10 21:36:12,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:12,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068340541] [2021-03-10 21:36:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068340541] [2021-03-10 21:36:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283427895] [2021-03-10 21:36:12,776 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 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 21:36:12,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:12,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:12,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:12,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:12,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314329998] [2021-03-10 21:36:12,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:12,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:12,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:12,891 INFO L87 Difference]: Start difference. First operand 2157 states and 6362 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 21:36:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:13,028 INFO L93 Difference]: Finished difference Result 2538 states and 7089 transitions. [2021-03-10 21:36:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:13,030 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 21:36:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:13,033 INFO L225 Difference]: With dead ends: 2538 [2021-03-10 21:36:13,033 INFO L226 Difference]: Without dead ends: 2538 [2021-03-10 21:36:13,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:36:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-03-10 21:36:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2167. [2021-03-10 21:36:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.948291782086796) internal successors, (6386), 2166 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 6386 transitions. [2021-03-10 21:36:13,060 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 6386 transitions. Word has length 21 [2021-03-10 21:36:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:13,060 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 6386 transitions. [2021-03-10 21:36:13,060 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 21:36:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 6386 transitions. [2021-03-10 21:36:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:13,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:13,062 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:13,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42032 [2021-03-10 21:36:13,262 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash 577001109, now seen corresponding path program 373 times [2021-03-10 21:36:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:13,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839663166] [2021-03-10 21:36:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839663166] [2021-03-10 21:36:13,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700093435] [2021-03-10 21:36:13,330 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 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 21:36:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:13,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:13,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:13,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153349299] [2021-03-10 21:36:13,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:13,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:13,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:13,397 INFO L87 Difference]: Start difference. First operand 2167 states and 6386 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 21:36:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:13,642 INFO L93 Difference]: Finished difference Result 2405 states and 6848 transitions. [2021-03-10 21:36:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:36:13,643 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 21:36:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:13,646 INFO L225 Difference]: With dead ends: 2405 [2021-03-10 21:36:13,646 INFO L226 Difference]: Without dead ends: 2399 [2021-03-10 21:36:13,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-03-10 21:36:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2165. [2021-03-10 21:36:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.9482439926062844) internal successors, (6380), 2164 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6380 transitions. [2021-03-10 21:36:13,671 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6380 transitions. Word has length 21 [2021-03-10 21:36:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:13,672 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 6380 transitions. [2021-03-10 21:36:13,672 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 21:36:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6380 transitions. [2021-03-10 21:36:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:13,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:13,674 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:13,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42033,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:13,874 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1534180504, now seen corresponding path program 374 times [2021-03-10 21:36:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:13,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411225825] [2021-03-10 21:36:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411225825] [2021-03-10 21:36:13,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129029942] [2021-03-10 21:36:13,983 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 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 21:36:14,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:14,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:14,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:14,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:14,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51474937] [2021-03-10 21:36:14,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:14,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:14,064 INFO L87 Difference]: Start difference. First operand 2165 states and 6380 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 21:36:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:14,205 INFO L93 Difference]: Finished difference Result 2530 states and 7102 transitions. [2021-03-10 21:36:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:36:14,206 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 21:36:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:14,208 INFO L225 Difference]: With dead ends: 2530 [2021-03-10 21:36:14,208 INFO L226 Difference]: Without dead ends: 2530 [2021-03-10 21:36:14,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:36:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-03-10 21:36:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2167. [2021-03-10 21:36:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.9464450600184673) internal successors, (6382), 2166 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 6382 transitions. [2021-03-10 21:36:14,231 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 6382 transitions. Word has length 21 [2021-03-10 21:36:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:14,231 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 6382 transitions. [2021-03-10 21:36:14,231 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 21:36:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 6382 transitions. [2021-03-10 21:36:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:14,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:14,233 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:14,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42034 [2021-03-10 21:36:14,433 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash 148135359, now seen corresponding path program 375 times [2021-03-10 21:36:14,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:14,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611610524] [2021-03-10 21:36:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611610524] [2021-03-10 21:36:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955015879] [2021-03-10 21:36:14,513 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 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 21:36:14,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:36:14,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:14,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:14,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:14,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:14,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936933228] [2021-03-10 21:36:14,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:14,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:14,656 INFO L87 Difference]: Start difference. First operand 2167 states and 6382 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 21:36:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:14,862 INFO L93 Difference]: Finished difference Result 2537 states and 7205 transitions. [2021-03-10 21:36:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:36:14,863 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 21:36:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:14,865 INFO L225 Difference]: With dead ends: 2537 [2021-03-10 21:36:14,865 INFO L226 Difference]: Without dead ends: 2523 [2021-03-10 21:36:14,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:36:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-03-10 21:36:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2167. [2021-03-10 21:36:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.945983379501385) internal successors, (6381), 2166 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 6381 transitions. [2021-03-10 21:36:14,889 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 6381 transitions. Word has length 21 [2021-03-10 21:36:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:14,889 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 6381 transitions. [2021-03-10 21:36:14,889 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 21:36:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 6381 transitions. [2021-03-10 21:36:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:14,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:14,891 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:15,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42035 [2021-03-10 21:36:15,091 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1962129368, now seen corresponding path program 376 times [2021-03-10 21:36:15,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:15,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515465391] [2021-03-10 21:36:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:15,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515465391] [2021-03-10 21:36:15,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427271522] [2021-03-10 21:36:15,186 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 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 21:36:15,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:15,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:15,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:15,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896686487] [2021-03-10 21:36:15,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:15,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:15,276 INFO L87 Difference]: Start difference. First operand 2167 states and 6381 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 21:36:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:15,624 INFO L93 Difference]: Finished difference Result 2743 states and 7790 transitions. [2021-03-10 21:36:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:36:15,625 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 21:36:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:15,628 INFO L225 Difference]: With dead ends: 2743 [2021-03-10 21:36:15,628 INFO L226 Difference]: Without dead ends: 2743 [2021-03-10 21:36:15,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:36:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2021-03-10 21:36:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2195. [2021-03-10 21:36:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 2.9512306289881494) internal successors, (6475), 2194 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 6475 transitions. [2021-03-10 21:36:15,651 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 6475 transitions. Word has length 21 [2021-03-10 21:36:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:15,651 INFO L480 AbstractCegarLoop]: Abstraction has 2195 states and 6475 transitions. [2021-03-10 21:36:15,651 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 21:36:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 6475 transitions. [2021-03-10 21:36:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:15,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:15,653 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:15,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42036,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:15,855 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1611155303, now seen corresponding path program 377 times [2021-03-10 21:36:15,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:15,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613017993] [2021-03-10 21:36:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:15,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613017993] [2021-03-10 21:36:15,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395886856] [2021-03-10 21:36:15,934 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 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 21:36:15,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:15,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:16,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:16,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:16,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452402359] [2021-03-10 21:36:16,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:16,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:16,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:16,013 INFO L87 Difference]: Start difference. First operand 2195 states and 6475 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 21:36:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:16,257 INFO L93 Difference]: Finished difference Result 2736 states and 7662 transitions. [2021-03-10 21:36:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:36:16,258 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 21:36:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:16,261 INFO L225 Difference]: With dead ends: 2736 [2021-03-10 21:36:16,261 INFO L226 Difference]: Without dead ends: 2722 [2021-03-10 21:36:16,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:36:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-03-10 21:36:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2199. [2021-03-10 21:36:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9504094631483166) internal successors, (6485), 2198 states have internal predecessors, (6485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6485 transitions. [2021-03-10 21:36:16,288 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6485 transitions. Word has length 21 [2021-03-10 21:36:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:16,289 INFO L480 AbstractCegarLoop]: Abstraction has 2199 states and 6485 transitions. [2021-03-10 21:36:16,289 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 21:36:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6485 transitions. [2021-03-10 21:36:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:16,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:16,290 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:16,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42037 [2021-03-10 21:36:16,491 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash 202838706, now seen corresponding path program 378 times [2021-03-10 21:36:16,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:16,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697144772] [2021-03-10 21:36:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:16,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697144772] [2021-03-10 21:36:16,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462160161] [2021-03-10 21:36:16,577 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 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 21:36:16,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:16,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:16,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:16,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578278677] [2021-03-10 21:36:16,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:16,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:16,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:16,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:16,661 INFO L87 Difference]: Start difference. First operand 2199 states and 6485 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 21:36:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:16,933 INFO L93 Difference]: Finished difference Result 2456 states and 7019 transitions. [2021-03-10 21:36:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:16,934 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 21:36:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:16,937 INFO L225 Difference]: With dead ends: 2456 [2021-03-10 21:36:16,937 INFO L226 Difference]: Without dead ends: 2456 [2021-03-10 21:36:16,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:36:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-03-10 21:36:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2205. [2021-03-10 21:36:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9505444646098002) internal successors, (6503), 2204 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6503 transitions. [2021-03-10 21:36:16,959 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6503 transitions. Word has length 21 [2021-03-10 21:36:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:16,959 INFO L480 AbstractCegarLoop]: Abstraction has 2205 states and 6503 transitions. [2021-03-10 21:36:16,959 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 21:36:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6503 transitions. [2021-03-10 21:36:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:16,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:16,961 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:17,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42038 [2021-03-10 21:36:17,162 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1566443093, now seen corresponding path program 379 times [2021-03-10 21:36:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:17,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561815555] [2021-03-10 21:36:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:17,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561815555] [2021-03-10 21:36:17,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800077181] [2021-03-10 21:36:17,247 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 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 21:36:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:17,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:17,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:17,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:17,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462986767] [2021-03-10 21:36:17,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:17,331 INFO L87 Difference]: Start difference. First operand 2205 states and 6503 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 21:36:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:17,440 INFO L93 Difference]: Finished difference Result 2515 states and 7190 transitions. [2021-03-10 21:36:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:17,441 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 21:36:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:17,444 INFO L225 Difference]: With dead ends: 2515 [2021-03-10 21:36:17,444 INFO L226 Difference]: Without dead ends: 2499 [2021-03-10 21:36:17,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-03-10 21:36:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2205. [2021-03-10 21:36:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9500907441016335) internal successors, (6502), 2204 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6502 transitions. [2021-03-10 21:36:17,466 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6502 transitions. Word has length 21 [2021-03-10 21:36:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:17,466 INFO L480 AbstractCegarLoop]: Abstraction has 2205 states and 6502 transitions. [2021-03-10 21:36:17,466 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 21:36:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6502 transitions. [2021-03-10 21:36:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:17,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:17,468 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:17,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42039 [2021-03-10 21:36:17,668 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1947202712, now seen corresponding path program 380 times [2021-03-10 21:36:17,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:17,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513108319] [2021-03-10 21:36:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:17,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513108319] [2021-03-10 21:36:17,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212067467] [2021-03-10 21:36:17,797 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 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 21:36:17,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:17,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:17,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:17,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:17,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061932087] [2021-03-10 21:36:17,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:17,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:17,895 INFO L87 Difference]: Start difference. First operand 2205 states and 6502 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 21:36:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:18,371 INFO L93 Difference]: Finished difference Result 2555 states and 7288 transitions. [2021-03-10 21:36:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:36:18,372 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 21:36:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:18,375 INFO L225 Difference]: With dead ends: 2555 [2021-03-10 21:36:18,376 INFO L226 Difference]: Without dead ends: 2555 [2021-03-10 21:36:18,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:36:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-03-10 21:36:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2220. [2021-03-10 21:36:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.949526813880126) internal successors, (6545), 2219 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 6545 transitions. [2021-03-10 21:36:18,400 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 6545 transitions. Word has length 21 [2021-03-10 21:36:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:18,400 INFO L480 AbstractCegarLoop]: Abstraction has 2220 states and 6545 transitions. [2021-03-10 21:36:18,400 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 21:36:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 6545 transitions. [2021-03-10 21:36:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:18,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:18,402 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:18,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42040,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:18,602 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1278888389, now seen corresponding path program 381 times [2021-03-10 21:36:18,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:18,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388251010] [2021-03-10 21:36:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:18,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388251010] [2021-03-10 21:36:18,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477829912] [2021-03-10 21:36:18,675 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 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 21:36:18,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:36:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:18,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:18,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:18,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669143523] [2021-03-10 21:36:18,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:18,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:18,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:18,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:18,758 INFO L87 Difference]: Start difference. First operand 2220 states and 6545 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 21:36:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:18,869 INFO L93 Difference]: Finished difference Result 2817 states and 7939 transitions. [2021-03-10 21:36:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:36:18,870 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 21:36:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:18,873 INFO L225 Difference]: With dead ends: 2817 [2021-03-10 21:36:18,874 INFO L226 Difference]: Without dead ends: 2817 [2021-03-10 21:36:18,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-03-10 21:36:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2469. [2021-03-10 21:36:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.98257698541329) internal successors, (7361), 2468 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 7361 transitions. [2021-03-10 21:36:18,901 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 7361 transitions. Word has length 21 [2021-03-10 21:36:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:18,901 INFO L480 AbstractCegarLoop]: Abstraction has 2469 states and 7361 transitions. [2021-03-10 21:36:18,901 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 21:36:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 7361 transitions. [2021-03-10 21:36:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:18,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:18,903 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:19,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42041 [2021-03-10 21:36:19,104 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1197758104, now seen corresponding path program 382 times [2021-03-10 21:36:19,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:19,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983702975] [2021-03-10 21:36:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:19,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983702975] [2021-03-10 21:36:19,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252078386] [2021-03-10 21:36:19,173 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 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 21:36:19,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:19,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:19,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35501242] [2021-03-10 21:36:19,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:19,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:19,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:19,242 INFO L87 Difference]: Start difference. First operand 2469 states and 7361 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 21:36:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:19,481 INFO L93 Difference]: Finished difference Result 2731 states and 7803 transitions. [2021-03-10 21:36:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:36:19,482 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 21:36:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:19,485 INFO L225 Difference]: With dead ends: 2731 [2021-03-10 21:36:19,485 INFO L226 Difference]: Without dead ends: 2729 [2021-03-10 21:36:19,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-03-10 21:36:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2491. [2021-03-10 21:36:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2490 states have (on average 2.9887550200803212) internal successors, (7442), 2490 states have internal predecessors, (7442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 7442 transitions. [2021-03-10 21:36:19,511 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 7442 transitions. Word has length 21 [2021-03-10 21:36:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:19,512 INFO L480 AbstractCegarLoop]: Abstraction has 2491 states and 7442 transitions. [2021-03-10 21:36:19,512 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 21:36:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 7442 transitions. [2021-03-10 21:36:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:19,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:19,514 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:19,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42042,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:19,714 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash 315839103, now seen corresponding path program 383 times [2021-03-10 21:36:19,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:19,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147439358] [2021-03-10 21:36:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147439358] [2021-03-10 21:36:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477142900] [2021-03-10 21:36:19,777 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 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 21:36:19,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:36:19,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:19,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:19,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:19,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133769871] [2021-03-10 21:36:19,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:19,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:19,848 INFO L87 Difference]: Start difference. First operand 2491 states and 7442 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 21:36:20,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:20,048 INFO L93 Difference]: Finished difference Result 2816 states and 7978 transitions. [2021-03-10 21:36:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:36:20,049 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 21:36:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:20,052 INFO L225 Difference]: With dead ends: 2816 [2021-03-10 21:36:20,052 INFO L226 Difference]: Without dead ends: 2814 [2021-03-10 21:36:20,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-03-10 21:36:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2473. [2021-03-10 21:36:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 2.982200647249191) internal successors, (7372), 2472 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 7372 transitions. [2021-03-10 21:36:20,079 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 7372 transitions. Word has length 21 [2021-03-10 21:36:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:20,079 INFO L480 AbstractCegarLoop]: Abstraction has 2473 states and 7372 transitions. [2021-03-10 21:36:20,079 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 21:36:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 7372 transitions. [2021-03-10 21:36:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:20,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:20,081 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:20,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42043 [2021-03-10 21:36:20,282 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -345424680, now seen corresponding path program 384 times [2021-03-10 21:36:20,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:20,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743837106] [2021-03-10 21:36:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:20,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743837106] [2021-03-10 21:36:20,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817061461] [2021-03-10 21:36:20,350 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 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 21:36:20,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:36:20,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:20,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:20,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:20,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475952808] [2021-03-10 21:36:20,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:20,425 INFO L87 Difference]: Start difference. First operand 2473 states and 7372 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 21:36:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:20,568 INFO L93 Difference]: Finished difference Result 2803 states and 7966 transitions. [2021-03-10 21:36:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:36:20,569 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 21:36:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:20,572 INFO L225 Difference]: With dead ends: 2803 [2021-03-10 21:36:20,572 INFO L226 Difference]: Without dead ends: 2803 [2021-03-10 21:36:20,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-03-10 21:36:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2479. [2021-03-10 21:36:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 2.982243744955609) internal successors, (7390), 2478 states have internal predecessors, (7390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 7390 transitions. [2021-03-10 21:36:20,598 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 7390 transitions. Word has length 21 [2021-03-10 21:36:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:20,598 INFO L480 AbstractCegarLoop]: Abstraction has 2479 states and 7390 transitions. [2021-03-10 21:36:20,598 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 21:36:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 7390 transitions. [2021-03-10 21:36:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:20,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:20,600 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:20,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42044,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:20,801 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash 931503419, now seen corresponding path program 385 times [2021-03-10 21:36:20,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:20,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450710966] [2021-03-10 21:36:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:20,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450710966] [2021-03-10 21:36:20,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193146275] [2021-03-10 21:36:20,886 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 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 21:36:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:20,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:20,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:20,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340164903] [2021-03-10 21:36:20,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:20,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:20,957 INFO L87 Difference]: Start difference. First operand 2479 states and 7390 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 21:36:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:21,165 INFO L93 Difference]: Finished difference Result 2905 states and 8239 transitions. [2021-03-10 21:36:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:36:21,166 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 21:36:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:21,169 INFO L225 Difference]: With dead ends: 2905 [2021-03-10 21:36:21,169 INFO L226 Difference]: Without dead ends: 2901 [2021-03-10 21:36:21,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-03-10 21:36:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2479. [2021-03-10 21:36:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 2.9818401937046004) internal successors, (7389), 2478 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 7389 transitions. [2021-03-10 21:36:21,196 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 7389 transitions. Word has length 21 [2021-03-10 21:36:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:21,196 INFO L480 AbstractCegarLoop]: Abstraction has 2479 states and 7389 transitions. [2021-03-10 21:36:21,196 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 21:36:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 7389 transitions. [2021-03-10 21:36:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:21,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:21,198 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:21,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42045 [2021-03-10 21:36:21,398 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1888682814, now seen corresponding path program 386 times [2021-03-10 21:36:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:21,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964666713] [2021-03-10 21:36:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:21,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964666713] [2021-03-10 21:36:21,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616326346] [2021-03-10 21:36:21,464 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 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 21:36:21,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:21,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:21,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:21,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:21,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100317591] [2021-03-10 21:36:21,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:21,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:21,539 INFO L87 Difference]: Start difference. First operand 2479 states and 7389 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 21:36:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:21,737 INFO L93 Difference]: Finished difference Result 2825 states and 8053 transitions. [2021-03-10 21:36:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:21,738 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 21:36:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:21,741 INFO L225 Difference]: With dead ends: 2825 [2021-03-10 21:36:21,741 INFO L226 Difference]: Without dead ends: 2825 [2021-03-10 21:36:21,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:36:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-03-10 21:36:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2499. [2021-03-10 21:36:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 2.9843875100080064) internal successors, (7455), 2498 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 7455 transitions. [2021-03-10 21:36:21,768 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 7455 transitions. Word has length 21 [2021-03-10 21:36:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:21,768 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 7455 transitions. [2021-03-10 21:36:21,768 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 21:36:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 7455 transitions. [2021-03-10 21:36:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:21,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:21,770 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:21,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42046,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:21,971 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1457739265, now seen corresponding path program 387 times [2021-03-10 21:36:21,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:21,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201084917] [2021-03-10 21:36:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:22,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201084917] [2021-03-10 21:36:22,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798149850] [2021-03-10 21:36:22,041 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 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 21:36:22,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:36:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:22,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:22,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:36:22,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539291299] [2021-03-10 21:36:22,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:22,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:22,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:22,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:22,120 INFO L87 Difference]: Start difference. First operand 2499 states and 7455 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 21:36:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:22,326 INFO L93 Difference]: Finished difference Result 2886 states and 8196 transitions. [2021-03-10 21:36:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:22,327 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 21:36:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:22,330 INFO L225 Difference]: With dead ends: 2886 [2021-03-10 21:36:22,330 INFO L226 Difference]: Without dead ends: 2880 [2021-03-10 21:36:22,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:36:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-03-10 21:36:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2499. [2021-03-10 21:36:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 2.9839871897518013) internal successors, (7454), 2498 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 7454 transitions. [2021-03-10 21:36:22,357 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 7454 transitions. Word has length 21 [2021-03-10 21:36:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:22,357 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 7454 transitions. [2021-03-10 21:36:22,357 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 21:36:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 7454 transitions. [2021-03-10 21:36:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:22,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:22,359 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:22,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42047 [2021-03-10 21:36:22,560 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1785148859, now seen corresponding path program 388 times [2021-03-10 21:36:22,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:22,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740984788] [2021-03-10 21:36:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740984788] [2021-03-10 21:36:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880092494] [2021-03-10 21:36:22,634 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 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 21:36:22,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:22,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:22,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:22,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735130335] [2021-03-10 21:36:22,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:22,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:22,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:22,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:22,719 INFO L87 Difference]: Start difference. First operand 2499 states and 7454 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 21:36:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:22,964 INFO L93 Difference]: Finished difference Result 2922 states and 8263 transitions. [2021-03-10 21:36:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:36:22,965 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 21:36:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:22,969 INFO L225 Difference]: With dead ends: 2922 [2021-03-10 21:36:22,969 INFO L226 Difference]: Without dead ends: 2914 [2021-03-10 21:36:22,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-03-10 21:36:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2531. [2021-03-10 21:36:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 2.990513833992095) internal successors, (7566), 2530 states have internal predecessors, (7566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 7566 transitions. [2021-03-10 21:36:22,997 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 7566 transitions. Word has length 21 [2021-03-10 21:36:22,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:22,997 INFO L480 AbstractCegarLoop]: Abstraction has 2531 states and 7566 transitions. [2021-03-10 21:36:22,997 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 21:36:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 7566 transitions. [2021-03-10 21:36:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:23,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:23,000 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:23,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42048 [2021-03-10 21:36:23,200 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1920192126, now seen corresponding path program 389 times [2021-03-10 21:36:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223451168] [2021-03-10 21:36:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:23,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223451168] [2021-03-10 21:36:23,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211863145] [2021-03-10 21:36:23,280 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 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 21:36:23,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:23,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:23,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:23,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123029306] [2021-03-10 21:36:23,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:23,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:23,373 INFO L87 Difference]: Start difference. First operand 2531 states and 7566 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 21:36:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:23,623 INFO L93 Difference]: Finished difference Result 2866 states and 8270 transitions. [2021-03-10 21:36:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:36:23,625 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 21:36:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:23,628 INFO L225 Difference]: With dead ends: 2866 [2021-03-10 21:36:23,628 INFO L226 Difference]: Without dead ends: 2866 [2021-03-10 21:36:23,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-03-10 21:36:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2613. [2021-03-10 21:36:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.9931087289433385) internal successors, (7818), 2612 states have internal predecessors, (7818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7818 transitions. [2021-03-10 21:36:23,657 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7818 transitions. Word has length 21 [2021-03-10 21:36:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:23,657 INFO L480 AbstractCegarLoop]: Abstraction has 2613 states and 7818 transitions. [2021-03-10 21:36:23,657 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 21:36:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7818 transitions. [2021-03-10 21:36:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:23,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:23,659 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:23,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42049 [2021-03-10 21:36:23,860 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash -764534401, now seen corresponding path program 390 times [2021-03-10 21:36:23,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:23,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560430301] [2021-03-10 21:36:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:23,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560430301] [2021-03-10 21:36:23,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152161832] [2021-03-10 21:36:23,938 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 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 21:36:23,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:36:23,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:24,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:24,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:24,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394084256] [2021-03-10 21:36:24,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:24,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:24,021 INFO L87 Difference]: Start difference. First operand 2613 states and 7818 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 21:36:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:24,259 INFO L93 Difference]: Finished difference Result 3493 states and 9885 transitions. [2021-03-10 21:36:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:24,260 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 21:36:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:24,264 INFO L225 Difference]: With dead ends: 3493 [2021-03-10 21:36:24,264 INFO L226 Difference]: Without dead ends: 3483 [2021-03-10 21:36:24,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2021-03-10 21:36:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 2611. [2021-03-10 21:36:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 2.9931034482758623) internal successors, (7812), 2610 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 7812 transitions. [2021-03-10 21:36:24,296 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 7812 transitions. Word has length 21 [2021-03-10 21:36:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:24,296 INFO L480 AbstractCegarLoop]: Abstraction has 2611 states and 7812 transitions. [2021-03-10 21:36:24,296 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 21:36:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 7812 transitions. [2021-03-10 21:36:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:24,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:24,299 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:24,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42050 [2021-03-10 21:36:24,499 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:24,499 INFO L82 PathProgramCache]: Analyzing trace with hash -891640232, now seen corresponding path program 391 times [2021-03-10 21:36:24,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:24,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52078162] [2021-03-10 21:36:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52078162] [2021-03-10 21:36:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553270155] [2021-03-10 21:36:24,581 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 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 21:36:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:24,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:24,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:24,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371581302] [2021-03-10 21:36:24,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:24,691 INFO L87 Difference]: Start difference. First operand 2611 states and 7812 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 21:36:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:24,910 INFO L93 Difference]: Finished difference Result 3000 states and 8753 transitions. [2021-03-10 21:36:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:24,911 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 21:36:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:24,914 INFO L225 Difference]: With dead ends: 3000 [2021-03-10 21:36:24,914 INFO L226 Difference]: Without dead ends: 3000 [2021-03-10 21:36:24,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-03-10 21:36:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2792. [2021-03-10 21:36:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.996058760300967) internal successors, (8362), 2791 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 8362 transitions. [2021-03-10 21:36:24,945 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 8362 transitions. Word has length 21 [2021-03-10 21:36:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:24,945 INFO L480 AbstractCegarLoop]: Abstraction has 2792 states and 8362 transitions. [2021-03-10 21:36:24,945 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 21:36:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 8362 transitions. [2021-03-10 21:36:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:24,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:24,947 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:25,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42051,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:25,148 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1799663163, now seen corresponding path program 392 times [2021-03-10 21:36:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:25,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508772572] [2021-03-10 21:36:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:25,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508772572] [2021-03-10 21:36:25,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487295934] [2021-03-10 21:36:25,226 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 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 21:36:25,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:25,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:25,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:25,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:25,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134897307] [2021-03-10 21:36:25,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:25,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:25,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:25,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:25,312 INFO L87 Difference]: Start difference. First operand 2792 states and 8362 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 21:36:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:25,536 INFO L93 Difference]: Finished difference Result 3511 states and 10009 transitions. [2021-03-10 21:36:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:25,537 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 21:36:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:25,541 INFO L225 Difference]: With dead ends: 3511 [2021-03-10 21:36:25,541 INFO L226 Difference]: Without dead ends: 3499 [2021-03-10 21:36:25,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2021-03-10 21:36:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 2792. [2021-03-10 21:36:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.9953421712647796) internal successors, (8360), 2791 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 8360 transitions. [2021-03-10 21:36:25,574 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 8360 transitions. Word has length 21 [2021-03-10 21:36:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:25,574 INFO L480 AbstractCegarLoop]: Abstraction has 2792 states and 8360 transitions. [2021-03-10 21:36:25,574 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 21:36:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 8360 transitions. [2021-03-10 21:36:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:25,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:25,576 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:25,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42052,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:25,777 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:25,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2135869886, now seen corresponding path program 393 times [2021-03-10 21:36:25,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:25,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339402101] [2021-03-10 21:36:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:25,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339402101] [2021-03-10 21:36:25,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994227279] [2021-03-10 21:36:25,853 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 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 21:36:25,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:36:25,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:25,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:25,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:25,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:36:25,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290931262] [2021-03-10 21:36:25,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:25,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:25,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:25,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:25,933 INFO L87 Difference]: Start difference. First operand 2792 states and 8360 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 21:36:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:26,058 INFO L93 Difference]: Finished difference Result 2946 states and 8690 transitions. [2021-03-10 21:36:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:36:26,060 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 21:36:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:26,063 INFO L225 Difference]: With dead ends: 2946 [2021-03-10 21:36:26,063 INFO L226 Difference]: Without dead ends: 2946 [2021-03-10 21:36:26,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:36:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-03-10 21:36:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2829. [2021-03-10 21:36:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 2.9954031117397455) internal successors, (8471), 2828 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 8471 transitions. [2021-03-10 21:36:26,092 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 8471 transitions. Word has length 21 [2021-03-10 21:36:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:26,092 INFO L480 AbstractCegarLoop]: Abstraction has 2829 states and 8471 transitions. [2021-03-10 21:36:26,092 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 21:36:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 8471 transitions. [2021-03-10 21:36:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:26,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:26,094 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42053 [2021-03-10 21:36:26,295 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash -314590977, now seen corresponding path program 394 times [2021-03-10 21:36:26,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069543052] [2021-03-10 21:36:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069543052] [2021-03-10 21:36:26,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846925831] [2021-03-10 21:36:26,383 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 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 21:36:26,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:26,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:26,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:26,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252859735] [2021-03-10 21:36:26,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:26,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:26,470 INFO L87 Difference]: Start difference. First operand 2829 states and 8471 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 21:36:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:26,738 INFO L93 Difference]: Finished difference Result 3527 states and 10081 transitions. [2021-03-10 21:36:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:36:26,739 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 21:36:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:26,743 INFO L225 Difference]: With dead ends: 3527 [2021-03-10 21:36:26,743 INFO L226 Difference]: Without dead ends: 3513 [2021-03-10 21:36:26,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-03-10 21:36:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2850. [2021-03-10 21:36:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2849 states have (on average 2.995085995085995) internal successors, (8533), 2849 states have internal predecessors, (8533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 8533 transitions. [2021-03-10 21:36:26,777 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 8533 transitions. Word has length 21 [2021-03-10 21:36:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:26,777 INFO L480 AbstractCegarLoop]: Abstraction has 2850 states and 8533 transitions. [2021-03-10 21:36:26,777 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 21:36:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 8533 transitions. [2021-03-10 21:36:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:26,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:26,779 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42054,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:26,980 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1499403032, now seen corresponding path program 395 times [2021-03-10 21:36:26,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18307680] [2021-03-10 21:36:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:27,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18307680] [2021-03-10 21:36:27,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248429261] [2021-03-10 21:36:27,069 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 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 21:36:27,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:27,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:27,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:27,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:27,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712490294] [2021-03-10 21:36:27,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:27,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:27,148 INFO L87 Difference]: Start difference. First operand 2850 states and 8533 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 21:36:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:27,365 INFO L93 Difference]: Finished difference Result 3031 states and 8881 transitions. [2021-03-10 21:36:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:36:27,366 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 21:36:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:27,369 INFO L225 Difference]: With dead ends: 3031 [2021-03-10 21:36:27,369 INFO L226 Difference]: Without dead ends: 3031 [2021-03-10 21:36:27,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-03-10 21:36:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 2849. [2021-03-10 21:36:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.995084269662921) internal successors, (8530), 2848 states have internal predecessors, (8530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 8530 transitions. [2021-03-10 21:36:27,399 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 8530 transitions. Word has length 21 [2021-03-10 21:36:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:27,399 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 8530 transitions. [2021-03-10 21:36:27,399 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 21:36:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 8530 transitions. [2021-03-10 21:36:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:27,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:27,402 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:27,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42055,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:27,602 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1431959877, now seen corresponding path program 396 times [2021-03-10 21:36:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:27,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061315002] [2021-03-10 21:36:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:27,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061315002] [2021-03-10 21:36:27,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741875701] [2021-03-10 21:36:27,697 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 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 21:36:27,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:36:27,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:27,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:27,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:27,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:27,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478502914] [2021-03-10 21:36:27,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:27,783 INFO L87 Difference]: Start difference. First operand 2849 states and 8530 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 21:36:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:27,891 INFO L93 Difference]: Finished difference Result 3200 states and 9309 transitions. [2021-03-10 21:36:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:27,892 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 21:36:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:27,895 INFO L225 Difference]: With dead ends: 3200 [2021-03-10 21:36:27,895 INFO L226 Difference]: Without dead ends: 3184 [2021-03-10 21:36:27,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-03-10 21:36:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2849. [2021-03-10 21:36:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.9947331460674156) internal successors, (8529), 2848 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 8529 transitions. [2021-03-10 21:36:27,921 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 8529 transitions. Word has length 21 [2021-03-10 21:36:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:27,921 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 8529 transitions. [2021-03-10 21:36:27,921 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 21:36:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 8529 transitions. [2021-03-10 21:36:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:27,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:27,924 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:28,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42056 [2021-03-10 21:36:28,124 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1051200258, now seen corresponding path program 397 times [2021-03-10 21:36:28,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:28,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823084706] [2021-03-10 21:36:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823084706] [2021-03-10 21:36:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517172875] [2021-03-10 21:36:28,224 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 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 21:36:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:28,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:28,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:28,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:28,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664260214] [2021-03-10 21:36:28,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:28,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:28,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:28,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:28,314 INFO L87 Difference]: Start difference. First operand 2849 states and 8529 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 21:36:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:28,617 INFO L93 Difference]: Finished difference Result 3136 states and 9159 transitions. [2021-03-10 21:36:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:36:28,619 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 21:36:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:28,622 INFO L225 Difference]: With dead ends: 3136 [2021-03-10 21:36:28,622 INFO L226 Difference]: Without dead ends: 3136 [2021-03-10 21:36:28,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:36:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-03-10 21:36:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2861. [2021-03-10 21:36:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 2.9947552447552446) internal successors, (8565), 2860 states have internal predecessors, (8565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 8565 transitions. [2021-03-10 21:36:28,653 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 8565 transitions. Word has length 21 [2021-03-10 21:36:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:28,653 INFO L480 AbstractCegarLoop]: Abstraction has 2861 states and 8565 transitions. [2021-03-10 21:36:28,653 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 21:36:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 8565 transitions. [2021-03-10 21:36:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:28,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:28,655 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:28,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42057 [2021-03-10 21:36:28,856 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1710657409, now seen corresponding path program 398 times [2021-03-10 21:36:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182656014] [2021-03-10 21:36:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:28,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182656014] [2021-03-10 21:36:28,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541219658] [2021-03-10 21:36:28,959 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 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 21:36:28,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:28,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:29,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:29,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:29,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452827109] [2021-03-10 21:36:29,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:29,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:29,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:29,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:29,043 INFO L87 Difference]: Start difference. First operand 2861 states and 8565 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 21:36:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:29,134 INFO L93 Difference]: Finished difference Result 3190 states and 9294 transitions. [2021-03-10 21:36:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:36:29,134 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 21:36:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:29,137 INFO L225 Difference]: With dead ends: 3190 [2021-03-10 21:36:29,137 INFO L226 Difference]: Without dead ends: 3172 [2021-03-10 21:36:29,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:36:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-03-10 21:36:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 2859. [2021-03-10 21:36:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.9954513645906227) internal successors, (8561), 2858 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 8561 transitions. [2021-03-10 21:36:29,164 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 8561 transitions. Word has length 21 [2021-03-10 21:36:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:29,164 INFO L480 AbstractCegarLoop]: Abstraction has 2859 states and 8561 transitions. [2021-03-10 21:36:29,164 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 21:36:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 8561 transitions. [2021-03-10 21:36:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:29,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:29,166 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:29,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42058 [2021-03-10 21:36:29,367 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1484476376, now seen corresponding path program 399 times [2021-03-10 21:36:29,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:29,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065572636] [2021-03-10 21:36:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:29,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065572636] [2021-03-10 21:36:29,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739108901] [2021-03-10 21:36:29,473 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 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 21:36:29,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:36:29,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:29,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:29,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:29,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:36:29,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067174567] [2021-03-10 21:36:29,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:29,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:29,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:29,565 INFO L87 Difference]: Start difference. First operand 2859 states and 8561 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 21:36:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:29,890 INFO L93 Difference]: Finished difference Result 3368 states and 9806 transitions. [2021-03-10 21:36:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:36:29,891 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 21:36:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:29,895 INFO L225 Difference]: With dead ends: 3368 [2021-03-10 21:36:29,895 INFO L226 Difference]: Without dead ends: 3368 [2021-03-10 21:36:29,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:36:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-03-10 21:36:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2877. [2021-03-10 21:36:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.9944367176634215) internal successors, (8612), 2876 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 8612 transitions. [2021-03-10 21:36:29,924 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 8612 transitions. Word has length 21 [2021-03-10 21:36:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:29,924 INFO L480 AbstractCegarLoop]: Abstraction has 2877 states and 8612 transitions. [2021-03-10 21:36:29,924 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 21:36:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 8612 transitions. [2021-03-10 21:36:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:29,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:29,926 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:30,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42059,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:30,127 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash -857679500, now seen corresponding path program 400 times [2021-03-10 21:36:30,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:30,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173855600] [2021-03-10 21:36:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173855600] [2021-03-10 21:36:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937486275] [2021-03-10 21:36:30,368 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 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 21:36:30,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:30,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:30,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:31,156 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:36:31,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:31,157 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 43 treesize of output 319 [2021-03-10 21:36:35,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:35,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:35,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:36:35,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:36:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:35,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:35,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 21:36:35,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52615663] [2021-03-10 21:36:35,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:36:35,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:36:35,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:36:35,162 INFO L87 Difference]: Start difference. First operand 2877 states and 8612 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:35,891 INFO L93 Difference]: Finished difference Result 2974 states and 8809 transitions. [2021-03-10 21:36:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:36:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:36:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:35,896 INFO L225 Difference]: With dead ends: 2974 [2021-03-10 21:36:35,896 INFO L226 Difference]: Without dead ends: 2941 [2021-03-10 21:36:35,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 840.0ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:36:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-03-10 21:36:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2898. [2021-03-10 21:36:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 2.9934414911977907) internal successors, (8672), 2897 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 8672 transitions. [2021-03-10 21:36:35,926 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 8672 transitions. Word has length 22 [2021-03-10 21:36:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:35,926 INFO L480 AbstractCegarLoop]: Abstraction has 2898 states and 8672 transitions. [2021-03-10 21:36:35,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 8672 transitions. [2021-03-10 21:36:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:35,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:35,928 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:36,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42060,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:36,151 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:36,151 INFO L82 PathProgramCache]: Analyzing trace with hash -599146780, now seen corresponding path program 401 times [2021-03-10 21:36:36,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:36,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281424095] [2021-03-10 21:36:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281424095] [2021-03-10 21:36:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460246981] [2021-03-10 21:36:36,329 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 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 21:36:36,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:36:36,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:36,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:36,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:37,037 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:36:37,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:37,038 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 43 treesize of output 319 [2021-03-10 21:36:40,034 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 950 [2021-03-10 21:36:40,661 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1685 DAG size of output: 1077 [2021-03-10 21:36:40,816 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1685 DAG size of output: 1077 [2021-03-10 21:36:40,952 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1694 DAG size of output: 1086 [2021-03-10 21:36:41,071 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1088 DAG size of output: 1055 [2021-03-10 21:36:42,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:42,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:42,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:36:42,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:36:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:42,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:42,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:36:42,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578187257] [2021-03-10 21:36:42,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:36:42,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:36:42,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:36:42,444 INFO L87 Difference]: Start difference. First operand 2898 states and 8672 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:43,097 INFO L93 Difference]: Finished difference Result 3004 states and 8897 transitions. [2021-03-10 21:36:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:36:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:36:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:43,102 INFO L225 Difference]: With dead ends: 3004 [2021-03-10 21:36:43,102 INFO L226 Difference]: Without dead ends: 2988 [2021-03-10 21:36:43,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:36:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-03-10 21:36:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2920. [2021-03-10 21:36:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2919 states have (on average 2.9969167523124356) internal successors, (8748), 2919 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 8748 transitions. [2021-03-10 21:36:43,130 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 8748 transitions. Word has length 22 [2021-03-10 21:36:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:43,130 INFO L480 AbstractCegarLoop]: Abstraction has 2920 states and 8748 transitions. [2021-03-10 21:36:43,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 8748 transitions. [2021-03-10 21:36:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:43,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:43,133 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:43,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43234 [2021-03-10 21:36:43,333 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:43,334 INFO L82 PathProgramCache]: Analyzing trace with hash 144436580, now seen corresponding path program 402 times [2021-03-10 21:36:43,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:43,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112207433] [2021-03-10 21:36:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:43,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112207433] [2021-03-10 21:36:43,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390674927] [2021-03-10 21:36:43,524 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 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 21:36:43,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:43,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:43,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:44,250 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:36:44,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:44,251 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 43 treesize of output 319 [2021-03-10 21:36:47,358 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 716 [2021-03-10 21:36:47,472 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 941 DAG size of output: 745 [2021-03-10 21:36:47,626 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 829 [2021-03-10 21:36:47,759 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1078 DAG size of output: 843 [2021-03-10 21:36:47,891 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1078 DAG size of output: 843 [2021-03-10 21:36:48,025 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 849 [2021-03-10 21:36:48,143 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 851 DAG size of output: 791 [2021-03-10 21:36:50,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:50,693 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:36:50,693 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:36:50,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:36:54,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:54,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:36:54,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:54,238 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:36:54,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:54,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:36:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:54,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:54,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:36:54,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540492396] [2021-03-10 21:36:54,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:36:54,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:36:54,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:36:54,288 INFO L87 Difference]: Start difference. First operand 2920 states and 8748 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:55,131 INFO L93 Difference]: Finished difference Result 3029 states and 8956 transitions. [2021-03-10 21:36:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:36:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:36:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:55,136 INFO L225 Difference]: With dead ends: 3029 [2021-03-10 21:36:55,136 INFO L226 Difference]: Without dead ends: 3019 [2021-03-10 21:36:55,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:36:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-03-10 21:36:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2920. [2021-03-10 21:36:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2919 states have (on average 2.9969167523124356) internal successors, (8748), 2919 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 8748 transitions. [2021-03-10 21:36:55,166 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 8748 transitions. Word has length 22 [2021-03-10 21:36:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:55,166 INFO L480 AbstractCegarLoop]: Abstraction has 2920 states and 8748 transitions. [2021-03-10 21:36:55,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 8748 transitions. [2021-03-10 21:36:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:36:55,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:55,169 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:55,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44752 [2021-03-10 21:36:55,369 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:55,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1666470026, now seen corresponding path program 403 times [2021-03-10 21:36:55,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:55,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661625476] [2021-03-10 21:36:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:55,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661625476] [2021-03-10 21:36:55,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696349803] [2021-03-10 21:36:55,556 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 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 21:36:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:55,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:36:55,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:56,253 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:36:56,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:56,254 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 43 treesize of output 319 [2021-03-10 21:37:00,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:00,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:00,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:37:00,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:37:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:00,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:00,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:37:00,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23548224] [2021-03-10 21:37:00,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:37:00,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:00,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:37:00,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:00,906 INFO L87 Difference]: Start difference. First operand 2920 states and 8748 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:01,734 INFO L93 Difference]: Finished difference Result 3070 states and 9137 transitions. [2021-03-10 21:37:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:37:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:37:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:01,739 INFO L225 Difference]: With dead ends: 3070 [2021-03-10 21:37:01,740 INFO L226 Difference]: Without dead ends: 3054 [2021-03-10 21:37:01,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:37:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-03-10 21:37:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2980. [2021-03-10 21:37:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.008056394763343) internal successors, (8961), 2979 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8961 transitions. [2021-03-10 21:37:01,774 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8961 transitions. Word has length 22 [2021-03-10 21:37:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:01,775 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 8961 transitions. [2021-03-10 21:37:01,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8961 transitions. [2021-03-10 21:37:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:01,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:01,777 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:01,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47091 [2021-03-10 21:37:01,978 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1884913910, now seen corresponding path program 404 times [2021-03-10 21:37:01,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:01,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230936292] [2021-03-10 21:37:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230936292] [2021-03-10 21:37:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314177012] [2021-03-10 21:37:02,212 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 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 21:37:02,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:02,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:02,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:02,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:02,962 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:37:02,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:02,963 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 43 treesize of output 319 [2021-03-10 21:37:05,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:06,346 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:37:06,347 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:37:06,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:37:10,940 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 1015 [2021-03-10 21:37:11,125 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 2104 DAG size of output: 1537 [2021-03-10 21:37:14,376 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1675 DAG size of output: 1281 [2021-03-10 21:37:14,741 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 3333 DAG size of output: 2442 [2021-03-10 21:37:15,084 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 3333 DAG size of output: 2442 [2021-03-10 21:37:15,486 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 3341 DAG size of output: 2369 [2021-03-10 21:37:15,930 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 2371 DAG size of output: 3478 [2021-03-10 21:37:17,015 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 2095 DAG size of output: 1391 [2021-03-10 21:37:18,589 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 2383 DAG size of output: 1187 [2021-03-10 21:37:18,748 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 2383 DAG size of output: 1187 [2021-03-10 21:37:18,891 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1189 [2021-03-10 21:37:20,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:20,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:37:20,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:20,271 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:20,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:20,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:37:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:20,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:20,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:37:20,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967369152] [2021-03-10 21:37:20,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:37:20,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:37:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:20,320 INFO L87 Difference]: Start difference. First operand 2980 states and 8961 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:21,085 INFO L93 Difference]: Finished difference Result 3116 states and 9234 transitions. [2021-03-10 21:37:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:37:21,085 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:37:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:21,089 INFO L225 Difference]: With dead ends: 3116 [2021-03-10 21:37:21,089 INFO L226 Difference]: Without dead ends: 3097 [2021-03-10 21:37:21,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:37:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-03-10 21:37:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 2977. [2021-03-10 21:37:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.006048387096774) internal successors, (8946), 2976 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 8946 transitions. [2021-03-10 21:37:21,118 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 8946 transitions. Word has length 22 [2021-03-10 21:37:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:21,118 INFO L480 AbstractCegarLoop]: Abstraction has 2977 states and 8946 transitions. [2021-03-10 21:37:21,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 8946 transitions. [2021-03-10 21:37:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:21,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:21,121 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:21,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48353,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:21,335 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1033769778, now seen corresponding path program 405 times [2021-03-10 21:37:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:21,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054461146] [2021-03-10 21:37:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:21,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054461146] [2021-03-10 21:37:21,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245335683] [2021-03-10 21:37:21,532 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 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 21:37:21,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:37:21,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:21,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:21,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:22,271 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:37:22,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:22,272 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 43 treesize of output 319 [2021-03-10 21:37:26,686 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1675 DAG size of output: 1046 [2021-03-10 21:37:26,819 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1902 DAG size of output: 1113 [2021-03-10 21:37:30,128 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 2137 DAG size of output: 1648 [2021-03-10 21:37:30,316 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 2265 DAG size of output: 1750 [2021-03-10 21:37:30,541 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 2636 DAG size of output: 1944 [2021-03-10 21:37:30,869 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 3743 DAG size of output: 2259 [2021-03-10 21:37:33,313 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 1127 [2021-03-10 21:37:33,528 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 2023 DAG size of output: 1460 [2021-03-10 21:37:33,847 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 5354 DAG size of output: 2107 [2021-03-10 21:37:37,433 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1149 [2021-03-10 21:37:37,637 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 1229 [2021-03-10 21:37:38,127 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 7255 DAG size of output: 2854 [2021-03-10 21:37:38,654 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 7255 DAG size of output: 2854 [2021-03-10 21:37:39,163 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 7264 DAG size of output: 2863 [2021-03-10 21:37:39,797 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 2865 DAG size of output: 3740 [2021-03-10 21:37:40,170 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 2461 DAG size of output: 2576 [2021-03-10 21:37:40,452 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 2310 DAG size of output: 2269 [2021-03-10 21:37:40,627 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 1099 [2021-03-10 21:37:41,652 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 1599 [2021-03-10 21:37:43,268 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 2512 DAG size of output: 863 [2021-03-10 21:37:43,380 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 739 [2021-03-10 21:37:43,497 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 739 [2021-03-10 21:37:43,652 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 3921 DAG size of output: 743 [2021-03-10 21:37:44,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:44,727 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:37:44,728 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:37:44,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:37:46,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:46,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:37:46,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:46,718 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:46,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:46,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:37:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:46,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:46,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:37:46,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916327675] [2021-03-10 21:37:46,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:37:46,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:37:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:46,768 INFO L87 Difference]: Start difference. First operand 2977 states and 8946 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:47,845 INFO L93 Difference]: Finished difference Result 3066 states and 9136 transitions. [2021-03-10 21:37:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:37:47,847 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:37:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:47,850 INFO L225 Difference]: With dead ends: 3066 [2021-03-10 21:37:47,850 INFO L226 Difference]: Without dead ends: 3056 [2021-03-10 21:37:47,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 805.9ms TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:37:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-03-10 21:37:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2980. [2021-03-10 21:37:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.0060422960725077) internal successors, (8955), 2979 states have internal predecessors, (8955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8955 transitions. [2021-03-10 21:37:47,880 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8955 transitions. Word has length 22 [2021-03-10 21:37:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:47,880 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 8955 transitions. [2021-03-10 21:37:47,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8955 transitions. [2021-03-10 21:37:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:47,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:47,883 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:48,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52192 [2021-03-10 21:37:48,084 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:48,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1113853020, now seen corresponding path program 406 times [2021-03-10 21:37:48,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:48,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220881628] [2021-03-10 21:37:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:48,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220881628] [2021-03-10 21:37:48,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344975218] [2021-03-10 21:37:48,269 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 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 21:37:48,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:48,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:48,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:48,980 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:37:48,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:48,981 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 43 treesize of output 319 [2021-03-10 21:37:51,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:51,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:51,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:37:51,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:37:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:51,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:51,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:37:51,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632338080] [2021-03-10 21:37:51,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:37:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:37:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:51,841 INFO L87 Difference]: Start difference. First operand 2980 states and 8955 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:52,508 INFO L93 Difference]: Finished difference Result 3123 states and 9319 transitions. [2021-03-10 21:37:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:37:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:37:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:52,512 INFO L225 Difference]: With dead ends: 3123 [2021-03-10 21:37:52,512 INFO L226 Difference]: Without dead ends: 3107 [2021-03-10 21:37:52,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:37:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-03-10 21:37:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3031. [2021-03-10 21:37:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 3.0145214521452144) internal successors, (9134), 3030 states have internal predecessors, (9134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 9134 transitions. [2021-03-10 21:37:52,542 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 9134 transitions. Word has length 22 [2021-03-10 21:37:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:52,542 INFO L480 AbstractCegarLoop]: Abstraction has 3031 states and 9134 transitions. [2021-03-10 21:37:52,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 9134 transitions. [2021-03-10 21:37:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:52,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:52,544 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:52,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56761 [2021-03-10 21:37:52,745 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:52,745 INFO L82 PathProgramCache]: Analyzing trace with hash -370269660, now seen corresponding path program 407 times [2021-03-10 21:37:52,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:52,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958761588] [2021-03-10 21:37:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:52,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958761588] [2021-03-10 21:37:52,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097721682] [2021-03-10 21:37:52,958 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 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 21:37:52,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:37:52,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:52,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:52,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:53,672 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:37:53,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:53,673 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 43 treesize of output 319 [2021-03-10 21:37:54,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:55,593 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:37:55,593 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:37:55,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:37:58,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:58,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:37:58,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:58,034 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:37:58,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:58,035 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:37:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:58,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:58,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:37:58,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978196259] [2021-03-10 21:37:58,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:37:58,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:37:58,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:58,084 INFO L87 Difference]: Start difference. First operand 3031 states and 9134 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:59,368 INFO L93 Difference]: Finished difference Result 3229 states and 9558 transitions. [2021-03-10 21:37:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:37:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:37:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:59,373 INFO L225 Difference]: With dead ends: 3229 [2021-03-10 21:37:59,373 INFO L226 Difference]: Without dead ends: 3203 [2021-03-10 21:37:59,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 935.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:37:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-03-10 21:37:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 3035. [2021-03-10 21:37:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 3034 states have (on average 3.0141727092946606) internal successors, (9145), 3034 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 21:37:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 9145 transitions. [2021-03-10 21:37:59,409 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 9145 transitions. Word has length 22 [2021-03-10 21:37:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:59,409 INFO L480 AbstractCegarLoop]: Abstraction has 3035 states and 9145 transitions. [2021-03-10 21:37:59,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 9145 transitions. [2021-03-10 21:37:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:37:59,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:59,412 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:59,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57674,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:59,612 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash 480874472, now seen corresponding path program 408 times [2021-03-10 21:37:59,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:59,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298054018] [2021-03-10 21:37:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:59,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298054018] [2021-03-10 21:37:59,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202664342] [2021-03-10 21:37:59,793 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 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 21:37:59,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:37:59,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:59,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:37:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:00,513 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:38:00,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:00,514 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 43 treesize of output 319 [2021-03-10 21:38:02,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:03,112 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:38:03,113 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:38:03,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:38:04,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:04,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:38:04,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:04,797 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:04,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:04,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:38:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:04,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:04,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:38:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469001836] [2021-03-10 21:38:04,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:38:04,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:04,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:38:04,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:38:04,846 INFO L87 Difference]: Start difference. First operand 3035 states and 9145 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:05,885 INFO L93 Difference]: Finished difference Result 3128 states and 9349 transitions. [2021-03-10 21:38:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:38:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:38:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:05,890 INFO L225 Difference]: With dead ends: 3128 [2021-03-10 21:38:05,890 INFO L226 Difference]: Without dead ends: 3118 [2021-03-10 21:38:05,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:38:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-03-10 21:38:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 3041. [2021-03-10 21:38:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 3.014144736842105) internal successors, (9163), 3040 states have internal predecessors, (9163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 9163 transitions. [2021-03-10 21:38:05,920 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 9163 transitions. Word has length 22 [2021-03-10 21:38:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:05,920 INFO L480 AbstractCegarLoop]: Abstraction has 3041 states and 9163 transitions. [2021-03-10 21:38:05,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 9163 transitions. [2021-03-10 21:38:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:05,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:05,923 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:06,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58709,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:06,124 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1096538788, now seen corresponding path program 409 times [2021-03-10 21:38:06,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:06,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205152640] [2021-03-10 21:38:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:06,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205152640] [2021-03-10 21:38:06,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577277858] [2021-03-10 21:38:06,297 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 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 21:38:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:06,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:07,068 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:38:07,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:07,068 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 43 treesize of output 319 [2021-03-10 21:38:11,486 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 2400 DAG size of output: 1074 [2021-03-10 21:38:13,290 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 3714 DAG size of output: 1210 [2021-03-10 21:38:17,627 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 2861 DAG size of output: 1190 [2021-03-10 21:38:17,902 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 6123 DAG size of output: 1991 [2021-03-10 21:38:18,189 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 6123 DAG size of output: 1991 [2021-03-10 21:38:18,508 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 6132 DAG size of output: 2000 [2021-03-10 21:38:18,647 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1997 DAG size of output: 1849 [2021-03-10 21:38:18,834 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1851 DAG size of output: 2027 [2021-03-10 21:38:20,375 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 2006 DAG size of output: 964 [2021-03-10 21:38:20,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:21,490 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:38:21,491 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:38:21,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:38:26,163 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 955 DAG size of output: 832 [2021-03-10 21:38:26,275 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 974 DAG size of output: 849 [2021-03-10 21:38:28,793 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 942 DAG size of output: 870 [2021-03-10 21:38:29,024 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1638 DAG size of output: 1529 [2021-03-10 21:38:29,332 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 2132 DAG size of output: 1902 [2021-03-10 21:38:29,690 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 2192 DAG size of output: 1955 [2021-03-10 21:38:34,398 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 803 [2021-03-10 21:38:34,546 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1249 DAG size of output: 988 [2021-03-10 21:38:34,742 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1291 DAG size of output: 1021 [2021-03-10 21:38:34,938 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1657 DAG size of output: 1222 [2021-03-10 21:38:35,149 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1710 DAG size of output: 1276 [2021-03-10 21:38:35,705 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 3422 DAG size of output: 2780 [2021-03-10 21:38:36,244 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 3422 DAG size of output: 2780 [2021-03-10 21:38:36,853 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 3430 DAG size of output: 2612 [2021-03-10 21:38:37,461 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 2614 DAG size of output: 3246 [2021-03-10 21:38:37,782 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 2342 DAG size of output: 2319 [2021-03-10 21:38:37,900 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1120 DAG size of output: 1120 [2021-03-10 21:38:38,065 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1075 DAG size of output: 1151 [2021-03-10 21:38:38,368 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 883 [2021-03-10 21:38:41,005 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1618 DAG size of output: 1046 [2021-03-10 21:38:41,152 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1634 DAG size of output: 1054 [2021-03-10 21:38:41,359 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 2719 DAG size of output: 1279 [2021-03-10 21:38:41,568 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1793 DAG size of output: 1408 [2021-03-10 21:38:44,100 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1961 DAG size of output: 1065 [2021-03-10 21:38:44,405 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 4169 DAG size of output: 1598 [2021-03-10 21:38:44,685 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 4169 DAG size of output: 1598 [2021-03-10 21:38:44,991 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 4174 DAG size of output: 1602 [2021-03-10 21:38:45,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:45,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:38:45,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:45,910 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:38:45,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:45,911 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:38:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:45,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:45,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:38:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171662191] [2021-03-10 21:38:45,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:38:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:38:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:38:45,955 INFO L87 Difference]: Start difference. First operand 3041 states and 9163 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:46,821 INFO L93 Difference]: Finished difference Result 3154 states and 9407 transitions. [2021-03-10 21:38:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:38:46,822 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:38:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:46,826 INFO L225 Difference]: With dead ends: 3154 [2021-03-10 21:38:46,826 INFO L226 Difference]: Without dead ends: 3144 [2021-03-10 21:38:46,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 895.9ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:38:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-03-10 21:38:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3041. [2021-03-10 21:38:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 3.014144736842105) internal successors, (9163), 3040 states have internal predecessors, (9163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 9163 transitions. [2021-03-10 21:38:46,859 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 9163 transitions. Word has length 22 [2021-03-10 21:38:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:46,859 INFO L480 AbstractCegarLoop]: Abstraction has 3041 states and 9163 transitions. [2021-03-10 21:38:46,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 9163 transitions. [2021-03-10 21:38:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:46,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:46,861 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:47,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59631,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:47,063 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash -227504460, now seen corresponding path program 410 times [2021-03-10 21:38:47,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:47,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145912982] [2021-03-10 21:38:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:38:47,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145912982] [2021-03-10 21:38:47,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659061213] [2021-03-10 21:38:47,200 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 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 21:38:47,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:38:47,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:47,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:47,903 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:38:47,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:47,904 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 43 treesize of output 319 [2021-03-10 21:38:49,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:49,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:49,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:38:49,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:38:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:49,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:49,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-10 21:38:49,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265709429] [2021-03-10 21:38:49,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:38:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:38:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:38:49,814 INFO L87 Difference]: Start difference. First operand 3041 states and 9163 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 21:38:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:50,200 INFO L93 Difference]: Finished difference Result 3072 states and 9207 transitions. [2021-03-10 21:38:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:38:50,201 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 21:38:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:50,205 INFO L225 Difference]: With dead ends: 3072 [2021-03-10 21:38:50,205 INFO L226 Difference]: Without dead ends: 3054 [2021-03-10 21:38:50,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:38:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-03-10 21:38:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 3041. [2021-03-10 21:38:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 3.013157894736842) internal successors, (9160), 3040 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 9160 transitions. [2021-03-10 21:38:50,234 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 9160 transitions. Word has length 22 [2021-03-10 21:38:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:50,234 INFO L480 AbstractCegarLoop]: Abstraction has 3041 states and 9160 transitions. [2021-03-10 21:38:50,234 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 21:38:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 9160 transitions. [2021-03-10 21:38:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:38:50,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:50,237 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:50,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67815 [2021-03-10 21:38:50,437 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash 158696654, now seen corresponding path program 411 times [2021-03-10 21:38:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:50,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984337337] [2021-03-10 21:38:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:50,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984337337] [2021-03-10 21:38:50,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259033319] [2021-03-10 21:38:50,586 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 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 21:38:50,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:38:50,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:50,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:38:50,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:51,256 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:38:51,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:51,257 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 43 treesize of output 319 [2021-03-10 21:38:54,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:54,811 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:38:54,811 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:38:54,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:38:58,742 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1682 DAG size of output: 1421 [2021-03-10 21:39:01,712 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1864 DAG size of output: 1579 [2021-03-10 21:39:02,116 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 3034 DAG size of output: 2545 [2021-03-10 21:39:02,523 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 3283 DAG size of output: 2759 [2021-03-10 21:39:02,933 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 3283 DAG size of output: 2759 [2021-03-10 21:39:03,407 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 3291 DAG size of output: 2676 [2021-03-10 21:39:03,868 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 2678 DAG size of output: 2677 [2021-03-10 21:39:04,131 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 1905 DAG size of output: 1378 [2021-03-10 21:39:04,305 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 1147 [2021-03-10 21:39:05,473 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 845 [2021-03-10 21:39:05,630 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1975 DAG size of output: 1073 [2021-03-10 21:39:05,779 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1333 DAG size of output: 1302 [2021-03-10 21:39:05,954 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1123 DAG size of output: 1282 [2021-03-10 21:39:06,162 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1081 DAG size of output: 1460 [2021-03-10 21:39:06,286 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 797 [2021-03-10 21:39:08,305 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1759 DAG size of output: 980 [2021-03-10 21:39:08,798 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 3776 DAG size of output: 1133 [2021-03-10 21:39:09,040 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 3776 DAG size of output: 1133 [2021-03-10 21:39:09,263 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 3781 DAG size of output: 1144 [2021-03-10 21:39:09,394 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1146 DAG size of output: 852 [2021-03-10 21:39:09,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:09,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:39:09,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:09,937 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:09,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:09,938 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:39:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:09,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:09,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-03-10 21:39:09,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899914321] [2021-03-10 21:39:09,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:39:09,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:39:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:39:09,982 INFO L87 Difference]: Start difference. First operand 3041 states and 9160 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 21:39:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:10,853 INFO L93 Difference]: Finished difference Result 3182 states and 9450 transitions. [2021-03-10 21:39:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:39:10,854 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 21:39:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:10,858 INFO L225 Difference]: With dead ends: 3182 [2021-03-10 21:39:10,858 INFO L226 Difference]: Without dead ends: 3172 [2021-03-10 21:39:10,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:39:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-03-10 21:39:10,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3040. [2021-03-10 21:39:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3039 states have (on average 3.013162224415926) internal successors, (9157), 3039 states have internal predecessors, (9157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 9157 transitions. [2021-03-10 21:39:10,888 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 9157 transitions. Word has length 22 [2021-03-10 21:39:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:10,888 INFO L480 AbstractCegarLoop]: Abstraction has 3040 states and 9157 transitions. [2021-03-10 21:39:10,888 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 21:39:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 9157 transitions. [2021-03-10 21:39:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:10,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:10,891 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:11,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68408 [2021-03-10 21:39:11,091 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:11,091 INFO L82 PathProgramCache]: Analyzing trace with hash 696552232, now seen corresponding path program 412 times [2021-03-10 21:39:11,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:11,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886726748] [2021-03-10 21:39:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:11,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886726748] [2021-03-10 21:39:11,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081841526] [2021-03-10 21:39:11,257 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 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 21:39:11,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:39:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:11,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:11,936 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:39:11,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:11,937 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 43 treesize of output 319 [2021-03-10 21:39:13,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:14,368 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:39:14,369 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:39:14,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:39:18,500 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1487 DAG size of output: 1156 [2021-03-10 21:39:18,681 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 2121 DAG size of output: 1597 [2021-03-10 21:39:18,876 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 2131 DAG size of output: 1605 [2021-03-10 21:39:19,070 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 2131 DAG size of output: 1605 [2021-03-10 21:39:19,274 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2137 DAG size of output: 1607 [2021-03-10 21:39:19,491 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 1609 DAG size of output: 1810 [2021-03-10 21:39:19,665 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1181 [2021-03-10 21:39:22,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:22,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:39:22,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:22,126 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:22,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:22,127 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:39:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:22,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:22,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:39:22,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999740769] [2021-03-10 21:39:22,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:39:22,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:39:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:39:22,171 INFO L87 Difference]: Start difference. First operand 3040 states and 9157 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:23,162 INFO L93 Difference]: Finished difference Result 3274 states and 9666 transitions. [2021-03-10 21:39:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:39:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:39:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:23,167 INFO L225 Difference]: With dead ends: 3274 [2021-03-10 21:39:23,167 INFO L226 Difference]: Without dead ends: 3245 [2021-03-10 21:39:23,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:39:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-03-10 21:39:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3029. [2021-03-10 21:39:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.010568031704095) internal successors, (9116), 3028 states have internal predecessors, (9116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 9116 transitions. [2021-03-10 21:39:23,198 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 9116 transitions. Word has length 22 [2021-03-10 21:39:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:23,198 INFO L480 AbstractCegarLoop]: Abstraction has 3029 states and 9116 transitions. [2021-03-10 21:39:23,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 9116 transitions. [2021-03-10 21:39:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:23,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:23,201 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:23,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71738,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:23,401 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:23,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1312216548, now seen corresponding path program 413 times [2021-03-10 21:39:23,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:23,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591181563] [2021-03-10 21:39:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:23,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591181563] [2021-03-10 21:39:23,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95679617] [2021-03-10 21:39:23,573 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 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 21:39:23,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:39:23,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:23,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:24,287 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:39:24,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:24,288 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 43 treesize of output 319 [2021-03-10 21:39:26,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:26,876 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:39:26,876 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:39:26,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:39:28,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:28,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:39:28,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:28,356 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:39:28,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:28,357 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:39:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:28,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:28,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:39:28,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443973033] [2021-03-10 21:39:28,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:39:28,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:39:28,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:39:28,403 INFO L87 Difference]: Start difference. First operand 3029 states and 9116 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:29,297 INFO L93 Difference]: Finished difference Result 3167 states and 9407 transitions. [2021-03-10 21:39:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:39:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:39:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:29,302 INFO L225 Difference]: With dead ends: 3167 [2021-03-10 21:39:29,302 INFO L226 Difference]: Without dead ends: 3157 [2021-03-10 21:39:29,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 842.9ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:39:29,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-03-10 21:39:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3029. [2021-03-10 21:39:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.010568031704095) internal successors, (9116), 3028 states have internal predecessors, (9116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 9116 transitions. [2021-03-10 21:39:29,332 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 9116 transitions. Word has length 22 [2021-03-10 21:39:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:29,332 INFO L480 AbstractCegarLoop]: Abstraction has 3029 states and 9116 transitions. [2021-03-10 21:39:29,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 9116 transitions. [2021-03-10 21:39:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:29,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:29,334 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:29,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73928,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:29,535 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1404521526, now seen corresponding path program 414 times [2021-03-10 21:39:29,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:29,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592686848] [2021-03-10 21:39:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:29,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592686848] [2021-03-10 21:39:29,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596913208] [2021-03-10 21:39:29,704 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 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 21:39:29,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:39:29,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:29,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:29,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:30,404 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:39:30,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:30,404 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 43 treesize of output 319 [2021-03-10 21:39:35,338 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1452 DAG size of output: 1087 [2021-03-10 21:39:35,532 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 2302 DAG size of output: 1617 [2021-03-10 21:39:35,730 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 2302 DAG size of output: 1617 [2021-03-10 21:39:35,930 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 2308 DAG size of output: 1623 [2021-03-10 21:39:36,151 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1625 DAG size of output: 1715 [2021-03-10 21:39:36,270 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1317 DAG size of output: 1255 [2021-03-10 21:39:38,395 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 2299 DAG size of output: 1260 [2021-03-10 21:39:38,546 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 2299 DAG size of output: 1260 [2021-03-10 21:39:38,732 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 2304 DAG size of output: 1265 [2021-03-10 21:39:39,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:39,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:39,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:39:39,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:39:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:39,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:39:39,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143110824] [2021-03-10 21:39:39,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:39:39,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:39,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:39:39,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:39:39,881 INFO L87 Difference]: Start difference. First operand 3029 states and 9116 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:40,803 INFO L93 Difference]: Finished difference Result 3185 states and 9526 transitions. [2021-03-10 21:39:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:39:40,804 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:39:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:40,808 INFO L225 Difference]: With dead ends: 3185 [2021-03-10 21:39:40,808 INFO L226 Difference]: Without dead ends: 3167 [2021-03-10 21:39:40,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:39:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-03-10 21:39:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3093. [2021-03-10 21:39:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.0197283311772316) internal successors, (9337), 3092 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 9337 transitions. [2021-03-10 21:39:40,839 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 9337 transitions. Word has length 22 [2021-03-10 21:39:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:40,839 INFO L480 AbstractCegarLoop]: Abstraction has 3093 states and 9337 transitions. [2021-03-10 21:39:40,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 9337 transitions. [2021-03-10 21:39:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:39:40,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:40,841 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:41,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74966 [2021-03-10 21:39:41,042 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:41,042 INFO L82 PathProgramCache]: Analyzing trace with hash -660938166, now seen corresponding path program 415 times [2021-03-10 21:39:41,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:41,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654823915] [2021-03-10 21:39:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:39:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654823915] [2021-03-10 21:39:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661955639] [2021-03-10 21:39:41,216 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 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 21:39:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:41,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:39:41,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:41,914 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:39:41,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:41,915 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 43 treesize of output 319 [2021-03-10 21:39:46,347 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1125 [2021-03-10 21:39:47,585 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 2194 DAG size of output: 1485 [2021-03-10 21:39:50,775 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1633 DAG size of output: 1073 [2021-03-10 21:39:50,920 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 2084 DAG size of output: 1316 [2021-03-10 21:39:51,253 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 3741 DAG size of output: 2329 [2021-03-10 21:39:51,652 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 3848 DAG size of output: 2424 [2021-03-10 21:39:52,055 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 4425 DAG size of output: 2785 [2021-03-10 21:39:52,492 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 4425 DAG size of output: 2785 [2021-03-10 21:39:52,903 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 4431 DAG size of output: 2791 [2021-03-10 21:39:53,133 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 2792 DAG size of output: 2674 [2021-03-10 21:39:53,409 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 2253 DAG size of output: 2091 [2021-03-10 21:39:54,231 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1982 [2021-03-10 21:39:54,348 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1342 DAG size of output: 1141 [2021-03-10 21:39:55,513 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 2213 DAG size of output: 1005 [2021-03-10 21:39:55,623 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 2213 DAG size of output: 1005 [2021-03-10 21:39:55,732 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 2218 DAG size of output: 1010 [2021-03-10 21:39:56,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:56,911 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:39:56,912 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:39:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:40:01,160 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1725 DAG size of output: 1014 [2021-03-10 21:40:03,372 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1062 DAG size of output: 938 [2021-03-10 21:40:03,504 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1244 DAG size of output: 1049 [2021-03-10 21:40:03,655 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1423 DAG size of output: 1225 [2021-03-10 21:40:05,221 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1288 DAG size of output: 1001 [2021-03-10 21:40:05,337 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1482 DAG size of output: 1118 [2021-03-10 21:40:05,472 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1663 DAG size of output: 1295 [2021-03-10 21:40:05,719 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 2674 DAG size of output: 1730 [2021-03-10 21:40:05,973 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 2709 DAG size of output: 1760 [2021-03-10 21:40:06,411 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 4014 DAG size of output: 2391 [2021-03-10 21:40:06,817 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 4014 DAG size of output: 2391 [2021-03-10 21:40:07,256 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 4020 DAG size of output: 2393 [2021-03-10 21:40:07,540 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 2395 DAG size of output: 1874 [2021-03-10 21:40:07,952 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 1816 DAG size of output: 2040 [2021-03-10 21:40:08,082 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 995 [2021-03-10 21:40:08,903 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 877 DAG size of output: 923 [2021-03-10 21:40:10,269 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1429 DAG size of output: 1419 [2021-03-10 21:40:13,371 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1837 DAG size of output: 1037 [2021-03-10 21:40:13,646 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 2684 DAG size of output: 1544 [2021-03-10 21:40:13,908 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 2796 DAG size of output: 1600 [2021-03-10 21:40:14,170 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 2796 DAG size of output: 1600 [2021-03-10 21:40:14,442 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 2799 DAG size of output: 1602 [2021-03-10 21:40:14,689 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1604 DAG size of output: 1386 [2021-03-10 21:40:15,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:15,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:40:15,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:15,617 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:15,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:15,618 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:40:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:15,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:15,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:40:15,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636883216] [2021-03-10 21:40:15,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:40:15,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:40:15,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:40:15,668 INFO L87 Difference]: Start difference. First operand 3093 states and 9337 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:17,415 INFO L93 Difference]: Finished difference Result 3353 states and 9932 transitions. [2021-03-10 21:40:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:40:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:40:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:17,420 INFO L225 Difference]: With dead ends: 3353 [2021-03-10 21:40:17,420 INFO L226 Difference]: Without dead ends: 3327 [2021-03-10 21:40:17,420 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1023.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:40:17,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-03-10 21:40:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3101. [2021-03-10 21:40:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.020967741935484) internal successors, (9365), 3100 states have internal predecessors, (9365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9365 transitions. [2021-03-10 21:40:17,455 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9365 transitions. Word has length 22 [2021-03-10 21:40:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:17,455 INFO L480 AbstractCegarLoop]: Abstraction has 3101 states and 9365 transitions. [2021-03-10 21:40:17,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9365 transitions. [2021-03-10 21:40:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:17,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:17,458 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:17,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77433,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:17,659 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash 190205966, now seen corresponding path program 416 times [2021-03-10 21:40:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:17,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340763148] [2021-03-10 21:40:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:17,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340763148] [2021-03-10 21:40:17,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907318173] [2021-03-10 21:40:17,883 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 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 21:40:17,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:40:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:17,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:18,748 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:40:18,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:18,749 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 43 treesize of output 319 [2021-03-10 21:40:21,157 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 1052 [2021-03-10 21:40:21,269 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 1052 [2021-03-10 21:40:21,381 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 1061 [2021-03-10 21:40:22,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:23,442 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:40:23,443 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:40:23,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:40:25,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:25,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:40:25,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:25,853 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:25,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:25,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:40:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:25,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:25,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:40:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811223653] [2021-03-10 21:40:25,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:40:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:40:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:25,912 INFO L87 Difference]: Start difference. First operand 3101 states and 9365 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:27,833 INFO L93 Difference]: Finished difference Result 3506 states and 10303 transitions. [2021-03-10 21:40:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:40:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:40:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:27,838 INFO L225 Difference]: With dead ends: 3506 [2021-03-10 21:40:27,839 INFO L226 Difference]: Without dead ends: 3464 [2021-03-10 21:40:27,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1371.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1990, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:40:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-03-10 21:40:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3097. [2021-03-10 21:40:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 3096 states have (on average 3.0180878552971575) internal successors, (9344), 3096 states have internal predecessors, (9344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 9344 transitions. [2021-03-10 21:40:27,877 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 9344 transitions. Word has length 22 [2021-03-10 21:40:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:27,877 INFO L480 AbstractCegarLoop]: Abstraction has 3097 states and 9344 transitions. [2021-03-10 21:40:27,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 9344 transitions. [2021-03-10 21:40:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:27,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:27,879 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:28,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83939,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:28,080 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash 805870282, now seen corresponding path program 417 times [2021-03-10 21:40:28,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:28,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987823004] [2021-03-10 21:40:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:28,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987823004] [2021-03-10 21:40:28,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165221891] [2021-03-10 21:40:28,298 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 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 21:40:28,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:40:28,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:28,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:29,161 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:40:29,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:29,162 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 43 treesize of output 319 [2021-03-10 21:40:30,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:31,642 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:40:31,643 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:40:31,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:40:33,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:33,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:40:33,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:33,372 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:33,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:33,374 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:40:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:33,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:33,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:40:33,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869530415] [2021-03-10 21:40:33,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:40:33,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:40:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:33,423 INFO L87 Difference]: Start difference. First operand 3097 states and 9344 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:34,422 INFO L93 Difference]: Finished difference Result 3262 states and 9709 transitions. [2021-03-10 21:40:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:40:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:40:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:34,427 INFO L225 Difference]: With dead ends: 3262 [2021-03-10 21:40:34,427 INFO L226 Difference]: Without dead ends: 3252 [2021-03-10 21:40:34,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1100.0ms TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:40:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-03-10 21:40:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 3102. [2021-03-10 21:40:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.018058690744921) internal successors, (9359), 3101 states have internal predecessors, (9359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 9359 transitions. [2021-03-10 21:40:34,461 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 9359 transitions. Word has length 22 [2021-03-10 21:40:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:34,461 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 9359 transitions. [2021-03-10 21:40:34,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 9359 transitions. [2021-03-10 21:40:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:34,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:34,464 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:34,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85405,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:34,665 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1583372402, now seen corresponding path program 418 times [2021-03-10 21:40:34,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:34,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955998359] [2021-03-10 21:40:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:34,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955998359] [2021-03-10 21:40:34,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967339870] [2021-03-10 21:40:34,879 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 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 21:40:34,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:40:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:34,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:35,717 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:40:35,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:35,718 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 43 treesize of output 319 [2021-03-10 21:40:37,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:38,027 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:40:38,027 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:40:38,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:40:41,583 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1064 DAG size of output: 732 [2021-03-10 21:40:42,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:42,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:40:42,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:42,724 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:40:42,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:42,726 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:40:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:42,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:42,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:40:42,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103947401] [2021-03-10 21:40:42,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:40:42,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:42,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:40:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:42,785 INFO L87 Difference]: Start difference. First operand 3102 states and 9359 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:43,875 INFO L93 Difference]: Finished difference Result 3292 states and 9780 transitions. [2021-03-10 21:40:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:40:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:40:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:43,881 INFO L225 Difference]: With dead ends: 3292 [2021-03-10 21:40:43,881 INFO L226 Difference]: Without dead ends: 3282 [2021-03-10 21:40:43,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1181.2ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:40:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-03-10 21:40:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3102. [2021-03-10 21:40:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.018058690744921) internal successors, (9359), 3101 states have internal predecessors, (9359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 9359 transitions. [2021-03-10 21:40:43,941 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 9359 transitions. Word has length 22 [2021-03-10 21:40:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:43,941 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 9359 transitions. [2021-03-10 21:40:43,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 9359 transitions. [2021-03-10 21:40:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:43,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:43,944 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:44,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86327 [2021-03-10 21:40:44,144 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2131428492, now seen corresponding path program 419 times [2021-03-10 21:40:44,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:44,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146044377] [2021-03-10 21:40:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:40:44,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146044377] [2021-03-10 21:40:44,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122140349] [2021-03-10 21:40:44,350 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 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 21:40:44,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:40:44,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:44,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:45,178 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:40:45,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:45,179 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 43 treesize of output 319 [2021-03-10 21:40:47,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:47,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:47,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:40:47,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:40:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:47,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:47,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-10 21:40:47,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349808942] [2021-03-10 21:40:47,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:40:47,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:40:47,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:40:47,018 INFO L87 Difference]: Start difference. First operand 3102 states and 9359 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 21:40:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:47,542 INFO L93 Difference]: Finished difference Result 3132 states and 9402 transitions. [2021-03-10 21:40:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:40:47,543 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 21:40:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:47,547 INFO L225 Difference]: With dead ends: 3132 [2021-03-10 21:40:47,547 INFO L226 Difference]: Without dead ends: 3114 [2021-03-10 21:40:47,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:40:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2021-03-10 21:40:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 3102. [2021-03-10 21:40:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.016768784263141) internal successors, (9355), 3101 states have internal predecessors, (9355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 9355 transitions. [2021-03-10 21:40:47,580 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 9355 transitions. Word has length 22 [2021-03-10 21:40:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:47,580 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 9355 transitions. [2021-03-10 21:40:47,580 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 21:40:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 9355 transitions. [2021-03-10 21:40:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:40:47,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:47,582 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:47,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87738 [2021-03-10 21:40:47,783 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -591707484, now seen corresponding path program 420 times [2021-03-10 21:40:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:47,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869286610] [2021-03-10 21:40:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:47,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869286610] [2021-03-10 21:40:47,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312005384] [2021-03-10 21:40:47,989 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 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 21:40:48,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:40:48,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:48,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:40:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:48,786 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:40:48,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:48,787 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 43 treesize of output 319 [2021-03-10 21:40:52,981 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1460 DAG size of output: 1180 [2021-03-10 21:40:55,619 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 978 DAG size of output: 639 [2021-03-10 21:40:56,046 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1432 DAG size of output: 969 [2021-03-10 21:40:56,304 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 2449 DAG size of output: 1824 [2021-03-10 21:40:56,579 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 2737 DAG size of output: 1862 [2021-03-10 21:40:56,921 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 2989 DAG size of output: 2041 [2021-03-10 21:40:57,229 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 2989 DAG size of output: 2041 [2021-03-10 21:40:57,551 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 2998 DAG size of output: 2050 [2021-03-10 21:40:57,944 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 2052 DAG size of output: 2634 [2021-03-10 21:40:58,146 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1896 DAG size of output: 1684 [2021-03-10 21:40:58,332 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1537 DAG size of output: 1451 [2021-03-10 21:40:59,149 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 1399 DAG size of output: 1626 [2021-03-10 21:41:00,455 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 972 [2021-03-10 21:41:01,919 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1654 DAG size of output: 824 [2021-03-10 21:41:02,034 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 2097 DAG size of output: 1034 [2021-03-10 21:41:02,282 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 3208 DAG size of output: 1072 [2021-03-10 21:41:02,439 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 3208 DAG size of output: 1072 [2021-03-10 21:41:02,602 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 3212 DAG size of output: 1076 [2021-03-10 21:41:03,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:04,337 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:41:04,337 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:41:04,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:41:08,991 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1765 DAG size of output: 1183 [2021-03-10 21:41:09,187 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1765 DAG size of output: 1183 [2021-03-10 21:41:09,388 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1771 DAG size of output: 1178 [2021-03-10 21:41:09,612 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 1236 [2021-03-10 21:41:09,803 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1152 DAG size of output: 1248 [2021-03-10 21:41:11,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:11,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:41:11,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:11,967 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:11,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:11,969 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:41:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:12,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:12,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:41:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955961153] [2021-03-10 21:41:12,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:41:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:41:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:41:12,036 INFO L87 Difference]: Start difference. First operand 3102 states and 9355 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:13,337 INFO L93 Difference]: Finished difference Result 3405 states and 10085 transitions. [2021-03-10 21:41:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:41:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:41:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:13,342 INFO L225 Difference]: With dead ends: 3405 [2021-03-10 21:41:13,342 INFO L226 Difference]: Without dead ends: 3395 [2021-03-10 21:41:13,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1083.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:41:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-03-10 21:41:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3101. [2021-03-10 21:41:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.016774193548387) internal successors, (9352), 3100 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9352 transitions. [2021-03-10 21:41:13,380 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9352 transitions. Word has length 22 [2021-03-10 21:41:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:13,380 INFO L480 AbstractCegarLoop]: Abstraction has 3101 states and 9352 transitions. [2021-03-10 21:41:13,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9352 transitions. [2021-03-10 21:41:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:13,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:13,383 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:13,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88183 [2021-03-10 21:41:13,584 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:13,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1098053750, now seen corresponding path program 421 times [2021-03-10 21:41:13,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:13,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332008812] [2021-03-10 21:41:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:13,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332008812] [2021-03-10 21:41:13,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618084088] [2021-03-10 21:41:13,788 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 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 21:41:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:13,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:13,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:14,609 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:41:14,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:14,610 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 43 treesize of output 319 [2021-03-10 21:41:17,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:17,845 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:41:17,846 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:41:17,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:41:21,094 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1077 DAG size of output: 876 [2021-03-10 21:41:21,215 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1077 DAG size of output: 876 [2021-03-10 21:41:21,343 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1083 DAG size of output: 882 [2021-03-10 21:41:21,490 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 884 DAG size of output: 1006 [2021-03-10 21:41:23,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:23,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:41:23,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:23,664 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:23,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:23,665 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:41:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:23,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:23,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:41:23,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387747747] [2021-03-10 21:41:23,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:41:23,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:23,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:41:23,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:41:23,721 INFO L87 Difference]: Start difference. First operand 3101 states and 9352 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:25,359 INFO L93 Difference]: Finished difference Result 3518 states and 10379 transitions. [2021-03-10 21:41:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:41:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:41:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:25,365 INFO L225 Difference]: With dead ends: 3518 [2021-03-10 21:41:25,365 INFO L226 Difference]: Without dead ends: 3489 [2021-03-10 21:41:25,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1274.6ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:41:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2021-03-10 21:41:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3086. [2021-03-10 21:41:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3085 states have (on average 3.0145867098865478) internal successors, (9300), 3085 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 9300 transitions. [2021-03-10 21:41:25,401 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 9300 transitions. Word has length 22 [2021-03-10 21:41:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:25,402 INFO L480 AbstractCegarLoop]: Abstraction has 3086 states and 9300 transitions. [2021-03-10 21:41:25,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 9300 transitions. [2021-03-10 21:41:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:25,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:25,404 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:25,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92679,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:25,605 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash 807670862, now seen corresponding path program 422 times [2021-03-10 21:41:25,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:25,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217369906] [2021-03-10 21:41:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217369906] [2021-03-10 21:41:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023528371] [2021-03-10 21:41:25,799 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 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 21:41:25,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:41:25,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:25,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:26,661 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:41:26,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:26,662 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 43 treesize of output 319 [2021-03-10 21:41:28,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:29,456 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:41:29,456 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:41:29,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:41:33,895 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1799 DAG size of output: 1265 [2021-03-10 21:41:34,057 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1850 DAG size of output: 1309 [2021-03-10 21:41:34,262 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 1853 DAG size of output: 1312 [2021-03-10 21:41:34,798 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 2161 DAG size of output: 1511 [2021-03-10 21:41:34,996 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 2161 DAG size of output: 1511 [2021-03-10 21:41:35,213 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 2170 DAG size of output: 1517 [2021-03-10 21:41:35,347 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1512 DAG size of output: 1465 [2021-03-10 21:41:35,530 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1467 DAG size of output: 1191 [2021-03-10 21:41:35,648 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 1098 [2021-03-10 21:41:39,115 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1608 DAG size of output: 1046 [2021-03-10 21:41:39,537 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 2311 DAG size of output: 1367 [2021-03-10 21:41:39,706 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 2311 DAG size of output: 1367 [2021-03-10 21:41:39,997 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 2317 DAG size of output: 1577 [2021-03-10 21:41:41,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:41,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:41:41,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:41,148 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:41,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:41,150 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:41:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:41,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:41,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:41:41,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393612400] [2021-03-10 21:41:41,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:41:41,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:41,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:41:41,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:41:41,205 INFO L87 Difference]: Start difference. First operand 3086 states and 9300 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:42,257 INFO L93 Difference]: Finished difference Result 3368 states and 9970 transitions. [2021-03-10 21:41:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:41:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:41:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:42,262 INFO L225 Difference]: With dead ends: 3368 [2021-03-10 21:41:42,262 INFO L226 Difference]: Without dead ends: 3358 [2021-03-10 21:41:42,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:41:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-03-10 21:41:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 3089. [2021-03-10 21:41:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3088 states have (on average 3.0145725388601035) internal successors, (9309), 3088 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 9309 transitions. [2021-03-10 21:41:42,295 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 9309 transitions. Word has length 22 [2021-03-10 21:41:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:42,295 INFO L480 AbstractCegarLoop]: Abstraction has 3089 states and 9309 transitions. [2021-03-10 21:41:42,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 9309 transitions. [2021-03-10 21:41:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:42,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:42,298 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:42,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94664 [2021-03-10 21:41:42,498 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1825310620, now seen corresponding path program 423 times [2021-03-10 21:41:42,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:42,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908211] [2021-03-10 21:41:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:42,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908211] [2021-03-10 21:41:42,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918165787] [2021-03-10 21:41:42,684 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 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 21:41:42,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:41:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:42,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:43,495 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:41:43,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:43,495 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 43 treesize of output 319 [2021-03-10 21:41:46,590 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1411 DAG size of output: 983 [2021-03-10 21:41:46,699 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1478 DAG size of output: 1023 [2021-03-10 21:41:46,816 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1586 DAG size of output: 1102 [2021-03-10 21:41:48,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:48,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:48,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:41:48,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:41:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:48,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:48,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:41:48,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359664466] [2021-03-10 21:41:48,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:41:48,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:41:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:41:48,679 INFO L87 Difference]: Start difference. First operand 3089 states and 9309 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:49,420 INFO L93 Difference]: Finished difference Result 3246 states and 9771 transitions. [2021-03-10 21:41:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:41:49,421 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:41:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:49,425 INFO L225 Difference]: With dead ends: 3246 [2021-03-10 21:41:49,425 INFO L226 Difference]: Without dead ends: 3230 [2021-03-10 21:41:49,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:41:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2021-03-10 21:41:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3179. [2021-03-10 21:41:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 3.026746381371932) internal successors, (9619), 3178 states have internal predecessors, (9619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 9619 transitions. [2021-03-10 21:41:49,463 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 9619 transitions. Word has length 22 [2021-03-10 21:41:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:49,463 INFO L480 AbstractCegarLoop]: Abstraction has 3179 states and 9619 transitions. [2021-03-10 21:41:49,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 9619 transitions. [2021-03-10 21:41:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:41:49,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:49,466 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:49,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97492 [2021-03-10 21:41:49,667 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:49,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:49,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1081727260, now seen corresponding path program 424 times [2021-03-10 21:41:49,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:49,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645765847] [2021-03-10 21:41:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:49,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645765847] [2021-03-10 21:41:49,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655819092] [2021-03-10 21:41:49,855 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 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 21:41:49,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:41:49,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:49,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:41:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:50,633 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:41:50,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:50,634 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 43 treesize of output 319 [2021-03-10 21:41:55,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:56,349 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:41:56,350 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:41:56,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:41:57,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:57,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:41:57,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:57,829 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:41:57,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:57,830 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:41:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:57,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:57,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:41:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653186670] [2021-03-10 21:41:57,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:41:57,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:41:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:41:57,881 INFO L87 Difference]: Start difference. First operand 3179 states and 9619 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:00,030 INFO L93 Difference]: Finished difference Result 3449 states and 10275 transitions. [2021-03-10 21:42:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:42:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:42:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:00,035 INFO L225 Difference]: With dead ends: 3449 [2021-03-10 21:42:00,035 INFO L226 Difference]: Without dead ends: 3423 [2021-03-10 21:42:00,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1337.9ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:42:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2021-03-10 21:42:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 3191. [2021-03-10 21:42:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 3.0272727272727273) internal successors, (9657), 3190 states have internal predecessors, (9657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 9657 transitions. [2021-03-10 21:42:00,069 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 9657 transitions. Word has length 22 [2021-03-10 21:42:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:00,069 INFO L480 AbstractCegarLoop]: Abstraction has 3191 states and 9657 transitions. [2021-03-10 21:42:00,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 9657 transitions. [2021-03-10 21:42:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:00,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:00,072 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:00,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98695,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:00,272 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash -230583128, now seen corresponding path program 425 times [2021-03-10 21:42:00,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:00,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388389553] [2021-03-10 21:42:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:42:00,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388389553] [2021-03-10 21:42:00,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931596676] [2021-03-10 21:42:00,458 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 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 21:42:00,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:42:00,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:00,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:00,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:01,276 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:42:01,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:01,277 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 43 treesize of output 319 [2021-03-10 21:42:05,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:05,757 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:42:05,758 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:42:05,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:42:08,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:08,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:42:08,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:08,111 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:08,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:08,112 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:42:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:08,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:08,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-03-10 21:42:08,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765192818] [2021-03-10 21:42:08,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:42:08,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:42:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:42:08,163 INFO L87 Difference]: Start difference. First operand 3191 states and 9657 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:09,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:09,668 INFO L93 Difference]: Finished difference Result 3402 states and 10158 transitions. [2021-03-10 21:42:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:42:09,669 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:42:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:09,674 INFO L225 Difference]: With dead ends: 3402 [2021-03-10 21:42:09,674 INFO L226 Difference]: Without dead ends: 3392 [2021-03-10 21:42:09,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1069.3ms TimeCoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:42:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-03-10 21:42:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3215. [2021-03-10 21:42:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3215 states, 3214 states have (on average 3.0286247666459243) internal successors, (9734), 3214 states have internal predecessors, (9734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 9734 transitions. [2021-03-10 21:42:09,708 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 9734 transitions. Word has length 22 [2021-03-10 21:42:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:09,709 INFO L480 AbstractCegarLoop]: Abstraction has 3215 states and 9734 transitions. [2021-03-10 21:42:09,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 9734 transitions. [2021-03-10 21:42:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:09,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:09,711 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:09,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100376,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:09,912 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash 385081188, now seen corresponding path program 426 times [2021-03-10 21:42:09,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:09,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781288476] [2021-03-10 21:42:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:10,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781288476] [2021-03-10 21:42:10,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267845733] [2021-03-10 21:42:10,127 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 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 21:42:10,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:42:10,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:10,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:10,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:11,013 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:42:11,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:11,014 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 43 treesize of output 319 [2021-03-10 21:42:12,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:13,419 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:42:13,420 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:42:13,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:42:16,609 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1263 DAG size of output: 1018 [2021-03-10 21:42:16,745 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1323 DAG size of output: 1067 [2021-03-10 21:42:16,881 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1323 DAG size of output: 1067 [2021-03-10 21:42:17,033 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1333 DAG size of output: 1074 [2021-03-10 21:42:17,239 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1031 DAG size of output: 1057 [2021-03-10 21:42:18,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:18,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:42:18,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:18,956 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:18,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:18,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:42:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:19,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:19,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:42:19,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127386234] [2021-03-10 21:42:19,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:42:19,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:42:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:42:19,016 INFO L87 Difference]: Start difference. First operand 3215 states and 9734 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:20,531 INFO L93 Difference]: Finished difference Result 3519 states and 10443 transitions. [2021-03-10 21:42:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:42:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:42:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:20,536 INFO L225 Difference]: With dead ends: 3519 [2021-03-10 21:42:20,537 INFO L226 Difference]: Without dead ends: 3497 [2021-03-10 21:42:20,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1383.0ms TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:42:20,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2021-03-10 21:42:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3215. [2021-03-10 21:42:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3215 states, 3214 states have (on average 3.028313627878034) internal successors, (9733), 3214 states have internal predecessors, (9733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 9733 transitions. [2021-03-10 21:42:20,571 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 9733 transitions. Word has length 22 [2021-03-10 21:42:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:20,572 INFO L480 AbstractCegarLoop]: Abstraction has 3215 states and 9733 transitions. [2021-03-10 21:42:20,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 9733 transitions. [2021-03-10 21:42:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:20,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:20,574 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:20,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102085 [2021-03-10 21:42:20,775 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:20,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2004161496, now seen corresponding path program 427 times [2021-03-10 21:42:20,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:20,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592712852] [2021-03-10 21:42:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:21,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592712852] [2021-03-10 21:42:21,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716858100] [2021-03-10 21:42:21,020 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 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 21:42:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:21,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:21,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:21,854 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:42:21,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:21,855 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 43 treesize of output 319 [2021-03-10 21:42:27,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:27,690 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:42:27,690 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:42:27,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:42:32,146 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1541 DAG size of output: 1130 [2021-03-10 21:42:32,346 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1749 DAG size of output: 1347 [2021-03-10 21:42:32,519 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1879 DAG size of output: 1385 [2021-03-10 21:42:32,725 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 2170 DAG size of output: 1667 [2021-03-10 21:42:32,936 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 2170 DAG size of output: 1667 [2021-03-10 21:42:33,167 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2179 DAG size of output: 1656 [2021-03-10 21:42:33,352 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1651 DAG size of output: 1608 [2021-03-10 21:42:33,585 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 1610 DAG size of output: 1961 [2021-03-10 21:42:33,753 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1398 DAG size of output: 1488 [2021-03-10 21:42:35,455 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1194 DAG size of output: 1320 [2021-03-10 21:42:37,105 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1667 DAG size of output: 827 [2021-03-10 21:42:37,234 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 2266 DAG size of output: 1159 [2021-03-10 21:42:39,365 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 3262 DAG size of output: 1600 [2021-03-10 21:42:39,599 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 3262 DAG size of output: 1600 [2021-03-10 21:42:39,912 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 3269 DAG size of output: 1672 [2021-03-10 21:42:40,028 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1152 DAG size of output: 1082 [2021-03-10 21:42:41,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:41,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:42:41,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:41,781 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:41,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:41,782 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:42:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:41,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:41,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:42:41,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387637260] [2021-03-10 21:42:41,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:42:41,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:41,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:42:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:42:41,835 INFO L87 Difference]: Start difference. First operand 3215 states and 9733 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:43,274 INFO L93 Difference]: Finished difference Result 3402 states and 10163 transitions. [2021-03-10 21:42:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:42:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:42:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:43,280 INFO L225 Difference]: With dead ends: 3402 [2021-03-10 21:42:43,281 INFO L226 Difference]: Without dead ends: 3392 [2021-03-10 21:42:43,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1263.1ms TimeCoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:42:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-03-10 21:42:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3217. [2021-03-10 21:42:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 3.0282960199004973) internal successors, (9739), 3216 states have internal predecessors, (9739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 9739 transitions. [2021-03-10 21:42:43,320 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 9739 transitions. Word has length 22 [2021-03-10 21:42:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:43,320 INFO L480 AbstractCegarLoop]: Abstraction has 3217 states and 9739 transitions. [2021-03-10 21:42:43,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 9739 transitions. [2021-03-10 21:42:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:43,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:43,324 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:43,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103606,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:43,525 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1238726628, now seen corresponding path program 428 times [2021-03-10 21:42:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:43,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643686446] [2021-03-10 21:42:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:43,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643686446] [2021-03-10 21:42:43,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114898552] [2021-03-10 21:42:43,755 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 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 21:42:43,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:42:43,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:43,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:43,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:44,568 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:42:44,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:44,569 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 43 treesize of output 319 [2021-03-10 21:42:47,084 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1946 DAG size of output: 1032 [2021-03-10 21:42:47,204 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1976 DAG size of output: 1059 [2021-03-10 21:42:47,327 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1976 DAG size of output: 1059 [2021-03-10 21:42:47,451 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1982 DAG size of output: 1065 [2021-03-10 21:42:49,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:50,029 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:42:50,030 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:42:50,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-03-10 21:42:53,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:53,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:42:53,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:53,233 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 21:42:53,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:53,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-03-10 21:42:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:53,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:53,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 21:42:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42611050] [2021-03-10 21:42:53,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:42:53,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:42:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:42:53,282 INFO L87 Difference]: Start difference. First operand 3217 states and 9739 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:54,414 INFO L93 Difference]: Finished difference Result 3419 states and 10208 transitions. [2021-03-10 21:42:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:42:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 21:42:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:54,419 INFO L225 Difference]: With dead ends: 3419 [2021-03-10 21:42:54,419 INFO L226 Difference]: Without dead ends: 3409 [2021-03-10 21:42:54,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1263.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1767, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:42:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-03-10 21:42:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3217. [2021-03-10 21:42:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 3.0282960199004973) internal successors, (9739), 3216 states have internal predecessors, (9739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 9739 transitions. [2021-03-10 21:42:54,454 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 9739 transitions. Word has length 22 [2021-03-10 21:42:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:54,454 INFO L480 AbstractCegarLoop]: Abstraction has 3217 states and 9739 transitions. [2021-03-10 21:42:54,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 9739 transitions. [2021-03-10 21:42:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:54,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:54,457 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:54,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107218,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:54,658 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1023531340, now seen corresponding path program 429 times [2021-03-10 21:42:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:54,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400924237] [2021-03-10 21:42:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:42:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400924237] [2021-03-10 21:42:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233339491] [2021-03-10 21:42:54,814 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 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 21:42:54,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:42:54,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:54,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:54,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:55,509 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:42:55,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:55,510 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 43 treesize of output 319 [2021-03-10 21:42:57,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:57,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:57,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:42:57,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:42:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:57,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:57,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-10 21:42:57,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951755481] [2021-03-10 21:42:57,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:42:57,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:57,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:42:57,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:42:57,748 INFO L87 Difference]: Start difference. First operand 3217 states and 9739 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 21:42:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:58,262 INFO L93 Difference]: Finished difference Result 3243 states and 9776 transitions. [2021-03-10 21:42:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:42:58,264 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 21:42:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:58,268 INFO L225 Difference]: With dead ends: 3243 [2021-03-10 21:42:58,268 INFO L226 Difference]: Without dead ends: 3225 [2021-03-10 21:42:58,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:42:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-03-10 21:42:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 3217. [2021-03-10 21:42:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 3.0276741293532337) internal successors, (9737), 3216 states have internal predecessors, (9737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 9737 transitions. [2021-03-10 21:42:58,305 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 9737 transitions. Word has length 22 [2021-03-10 21:42:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:58,305 INFO L480 AbstractCegarLoop]: Abstraction has 3217 states and 9737 transitions. [2021-03-10 21:42:58,305 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 21:42:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 9737 transitions. [2021-03-10 21:42:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:42:58,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:58,308 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:58,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108744 [2021-03-10 21:42:58,509 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:58,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1915568014, now seen corresponding path program 430 times [2021-03-10 21:42:58,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:58,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981027532] [2021-03-10 21:42:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:58,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981027532] [2021-03-10 21:42:58,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034759245] [2021-03-10 21:42:58,703 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 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 21:42:58,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:42:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:58,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 21:42:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:59,446 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:42:59,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:59,447 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 43 treesize of output 319 [2021-03-10 21:43:01,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:02,106 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-03-10 21:43:02,106 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-03-10 21:43:02,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 Received shutdown request... [2021-03-10 21:43:04,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110580,SelfDestructingSolverStorable109334,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:04,359 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:43:04,362 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:43:04,362 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:43:04 BasicIcfg [2021-03-10 21:43:04,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:43:04,363 INFO L168 Benchmark]: Toolchain (without parser) took 852495.28 ms. Allocated memory was 255.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 236.7 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. [2021-03-10 21:43:04,363 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 178.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:43:04,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.17 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:43:04,363 INFO L168 Benchmark]: Boogie Preprocessor took 27.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:43:04,363 INFO L168 Benchmark]: RCFGBuilder took 422.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 232.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-10 21:43:04,363 INFO L168 Benchmark]: TraceAbstraction took 852005.94 ms. Allocated memory was 255.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 232.2 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. [2021-03-10 21:43:04,363 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 178.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.17 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 422.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 232.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 852005.94 ms. Allocated memory was 255.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 232.2 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 61). Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 851896.6ms, OverallIterations: 442, TraceHistogramMax: 9, EmptinessCheckTime: 551.6ms, AutomataDifference: 172197.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9341 SDtfs, 23647 SDslu, 76366 SDs, 0 SdLazy, 152229 SolverSat, 16588 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63594.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16809 GetRequests, 6078 SyntacticMatches, 183 SemanticMatches, 10548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69213 ImplicationChecksByTransitivity, 149416.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3946occurred in iteration=274, InterpolantAutomatonStates: 8985, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7372.1ms AutomataMinimizationTime, 441 MinimizatonAttempts, 91938 StatesRemovedByMinimization, 438 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1206.2ms SsaConstructionTime, 4367.9ms SatisfiabilityAnalysisTime, 565353.2ms InterpolantComputationTime, 16440 NumberOfCodeBlocks, 16440 NumberOfCodeBlocksAsserted, 1775 NumberOfCheckSat, 15562 ConstructedInterpolants, 4 QuantifiedInterpolants, 156571 SizeOfPredicates, 616 NumberOfNonLiveVariables, 32687 ConjunctsInSsa, 10777 ConjunctsInUnsatCore, 878 InterpolantComputations, 4 PerfectInterpolantSequences, 5308/26839 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